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https://issues.apache.org/jira/browse/HBASE-27225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Beaudreault updated HBASE-27225:
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Fix Version/s: 2.5.0
(was: 2.5.1)
> Add BucketAllocator bucket size statistic logging
> -------------------------------------------------
>
> Key: HBASE-27225
> URL: https://issues.apache.org/jira/browse/HBASE-27225
> Project: HBase
> Issue Type: Improvement
> Reporter: Bryan Beaudreault
> Assignee: Bryan Beaudreault
> Priority: Major
> Labels: patch-available
> Fix For: 2.5.0, 3.0.0-alpha-4, 2.4.14
>
>
> BucketCache places blocks into configurably sized buckets based on the block
> size. The default sizes aim to provide broad coverage for common block sizes,
> but should probably be tuned for certain use-cases. However, we provide no
> way for operators to gain insight into the distribution of buckets.
> There already exists a BucketAllocator#logStatistics method, but it is not
> called anywhere. I suggest that we hook that up in BucketCache#logStats
> (which is called periodically by a stats thread). We can go from there.
> Looking at the IndexStatistics used in that method, it looks like a good
> start. One thing I'd like to add is a count of freeBuckets and
> completelyFreeBuckets per index. I think this will be useful for indicating
> how much more wiggle room we have for redistributing buckets among the
> various block sizes.
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