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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-2069) Read repair causes tremendous GC pressure
Date Fri, 28 Jan 2011 16:17:43 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12988130#action_12988130
] 

Jonathan Ellis commented on CASSANDRA-2069:
-------------------------------------------

In the log snippets I saw the heap was legitimately nearly-full during the repair process.
 What does MAT show is using all the memory?

> Read repair causes tremendous GC pressure
> -----------------------------------------
>
>                 Key: CASSANDRA-2069
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2069
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.7.1
>            Reporter: Brandon Williams
>             Fix For: 0.7.2
>
>
> To reproduce: start a three node cluster, insert 1M rows with stress.java and rf=2. 
Take one down, delete its data, then bring it back up and issue 1M reads against it.  After
the run is done you will see at least 1 STW long enough to mark the node as dead, often 4
or 5.

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