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https://issues.apache.org/jira/browse/COUCHDB-1409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207863#comment-13207863
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Paul Joseph Davis commented on COUCHDB-1409:
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Was just about to say that we have seen a couple places with similar behavior
and similar results in BigCouch. Specifically couch_os_process pids can have
this effect. The article is missing the underlying reason but the HN comment is
close enough. Simple fix is to call erlang:garbage_collect() when processes are
returned. I think there might be a few other places we do similar things but
nothing as significant as a couchjs processes.
Also, its possible that this might not be much of an issue for CouchDB.
BigCouch deployments can run in the hundreds to a thousand or so couchjs
processes so it was a bit more of an issue with those pids stealing RAM when
they went idle. If the total number is smaller and they're reused quite quickly
then this issue shouldn't manifest, or at least not as drastically.
> Look into manual GC
> -------------------
>
> Key: COUCHDB-1409
> URL: https://issues.apache.org/jira/browse/COUCHDB-1409
> Project: CouchDB
> Issue Type: Improvement
> Reporter: Jan Lehnardt
>
> This just as a reminder to consider
> http://andy.wordpress.com/2012/02/13/erlang-is-a-hoarder/ (incl. comments)
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