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https://issues.apache.org/jira/browse/HBASE-5349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13204325#comment-13204325
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Zhihong Yu commented on HBASE-5349:
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I am thinking of introducing rolling counters (using circular buffer) for both
MemStore and LruBlockCache.
We record the number of flushes (for MemStore) and evictions (for
LruBlockCache), respectively.
Every 1 (configurable) minute, we roll the counters.
It should be straight forward to observe whether MemStore or LruBlockCache is
under pressure by looking at the trend of the rolling counters.
Once we determine the one under pressure, we can utilize what J-D described
above to shift heap among the two.
We can also introduce weights between MemStore and LruBlockCache for the
rolling counters.
> Automagically tweak global memstore and block cache sizes based on workload
> ---------------------------------------------------------------------------
>
> Key: HBASE-5349
> URL: https://issues.apache.org/jira/browse/HBASE-5349
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.92.0
> Reporter: Jean-Daniel Cryans
> Fix For: 0.94.0
>
>
> Hypertable does a neat thing where it changes the size given to the CellCache
> (our MemStores) and Block Cache based on the workload. If you need an image,
> scroll down at the bottom of this link:
> http://www.hypertable.com/documentation/architecture/
> That'd be one less thing to configure.
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