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https://issues.apache.org/jira/browse/HBASE-9869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13821378#comment-13821378
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stack commented on HBASE-9869:
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See any difference? Whats the math like? How large is the Map if 1M regions
in it? We remove when region is bad but ones we don't access could stick
around for ever. I suppose that serves us right if we don't access them. Folks
like Lars are sensitive about clients being well-behaved especially when
embedded in an apps server. I looked around for a simple LRU -- the guava one
-- but we need SortedMap.
> Optimize HConnectionManager#getCachedLocation
> ---------------------------------------------
>
> Key: HBASE-9869
> URL: https://issues.apache.org/jira/browse/HBASE-9869
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 0.98.0, 0.96.0
> Reporter: Nicolas Liochon
> Assignee: Nicolas Liochon
> Fix For: 0.98.0, 0.96.1
>
> Attachments: 9869.v1.patch
>
>
> It javadoc says: "TODO: This method during writing consumes 15% of CPU doing
> lookup". This is still true, says Yourkit. With 0.96, we also spend more time
> in these methods. We retry more, and the AsyncProcess calls it in parallel.
> I don't have the patch for this yet, but I will spend some time on it.
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