hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3680) Publish more metrics about mslab
Date Fri, 21 Oct 2011 03:00:34 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3680?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HBASE-3680:

    Attachment: hbase-3680.txt

Here's a patch which adds the metric. I tested by firing up a standalone instance and using
jconsole to check that it showed the right value in JMX.
> Publish more metrics about mslab
> --------------------------------
>                 Key: HBASE-3680
>                 URL: https://issues.apache.org/jira/browse/HBASE-3680
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.1
>            Reporter: Jean-Daniel Cryans
>            Assignee: Todd Lipcon
>             Fix For: 0.92.0
>         Attachments: hbase-3680.txt
> We have been using mslab on all our clusters for a while now and it seems it tends to
OOME or send us into GC loops of death a lot more than it used to. For example, one RS with
mslab enabled and 7GB of heap died out of OOME this afternoon; it had .55GB in the block cache
and 2.03GB in the memstores which doesn't account for much... but it could be that because
of mslab a lot of space was lost in those incomplete 2MB blocks and without metrics we can't
really tell. Compactions were running at the time of the OOME and I see block cache activity.
The average load on that cluster is 531.
> We should at least publish the total size of all those blocks and maybe even take actions
based on that (like force flushing).

This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira


View raw message