848 lines
22 KiB
Markdown
848 lines
22 KiB
Markdown
---
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layout: default
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title: Metrics Reference
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parent: Performance Analyzer
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nav_order: 3
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redirect_from:
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- /monitoring-plugins/pa/reference/
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---
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# Metrics reference
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Performance Analyzer provides a number of metrics to help you evaluate performance. The following tables describe the available metrics, grouped by the dimensions that are most relevant for that metric. All metrics support the `avg`, `sum`, `min`, and `max` aggregations, although for certain metrics, the measured value is the same regardless of aggregation type.
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For information about each of the dimensions, see [dimensions reference](#dimensions-reference) later in this topic.
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This list is extensive. We recommend using Ctrl/Cmd + F to find what you're looking for.
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{: .tip }
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## Relevant dimensions: `ShardID`, `IndexName`, `Operation`, `ShardRole`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>CPU_Utilization
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</td>
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<td>CPU usage ratio. CPU time (in milliseconds) used by the associated thread(s) in the past five seconds, divided by 5000 milliseconds.
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</td>
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</tr>
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<tr>
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<td>Paging_MajfltRate
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</td>
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<td>The number of major faults per second in the past five seconds. A major fault requires the process to load a memory page from disk.
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</td>
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</tr>
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<tr>
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<td>Paging_MinfltRate
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</td>
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<td>The number of minor faults per second in the past five seconds. A minor fault does not requires the process to load a memory page from disk.
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</td>
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</tr>
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<tr>
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<td>Paging_RSS
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</td>
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<td>The number of pages the process has in real memory---the pages that count towards text, data, or stack space. This number does not include pages that have not been demand-loaded in or swapped out.
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</td>
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</tr>
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<tr>
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<td>Sched_Runtime
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</td>
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<td>Time (seconds) spent executing on the CPU per context switch.
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</td>
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</tr>
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<tr>
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<td>Sched_Waittime
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</td>
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<td>Time (seconds) spent waiting on a run queue per context switch.
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</td>
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</tr>
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<tr>
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<td>Sched_CtxRate
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</td>
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<td>Number of times run on the CPU per second in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Heap_AllocRate
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</td>
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<td>An approximation, in bytes, of the heap memory allocated per second in the last 5 seconds.
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</td>
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</tr>
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<tr>
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<td>IO_ReadThroughput
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</td>
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<td>Number of bytes read per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>IO_WriteThroughput
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</td>
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<td>Number of bytes written per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>IO_TotThroughput
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</td>
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<td>Number of bytes read or written per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>IO_ReadSyscallRate
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</td>
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<td>Read system calls per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>IO_WriteSyscallRate
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</td>
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<td>Write system calls per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>IO_TotalSyscallRate
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</td>
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<td>Read and write system calls per second in the last five seconds.
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</td>
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</tr>
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<tr>
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<td>Thread_Blocked_Time
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</td>
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<td>The average amount of time, in seconds, that the associated thread has been blocked from entering or reentering a monitor.
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</td>
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</tr>
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<tr>
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<td>Thread_Blocked_Event
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</td>
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<td>The total number of times that the associated thread has been blocked from entering or reentering a monitor (that is, the number of times a thread has been in the `blocked` state).
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</td>
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</tr>
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<tr>
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<td>Thread_Waited_Time
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</td>
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<td>The average amount of time, in seconds, that the associated thread has waited to enter or reenter a monitor (that is, the amount of time a thread has been in the `WAITING` or `TIMED_WAITING` state)".
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</td>
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</tr>
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<tr>
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<td>Thread_Waited_Event
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</td>
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<td>The total number of times that the associated thread has waited to enter or reenter a monitor (that is, the number of times a thread has been in the <code>WAITING</code> or <code>TIMED_WAITING</code> state).
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</td>
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</tr>
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<tr>
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<td>ShardEvents
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</td>
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<td>The total number of events executed on a shard in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>ShardBulkDocs
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</td>
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<td>The total number of documents indexed in the past five seconds.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimensions: `ShardID`, `IndexName`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Indexing_ThrottleTime
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</td>
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<td>Time (milliseconds) that the index has been under merge throttling control in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_Query_Hit
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</td>
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<td>The number of successful lookups in the query cache in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_Query_Miss
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</td>
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<td>The number of lookups in the query cache that failed to retrieve a `DocIdSet` in the past five seconds. `DocIdSet` is a set of document IDs in Lucene.
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</td>
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</tr>
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<tr>
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<td>Cache_Query_Size
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</td>
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<td>Query cache memory size in bytes.
