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ARTEMIS-1131 Configure optimal GC settings

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Francesco Nigro 2017-04-27 16:50:11 +02:00 committed by Martyn Taylor
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docs/user-manual/en/perf-tuning.md
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@ -207,6 +207,14 @@ tunings won't apply to JDKs from other providers (e.g. IBM or JRockit)
arguments `-Xms` and `-Xmx` to set server available RAM. We
recommend setting them to the same high value.
When under periods of high load, it is likely that Artemis will be generating
and destroying lots of objects. This can result in a build up of stale objects.
To reduce the chance of running out of memory and causing a full GC
(which may introduce pauses and unintentional behaviour), it is recommended that the
max heap size (`-Xmx`) for the JVM is set at least to 5 x the `global-max-size` of the broker.
As an example, in a situation where the broker is under high load and running
with a `global-max-size` of 1GB, it is recommended the the max heap size is set to 5GB.
- Aggressive options. Different JVMs provide different sets of JVM
tuning parameters, for the Sun Hotspot JVM the full list of options
is available