[jira] [Resolved] (HBASE-12912) Cache Configuration used during scanner creation

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-12912?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-12912.
------------------------------------
    Resolution: Fixed

Resolved by parent.

> Cache Configuration used during scanner creation
> ------------------------------------------------
>
>                 Key: HBASE-12912
>                 URL: https://issues.apache.org/jira/browse/HBASE-12912
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: John Leach
>         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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