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https://issues.apache.org/jira/browse/COUCHDB-3325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15926161#comment-15926161
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ASF GitHub Bot commented on COUCHDB-3325:
-----------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/couchdb-couch/pull/237
> Track _replicator/_user shards with LRU
> ---------------------------------------
>
> Key: COUCHDB-3325
> URL: https://issues.apache.org/jira/browse/COUCHDB-3325
> Project: CouchDB
> Issue Type: Bug
> Reporter: Robert Newson
>
> We excluded _replicator and _users databases from the LRU many years ago,
> before clustering.
> It is now possible to make many _replicator and _users databases (and
> clustering multiples this effect).
> A couchdb cluster can degrade considerably in the presence of many of these
> databases even when they are empty and idle. They consume resources but are
> never closed.
> Let's include all sys_db databases in the LRU. Any active ones will remain
> open anyway, that's the point of an LRU.
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