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https://issues.apache.org/jira/browse/SOLR-11453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484356#comment-16484356
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Shawn Heisey commented on SOLR-11453:
-------------------------------------
I have been having a severe lack of free time lately. Haven't had a chance to
look at the latest. Feel free to take over!
Because of the duplicate logging that would result if we don't log the slow
logger to a separate log by default, i think it should default to a separate
file.
Something I'm thinking about for a separate issue: Offer an option (not
enabled by default) that would send all of the standard request logging
(org.apache.solr.core.SolrCore.Request) to a separate file. I think might
significantly reduce the overall size of the main solr.log.
> Create separate logger for slow requests
> ----------------------------------------
>
> Key: SOLR-11453
> URL: https://issues.apache.org/jira/browse/SOLR-11453
> Project: Solr
> Issue Type: Improvement
> Components: logging
> Affects Versions: 7.0.1
> Reporter: Shawn Heisey
> Assignee: Shawn Heisey
> Priority: Minor
> Attachments: SOLR-11453.patch, SOLR-11453.patch, SOLR-11453.patch,
> SOLR-11453.patch, slowlog-informational.patch, slowlog-informational.patch,
> slowlog-informational.patch
>
>
> There is some desire on the mailing list to create a separate logfile for
> slow queries. Currently it is not possible to do this cleanly, because the
> WARN level used by slow query logging within the SolrCore class is also used
> for other events that SolrCore can log. Those messages would be out of place
> in a slow query log. They should typically stay in main solr logfile.
> I propose creating a custom logger for slow queries, similar to what has been
> set up for request logging. In the SolrCore class, which is
> org.apache.solr.core.SolrCore, there is a special logger at
> org.apache.solr.core.SolrCore.Request. This is not a real class, just a
> logger which makes it possible to handle those log messages differently than
> the rest of Solr's logging. I propose setting up another custom logger
> within SolrCore which could be org.apache.solr.core.SolrCore.SlowRequest.
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