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From "Robert Newson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COUCHDB-1569) Low diskspace warning for compaction should be logged at error level
Date Thu, 25 Oct 2012 21:09:15 GMT

    [ https://issues.apache.org/jira/browse/COUCHDB-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484483#comment-13484483
] 

Robert Newson commented on COUCHDB-1569:
----------------------------------------

I've been pondering this on and off today. There are other conditions in the compaction daemon
that might warrant ERROR level, like when it cancels a compaction because the time period
it's allowed to run is has expired. Manually started compactions that would consume all remaining
disk space will *not* log at ERROR if you start them either.

So, on reflection, I think this is really an INFO level thing after all (if only because we
can't make it ERROR level with any consistency).

What's truly missing is the ability to change log levels by module. i.e, I'd like to see INFO
level from couch_compaction_daemon but not from couch_httpd.
                
> Low diskspace warning for compaction should be logged at error level
> --------------------------------------------------------------------
>
>                 Key: COUCHDB-1569
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-1569
>             Project: CouchDB
>          Issue Type: Improvement
>          Components: Database Core
>    Affects Versions: 1.2
>            Reporter: Nils Breunese
>            Priority: Trivial
>             Fix For: 1.3
>
>         Attachments: patch.txt, patch_updated.txt
>
>
> In production we're running CouchDB at log level 'error', because running at 'info' is
too verbose for production. We suspect automatic compaction might not be running due to low
diskspace. 
> http://wiki.apache.org/couchdb/Compaction#Automatic_Compaction says: "When there's not
enough free disk space to compact a particular database or view index, a warning message is
logged." But there is no warning log level in CouchDB as far as I know and the can_db_compact
function in src/couchdb/couch_compaction_daemon.erl seems to log the message about diskspace
being too low at info level. Could this be changed to error level?

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