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Posted to issues@hbase.apache.org by "John Leach (JIRA)" <ji...@apache.org> on 2015/07/16 21:33:04 UTC
[jira] [Commented] (HBASE-12912) StoreScanner calls Configuration
for Boolean Check on each initialization
[ https://issues.apache.org/jira/browse/HBASE-12912?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14630216#comment-14630216 ]
John Leach commented on HBASE-12912:
------------------------------------
Let me take a shot at it.
> StoreScanner calls Configuration for Boolean Check on each initialization
> -------------------------------------------------------------------------
>
> Key: HBASE-12912
> URL: https://issues.apache.org/jira/browse/HBASE-12912
> Project: HBase
> Issue Type: Bug
> Reporter: John Leach
> Assignee: John Leach
> Fix For: 2.0.0, 0.98.14, 1.1.2, 1.3.0, 1.2.1, 1.0.3
>
> Attachments: StoreScannerStall.tiff
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> There is a clear CPU drain and iterator creation when creating store scanners under high load. Splice was running a TPCC test of our database and we are seeing object creation and CPU waste on the boolean check....
> Code Snippet...
> if (store != null && ((HStore)store).getHRegion() != null
> && store.getStorefilesCount() > 1) {
> RegionServerServices rsService = ((HStore)store).getHRegion().getRegionServerServices();
> if (rsService == null || !rsService.getConfiguration().getBoolean(
> STORESCANNER_PARALLEL_SEEK_ENABLE, false)) return;
> isParallelSeekEnabled = true;
> executor = rsService.getExecutorService();
> }
> Will attach profile...
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