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Metric records

OpenSearch Benchmark stores metrics in the benchmark-metrics-* indexes. A new index is created each month. The following is an example metric record stored in the benchmark-metrics-2023-08 index:

{
  "_index": "benchmark-metrics-2023-08",
  "_id": "UiNY4YkBpMtdJ7uj2rUe",
  "_version": 1,
  "_score": null,
  "_source": {
    "@timestamp": 1691702842821,
    "relative-time-ms": 65.90720731765032,
    "test-execution-id": "8c43ee4c-cb34-494b-81b2-181be244f832",
    "test-execution-timestamp": "20230810T212711Z",
    "environment": "local",
    "workload": "geonames",
    "test_procedure": "append-no-conflicts",
    "provision-config-instance": "external",
    "name": "service_time",
    "value": 607.8001195564866,
    "unit": "ms",
    "sample-type": "normal",
    "meta": {
      "source_revision": "unknown",
      "distribution_version": "1.1.0",
      "distribution_flavor": "oss",
      "index": "geonames",
      "took": 13,
      "success": true,
      "success-count": 125,
      "error-count": 0
    },
    "task": "index-append",
    "operation": "index-append",
    "operation-type": "bulk"
  },
  "fields": {
    "@timestamp": [
      "2023-08-10T21:27:22.821Z"
    ],
    "test-execution-timestamp": [
      "2023-08-10T21:27:11.000Z"
    ]
  },
  "highlight": {
    "workload": [
      "@opensearch-dashboards-highlighted-field@geonames@/opensearch-dashboards-highlighted-field@"
    ],
    "meta.index": [
      "@opensearch-dashboards-highlighted-field@geonames@/opensearch-dashboards-highlighted-field@"
    ]
  },
  "sort": [
    1691702831000
  ]
}

The following fields found in the _source section of the metric's record are configurable in the opensearch-benchmarks-metrics-* file.

@timestamp

The timestamp of when the sample was taken since the epoch, in milliseconds. For request-related metrics, such as latency or service_time, this is the timestamp of when OpenSearch Benchmark issued the request.

relative-time-ms

The relative time since the start of the benchmark, in milliseconds. This is useful for comparing time-series graphs across multiple tests. For example, you can compare the indexing throughput over time across multiple tests.

test-execution-id

A UUID that changes on every invocation of the workload. It is intended to group all samples of a benchmarking run.

test-execution-timestamp

The timestamp of when the workload was invoked (always in UTC).

environment

The environment describes the origin of a metric record. This is defined when initially configuring OpenSearch Benchmark. You can use separate environments for different benchmarks but store the metric records in the same index.

workload, test_procedure, provision-config-instance

The workload, test procedures, and configuration instances for which the metrics are produced.

name, value, unit

The actual metric name and value, with an optional unit. Depending on the nature of a metric, it is either sampled periodically by OpenSearch Benchmark, for example, CPU utilization or query latency, or measured once, for example, the final size of the index.

sample-type

Determines whether to configure a benchmark to run in warmup mode by setting it to warmup or normal. Only normal samples are considered for the results that are reported.

Next steps

For more information about how to access OpenSearch Benchmark metrics, see Metrics.
For more information about the metrics stored in OpenSearch Benchmark, see Metric keys.

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