[jira] [Commented] (HBASE-15971) Regression: Random Read/WorkloadC slower in 1.x than 0.98

["Mikhail Antonov (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-15971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317366#comment-15317366 ] 

Mikhail Antonov commented on HBASE-15971:
-----------------------------------------

Ouch.

Do you have any feeling at what point this regression creeped in? Likely a blocker for 1.3 (and other branches). Also from the posted charts I'm not sure I immediately see lower ipc readers, but numCallsInGeneralQueue is different drastically.. 

> Regression: Random Read/WorkloadC slower in 1.x than 0.98
> ---------------------------------------------------------
>
>                 Key: HBASE-15971
>                 URL: https://issues.apache.org/jira/browse/HBASE-15971
>             Project: HBase
>          Issue Type: Sub-task
>          Components: rpc
>            Reporter: stack
>            Assignee: stack
>            Priority: Critical
>         Attachments: 098.hits.png, 098.png, branch-1.hits.png, branch-1.png
>
>
> branch-1 is slower than 0.98 doing YCSB random read/workloadC. It seems to be doing about 1/2 the throughput of 0.98.
> In branch-1, we have low handler occupancy compared to 0.98. Hacking in reader thread occupancy metric, is about the same in both. In parent issue, hacking out the scheduler, I am able to get branch-1 to go 3x faster so will dig in here.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)