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</td>
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</tr>
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<tr>
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<td>Cache_FieldData_Eviction
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</td>
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<td>The number of times OpenSearch has evicted data from the fielddata heap space (occurs when the heap space is full) in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_FieldData_Size
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</td>
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<td>Fielddata memory size in bytes.
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</td>
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</tr>
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<tr>
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<td>Cache_Request_Hit
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</td>
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<td>The number of successful lookups in the shard request cache in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_Request_Miss
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</td>
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<td>The number of lookups in the request cache that failed to retrieve the results of search requests in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_Request_Eviction
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</td>
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<td>The number of times OpenSearch evicts data from shard request cache (occurs when the request cache is full) in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Cache_Request_Size
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</td>
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<td>Shard request cache memory size in bytes.
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</td>
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</tr>
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<tr>
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<td>Refresh_Event
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</td>
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<td>The total number of refreshes executed in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Refresh_Time
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</td>
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<td>The total time (milliseconds) spent executing refreshes in the past five seconds
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</td>
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</tr>
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<tr>
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<td>Flush_Event
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</td>
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<td>The total number of flushes executed in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Flush_Time
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</td>
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<td>The total time (milliseconds) spent executing flushes in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Merge_Event
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</td>
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<td>The total number of merges executed in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Merge_Time
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</td>
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<td>The total time (milliseconds) spent executing merges in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Merge_CurrentEvent
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</td>
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<td>The current number of merges executing.
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</td>
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</tr>
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<tr>
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<td>Indexing_Buffer
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</td>
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<td>Index buffer memory size in bytes.
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</td>
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</tr>
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<tr>
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<td>Segments_Total
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</td>
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<td>The number of segments.
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</td>
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</tr>
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<tr>
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<td>IndexWriter_Memory
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</td>
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<td>Estimated memory usage by the index writer in bytes.
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</td>
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</tr>
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<tr>
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<td>Bitset_Memory
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</td>
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<td>Estimated memory usage for the cached bit sets in bytes.
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</td>
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</tr>
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<tr>
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<td>VersionMap_Memory
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</td>
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<td>Estimated memory usage of the version map in bytes.
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</td>
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</tr>
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<tr>
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<td>Shard_Size_In_Bytes
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</td>
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<td>Estimated disk usage of the shard in bytes.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimensions: `ShardID`, `IndexName`, `IndexingStage`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Indexing_Pressure_Current_Limits
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</td>
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<td>The total heap size, in bytes, that is available for use by an index shard in a particular indexing stage (Coordinating, Primary, or Replica).
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</td>
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</tr>
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<tr>
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<td>Indexing_Pressure_Current_Bytes
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</td>
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<td>The total heap size, in bytes, occupied by an index shard in a particular indexing stage (Coordinating, Primary, or Replica).
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</td>
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</tr>
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<tr>
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<td>Indexing_Pressure_Last_Successful_Timestamp
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</td>
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<td>The timestamp of a successful request for an index shard in a particular indexing stage (Coordinating, Primary, or Replica).
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</td>
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</tr>
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<tr>
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<td>Indexing_Pressure_Rejection_Count
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</td>
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<td>The total number of rejections performed by OpenSearch for an index shard in a particular indexing stage (Coordinating, Primary, or Replica).
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</td>
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</tr>
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<tr>
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<td>Indexing_Pressure_Average_Window_Throughput
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</td>
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<td>The average throughput of the last n requests (The value of n is determined by the `shard_indexing_pressure.secondary_parameter.throughput.request_size_window` setting) for an index shard in a particular indexing stage (Coordinating, Primary, or Replica).
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimensions: `Operation`, `Exception`, `Indices`, `HTTPRespCode`, `ShardID`, `IndexName`, `ShardRole`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Latency
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</td>
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<td>Latency (milliseconds) of a request.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimension: `MemType`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>GC_Collection_Event
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</td>
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<td>The number of garbage collections that have occurred in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>GC_Collection_Time
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</td>
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<td>The approximate accumulated time (milliseconds) of all garbage collections that have occurred in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Heap_Committed
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</td>
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<td>The amount of memory (bytes) that is committed for the JVM to use.
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</td>
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</tr>
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<tr>
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<td>Heap_Init
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</td>
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<td>The amount of memory (bytes) that the JVM initially requests from the operating system for memory management.
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</td>
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</tr>
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<tr>
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<td>Heap_Max
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</td>
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<td>The maximum amount of memory (bytes) that can be used for memory management.
