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https://issues.apache.org/jira/browse/DERBY-5086?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen updated DERBY-5086:
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Attachment: disable-logging.diff
Attaching a patch that makes logging disabled by default. According to the
comments in the code, the logging was intended to be disabled before the
release.
Running regression tests.
> Disable istat logging by default
> --------------------------------
>
> Key: DERBY-5086
> URL: https://issues.apache.org/jira/browse/DERBY-5086
> Project: Derby
> Issue Type: Improvement
> Components: Services
> Affects Versions: 10.8.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Attachments: disable-logging.diff
>
>
> The automatic index statistics daemon will by default log what it's doing.
> That means messages like these ones will be written to derby.log during
> normal operation:
> Wed Mar 02 13:36:22 CET 2011 Thread[main,5,main] {istat} "APP"."T": update
> scheduled - 23ce809c-012e-7691-6c29-000003480128 reason=[no stats,
> row-estimate=36167] (queueSize=1)
> Wed Mar 02 13:36:22 CET 2011 Thread[index-stat-thread,5,main] {istat}
> "APP"."T": generating index statistics
> Wed Mar 02 13:36:23 CET 2011 Thread[index-stat-thread,5,main] {istat}
> "APP"."T": generation complete (509 ms)
> Wed Mar 02 13:36:23 CET 2011 Thread[main,5,main] {istat} stopping daemon,
> active=false, work/age=510/14736 [q/p/s=0/1/1,err:k/u/c=0/0/0,rej:f/d/o=0/0/0]
> Although these messages may be helpful in diagnosing bugs, they may also be a
> source of confusion since users probably only expect errors/problems to be
> logged by default. Also, for some workloads, large quantities of log may be
> produced and take up disk space. Therefore, I think we should disable the
> logging before the 10.8 release, and instead instruct users who experience
> problems to enable logging manually with the derby.storage.indexStats.log
> property.
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