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Posted to commits@cassandra.apache.org by "John Watson (JIRA)" <ji...@apache.org> on 2012/10/09 21:24:02 UTC
[jira] [Commented] (CASSANDRA-4673) Compaction of HintsColumnFamily
stucks
[ https://issues.apache.org/jira/browse/CASSANDRA-4673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13472656#comment-13472656 ]
John Watson commented on CASSANDRA-4673:
----------------------------------------
We also experienced this issue on SSDs and after reading CASSANDRA-4492 and CASSANDRA-4182
Turned off {{multithread_compaction}} and this issue went away
> Compaction of HintsColumnFamily stucks
> --------------------------------------
>
> Key: CASSANDRA-4673
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4673
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 1.1.1
> Environment: We've got a 24 nodes cluster with 3 virtual data centers. We've got 7 nodes with SSD drives. We are operating under very heavy read/write load. We typically seeing CPU usage >90% on our machines.
> We are using 1.1.2 - why this version is not listed in the 'Affected Version' drop down?
> Reporter: Bartłomiej Romański
>
> On some nodes the compaction of HintsColumnFamily stucked. Here is a typical output of 'nodetool compactionstats':
> pending tasks: 1
> compaction type keyspace column family bytes compacted bytes total progress
> Compaction systemHintsColumnFamily 346205828 346909662 99.80%
> Active compaction remaining time : 0h00m00s
> Rebooting a node does not help. The compaction starts immediately after booting and stucks and the same point.
> If this can be related we are also expiring a problem described in CASSANDRA-4639.
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