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</td>
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</tr>
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<tr>
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<td>Heap_Used
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</td>
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<td>The amount of used memory in bytes.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimension: `DiskName`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Disk_Utilization
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</td>
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<td>Disk utilization rate: percentage of disk time spent reading and writing by the OpenSearch process in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Disk_WaitTime
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</td>
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<td>Average duration (milliseconds) of read and write operations in the past five seconds.
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</td>
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</tr>
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<tr>
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<td>Disk_ServiceRate
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</td>
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<td>Service rate: MB read or written per second in the past five seconds. This metric assumes that each disk sector stores 512 bytes.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimension: `DestAddr`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Net_TCP_NumFlows
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</td>
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<td>The number of samples collected. Performance Analyzer collects 1 sample every 5 seconds.
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</td>
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</tr>
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<tr>
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<td>Net_TCP_TxQ
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</td>
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<td>The average number of TCP packets in the send buffer.
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</td>
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</tr>
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<tr>
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<td>Net_TCP_RxQ
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</td>
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<td>The average number of TCP packets in the receive buffer.
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</td>
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</tr>
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<tr>
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<td>Net_TCP_Lost
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</td>
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<td>The average number of unrecovered recurring timeouts. This number is reset when the recovery finishes or `SND.UNA` is advanced. `SND.UNA` is the sequence number of the first byte of data that has been sent but not yet acknowledged.
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</td>
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</tr>
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<tr>
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<td>Net_TCP_SendCWND
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</td>
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<td>The average size, in bytes, of the sending congestion window.
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</td>
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</tr>
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<tr>
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<td>Net_TCP_SSThresh
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</td>
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<td>The average size, in bytes, of the slow start size threshold.
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</td>
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</tr>
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</tbody>
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</table>
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## Relevant dimension: `Direction`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>Net_PacketRate4
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</td>
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<td>The total number of IPv4 datagrams transmitted/received from/by interfaces per second, including those transmitted or received in error.
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</td>
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</tr>
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<tr>
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<td>Net_PacketDropRate4
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</td>
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<td>The total number of IPv4 datagrams transmitted or received in error per second.
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</td>
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</tr>
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<tr>
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<td>Net_PacketRate6
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</td>
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<td>The total number of IPv6 datagrams transmitted or received from or by interfaces per second, including those transmitted or received in error.
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</td>
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</tr>
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<tr>
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<td>Net_PacketDropRate6
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</td>
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<td>The total number of IPv6 datagrams transmitted or received in error per second.
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</td>
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</tr>
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<tr>
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<td>Net_Throughput
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</td>
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<td>The number of bits transmitted or received per second by all network interfaces.
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</td>
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</tr>
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</tbody>
|
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</table>
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## Relevant dimension: `ThreadPoolType`
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<table>
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<thead style="text-align: left">
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<tr>
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<th>Metric</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td>ThreadPool_QueueSize
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</td>
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<td>The size of the task queue.
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</td>
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</tr>
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<tr>
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<td>ThreadPool_RejectedReqs
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</td>
|
|
<td>The number of rejected executions.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ThreadPool_TotalThreads
|
|
</td>
|
|
<td>The current number of threads in the pool.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ThreadPool_ActiveThreads
|
|
</td>
|
|
<td>The approximate number of threads that are actively executing tasks.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ThreadPool_QueueLatency
|
|
</td>
|
|
<td>The latency of the task queue.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ThreadPool_QueueCapacity
|
|
</td>
|
|
<td>The current capacity of the task queue.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimension: `ClusterManager_PendingTaskType`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>ClusterManager_PendingQueueSize
|
|
</td>
|
|
<td>The current number of pending tasks in the cluster state update thread. Each node has a cluster state update thread that submits cluster state update tasks, such as create index, update mapping, allocate shard, and fail shard.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimensions: `Operation`, `Exception`, `Indices`, `HTTPRespCode`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>HTTP_RequestDocs
|
|
</td>
|
|
<td>The number of items in the request (only for the `_bulk` request type).
