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https://issues.apache.org/jira/browse/HBASE-823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack resolved HBASE-823.
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Resolution: Won't Fix
This issue has gone stale. We no longerr use MapFiles and while we should
probably bound the set of HFiles open in the regionserver, the number of
concurrent open resources has come down a good bit since this issue was opened
and we'll likely go other routes to conserve datanode resource usage (nio)
before we put back an upper limit on hfiles open.
> Concurrent "open mapfile reader" limit
> --------------------------------------
>
> Key: HBASE-823
> URL: https://issues.apache.org/jira/browse/HBASE-823
> Project: Hadoop HBase
> Issue Type: Improvement
> Reporter: stack
>
> Over in HBASE-745, Luo Ning profiling found that the number of open Readers
> has direct impact on memory used. This issue is about putting an upper bound
> on the number of open Readers doing something like a bounded pool w/ a LRU
> eviction policy.
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