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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-2327) Table.flusherLock is static final.. remove static.
Date Tue, 15 Mar 2011 07:49:29 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13006824#comment-13006824
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Sylvain Lebresne commented on CASSANDRA-2327:
---------------------------------------------

I'll remark that in trunk the flusherLock don't block reads and writes anymore (see CASSANDRA-1954).
We decided this was a change subtle enough to not put it in a stable version.

> Table.flusherLock is static final.. remove static.
> --------------------------------------------------
>
>                 Key: CASSANDRA-2327
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2327
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.7.4, 0.7.5
>         Environment: JVM
>            Reporter: Vijay
>            Assignee: Vijay
>            Priority: Minor
>             Fix For: 0.7.5
>
>
> I see read and write latency spike when the system tables are flushing(according to opscentral)....

> Only reason which i can come-up with is probably because of the Table.flusherLock is
static final... i think it should not be static because the flush is per keyspace and this
lock will lock all the read operations because one table is going through a flush.

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