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>HTTP_TotalRequests
|
|
</td>
|
|
<td>The number of requests completed in the last 5 seconds.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimension: `CBType`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>CB_EstimatedSize
|
|
</td>
|
|
<td>The current number of estimated bytes.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>CB_TrippedEvents
|
|
</td>
|
|
<td>The number of times that the circuit breaker has tripped.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>CB_ConfiguredSize
|
|
</td>
|
|
<td>The limit, in bytes, of the amount of memory operations can use.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimensions: `ClusterManagerTaskInsertOrder`, `ClusterManagerTaskPriority`, `ClusterManagerTaskType`, `ClusterManagerTaskMetadata`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>ClusterManager_Task_Queue_Time
|
|
</td>
|
|
<td>The amount of time, in milliseconds, that a cluster manager task spent in the queue.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ClusterManager_Task_Run_Time
|
|
</td>
|
|
<td>The amount of time, in milliseconds, that a cluster manager task has been running.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimension: `CacheType`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>Cache_MaxSize
|
|
</td>
|
|
<td>The maximum size of the cache, in bytes.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimension: `ControllerName`
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>AdmissionControl_RejectionCount
|
|
</td>
|
|
<td>The total number of rejections performed by a Controller of Admission Control.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>AdmissionControl_CurrentValue
|
|
</td>
|
|
<td>The current value for Controller of Admission Control.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>AdmissionControl_ThresholdValue
|
|
</td>
|
|
<td>The threshold value for Controller of Admission Control.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimension: `NodeID`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>Data_RetryingPendingTasksCount
|
|
</td>
|
|
<td>The number of throttled pending tasks on which the data node is actively performing retries. It is an absolute metric at that point in time.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ClusterManager_ThrottledPendingTasksCount
|
|
</td>
|
|
<td>The sum of the total pending tasks that were throttled by the cluster manager node. This is a cumulative metric, so make sure to check the max aggregation.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimensions: N/A
|
|
The following metrics are relevant to the cluster as a whole and do not require specific dimensions.
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>Election_Term
|
|
</td>
|
|
<td>A number that increases monotonically with every cluster manager election.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>PublishClusterState_Latency
|
|
</td>
|
|
<td>The amount of time taken by the quorum of nodes to publish the new cluster state. This metric is available for the current cluster manager.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>PublishClusterState_Failure
|
|
</td>
|
|
<td>The number of times the new cluster state failed to publish on the cluster manager node.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ClusterApplierService_Latency
|
|
</td>
|
|
<td>The amount of time taken by each node for the apply cluster state sent by the cluster manager.
|
|
</td>
|
|
</tr>
|
|
<tr>
|
|
<td>ClusterApplierService_Failure
|
|
</td>
|
|
<td>The number of times that the apply cluster state action failed on each node.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
## Relevant dimensions: `IndexName`, `NodeName`, `ShardType`, `ShardID`
|
|
|
|
<table>
|
|
<thead style="text-align: left">
|
|
<tr>
|
|
<th>Metric</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td>Shard_State
|
|
</td>
|
|
<td>The state of each shard, for example, `STARTED`, `UNASSIGNED`, or `RELOCATING`.
|
|
</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
|
|
## Dimensions reference
|
|
|
|
| Dimension | Return values |
|
|
|----------------------|-------------------------------------------------|
|
|
| ShardID | The ID of the shard, for example, `1`. |
|
|
| IndexName | The name of the index, for example, `my-index`. |
|
|
| Operation | The type of operation, for example, `shardbulk`. |
|
|
| ShardRole | The shard role, for example, `primary` or `replica`. |
|
|
| Exception | OpenSearch exceptions, for example, `org.opensearch.index_not_found_exception`. |
|
|
| Indices | The list of indexes in the request URL. |
|
|
| HTTPRespCode | The response code from OpenSearch, for example, `200`. |
|
|
| MemType | The memory type, for example, `totYoungGC`, `totFullGC`, `Survivor`, `PermGen`, `OldGen`, `Eden`, `NonHeap`, or `Heap`. |
|
|
| DiskName | The name of the disk, for example, `sda1`. |
|
|
| DestAddr | The destination address, for example, `010015AC`. |
|
|
| Direction | The direction, for example, `in` or `out`. |
|
|
| ThreadPoolType | The OpenSearch thread pools, for example, `index`, `search`, or `snapshot`. |
|
|
| CBType | The circuit breaker type, for example, `accounting`, `fielddata`, `in_flight_requests`, `parent`, or `request`. |
|
|
| ClusterManagerTaskInsertOrder| The order in which the task was inserted, for example, `3691`. |
|
|
| ClusterManagerTaskPriority | The priority of the task, for example, `URGENT`. OpenSearch executes higher-priority tasks before lower-priority ones, regardless of `insert_order`. |
|
|
| ClusterManagerTaskType | The task type, for example, `shard-started`, `create-index`, `delete-index`, `refresh-mapping`, `put-mapping`, `CleanupSnapshotRestoreState`, or `Update snapshot state`. |
|
|
| ClusterManagerTaskMetadata | The metadata for the task (if any). |
|
|
| CacheType | The cache type, for example, `Field_Data_Cache`, `Shard_Request_Cache`, or `Node_Query_Cache`. |
|
|
|