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Posted to commits@activemq.apache.org by "Hiram Chirino (JIRA)" <ji...@apache.org> on 2012/08/17 18:33:37 UTC
[jira] [Commented] (APLO-245) The LevelDB store does not seem to
get cleaned/compacted
[ https://issues.apache.org/jira/browse/APLO-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13436841#comment-13436841 ]
Hiram Chirino commented on APLO-245:
------------------------------------
This is normal. LevelDB indexes are quite lazy about compacting but they do eventually compact. But perhaps we should add an option to let admins force a compaction.
> The LevelDB store does not seem to get cleaned/compacted
> --------------------------------------------------------
>
> Key: APLO-245
> URL: https://issues.apache.org/jira/browse/APLO-245
> Project: ActiveMQ Apollo
> Issue Type: Bug
> Reporter: Lionel Cons
>
> We use the default message store: LevelDB.
> On one broker with poor performance, we noticed a quite big store (file system wise) while there are zero messages in the queues.
> In concrete terms, the REST API reports for the aggregated dest-metrics:
> 'queue_items' => 0,
> 'queue_size' => 0,
> While on the box itself, in the data directory, we see:
> $ du -ks .
> 434992 .
> $ find . -type f | wc -l
> 471
> So 400MB and 471 files is a lot to hold zero messages...
> FWIW, the store page in the console reports something quite different:
> disk usage: 760.689 mb
> Log Status
> Log File | Msg Refs | File Size
> 0000003a0eb4031b.log | 0 | 100.000 mb
> Index recovery starts from log position: 0000003a0eb4031b
> Append position: 0000003a13bed684
> Index Status
> Compactions
> Level Files Size(MB) Time(sec) Read(MB) Write(MB)
> --------------------------------------------------
> 0 0 0 0 0 2
> 1 7 9 2 12 9
> 2 108 91 0 0 0
> 3 114 227 0 0 0
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