[
https://issues.apache.org/jira/browse/HBASE-18156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16040164#comment-16040164
]
Anoop Sam John commented on HBASE-18156:
----------------------------------------
Bit ugly the way we get L1 and L2 cache refs in jsp page. Knowing too much of
the internal setup. Combined Cache not able to return any stats. Ya as the
return type is single data structure. We should try to make it bit more
generic?
> Provide a tool to show block cache summary
> ------------------------------------------
>
> Key: HBASE-18156
> URL: https://issues.apache.org/jira/browse/HBASE-18156
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 2.0.0, 1.4.0
> Reporter: Allan Yang
> Assignee: Allan Yang
> Attachments: HBASE-18156.patch, HBASE-18156.v2.patch
>
>
> HBASE-17757 is already committed. But since there is no easy way to show the
> size distribution of cached blocks, it is hard to decide the unified size
> should be used.
> Here I provide a tool to show the details of size distribution of cached
> blocks. This tool is well used in our production environment. It is a jsp
> page summaries the cache details like this
> {code}
> BlockCache type:org.apache.hadoop.hbase.io.hfile.LruBlockCache
> LruBlockCache
> Total size:28.40 GB
> Current size:22.49 GB
> MetaBlock size:1.56 GB
> Free size:5.91 GB
> Block count:152684
> Size distribution summary:
> BlockCacheSizeDistributionSummary [0 B<=blocksize<4 KB, blocks=833,
> heapSize=1.19 MB]
> BlockCacheSizeDistributionSummary [4 KB<=blocksize<8 KB, blocks=65,
> heapSize=310.83 KB]
> BlockCacheSizeDistributionSummary [8 KB<=blocksize<12 KB, blocks=175,
> heapSize=1.46 MB]
> BlockCacheSizeDistributionSummary [12 KB<=blocksize<16 KB, blocks=18,
> heapSize=267.43 KB]
> BlockCacheSizeDistributionSummary [16 KB<=blocksize<20 KB, blocks=512,
> heapSize=8.30 MB]
> BlockCacheSizeDistributionSummary [20 KB<=blocksize<24 KB, blocks=22,
> heapSize=499.66 KB]
> BlockCacheSizeDistributionSummary [24 KB<=blocksize<28 KB, blocks=24,
> heapSize=632.59 KB]
> BlockCacheSizeDistributionSummary [28 KB<=blocksize<32 KB, blocks=34,
> heapSize=1.02 MB]
> BlockCacheSizeDistributionSummary [32 KB<=blocksize<36 KB, blocks=31,
> heapSize=1.02 MB]
> BlockCacheSizeDistributionSummary [36 KB<=blocksize<40 KB, blocks=22,
> heapSize=838.58 KB]
> BlockCacheSizeDistributionSummary [40 KB<=blocksize<44 KB, blocks=28,
> heapSize=1.15 MB]
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
