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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2016/06/06 21:54:21 UTC
[jira] [Updated] (HBASE-15971) Regression: Random Read/WorkloadC
slower in 1.x than 0.98
[ https://issues.apache.org/jira/browse/HBASE-15971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
stack updated HBASE-15971:
--------------------------
Attachment: 098.png
branch-1.png
branch-1.hits.png
098.hits.png
Here are graphs of me running ycsb -- both asynchbase and hbase10 -- on 8 servers pounding a single node carrying all regions. See how we do about 125k in branch-1 and 300k in 0.98. See how the handler occupancy is less in branch-1.
> 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.
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