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HBASE-17562 Removed documentation for coprocessor execution times 

Signed-off-by: Michael Stack <stack@apache.org>
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Jan Hentschel 2017-01-29 14:58:58 +01:00 committed by Michael Stack
parent 52ad310c80
commit f576f4678a
2 changed files with 0 additions and 20 deletions
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src/main/asciidoc/_chapters/cp.adoc
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@ -799,26 +799,6 @@ for (Result res : scanner) {
}
----
== Monitor Time Spent in Coprocessors
HBase 0.98.5 introduced the ability to monitor some statistics relating to the amount of time
spent executing a given Coprocessor.
You can see these statistics via the HBase Metrics framework (see <<hbase_metrics>> or the Web UI
for a given Region Server, via the _Coprocessor Metrics_ tab.
These statistics are valuable for debugging and benchmarking the performance impact of a given
Coprocessor on your cluster.
Tracked statistics include min, max, average, and 90th, 95th, and 99th percentile.
All times are shown in milliseconds.
The statistics are calculated over Coprocessor execution samples recorded during the reporting
interval, which is 10 seconds by default.
The metrics sampling rate as described in <<hbase_metrics>>.
.Coprocessor Metrics UI
image::coprocessor_stats.png[]
== Restricting Coprocessor Usage
Restricting arbitrary user coprocessors can be a big concern in multitenant environments. HBase provides a continuum of options for ensuring only expected coprocessors are running:

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src/main/site/resources/images/coprocessor_stats.png
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