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Add CollectionUsage.getUsed() to MemoryPool gauges #786

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merged 2 commits into from Apr 24, 2015

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@Menthalion Menthalion commented Apr 24, 2015

For monitoring memory usage, the memory used gauge is not very suitable to put automated analysis on, because it can be varying wildly. A better choice for these situations would be the JMX metric of the memory that's still in use after the last garbage collection. This gives a more accurate indication of retained memory, without varying short lived object allocation.

This pull requests adds it as a gauge to the memory pool gauge set with postfix "used-after-gc".

The rest of the CollectionUsage methods (init, committed, max) are of no value, since they're basically identical to the normal MemoryUsage of the same pool, and are therefore not included.

ryantenney added a commit that referenced this pull request Apr 24, 2015
Add CollectionUsage.getUsed() to MemoryPool gauges
@ryantenney ryantenney merged commit 86f4974 into dropwizard:master Apr 24, 2015
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