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Posted to issues@hbase.apache.org by "Doug Meil (JIRA)" <ji...@apache.org> on 2011/07/29 12:56:10 UTC
[jira] [Updated] (HBASE-4089) blockCache contents report
[ https://issues.apache.org/jira/browse/HBASE-4089?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doug Meil updated HBASE-4089:
-----------------------------
Description:
A UI that would display a block-cache report for a RegionServer would be helpful. For example ...
table1
cf1 100 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
cf2 200 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
table2
cf1 75 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
cf2 150 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
... Etc.
The current metrics list blockCacheSize and blockCacheFree, but there is no way to know what's in there. Any single block isn't really important, but the patterns of what CF/Table they came from, how big are they, and how long (on average) they've been in the cache, are important.
No such interface exists in HRegionInterface, so this is not just a UI request also an API change. But I think it would be helpful from an operational perspective.
was:
A UI that would display a block-cache report for a RegionServer would be helpful. For example ...
table1
cf1 100 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
cf2 200 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
table2
cf1 75 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
cf2 150 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
... Etc.
The current metrics list blockCacheSize and blockCacheFree, but there is no way to know what's in there. Any single block isn't really important, but the patterns of what CF/Table they came from, how big are they, and how long (on average) they've been in the cache, are important.
No such interface exists in HRegionInterface, so this is not just a UI request also an API change. But I think it would be helpful from an operational perspective.
Summary: blockCache contents report (was: UI for blockCache contents report)
> blockCache contents report
> --------------------------
>
> Key: HBASE-4089
> URL: https://issues.apache.org/jira/browse/HBASE-4089
> Project: HBase
> Issue Type: New Feature
> Reporter: Doug Meil
>
> A UI that would display a block-cache report for a RegionServer would be helpful. For example ...
> table1
> cf1 100 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
> cf2 200 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
> table2
> cf1 75 blocks, totalBytes=yyyyy, averageTimeInCache=XXXX hours
> cf2 150 blocks, totalBytes=zzzzz, averageTimeInCache=XXXX hours
> ... Etc.
> The current metrics list blockCacheSize and blockCacheFree, but there is no way to know what's in there. Any single block isn't really important, but the patterns of what CF/Table they came from, how big are they, and how long (on average) they've been in the cache, are important.
> No such interface exists in HRegionInterface, so this is not just a UI request also an API change. But I think it would be helpful from an operational perspective.
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