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https://issues.apache.org/jira/browse/HBASE-11206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14003666#comment-14003666
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stack commented on HBASE-11206:
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bq. You think we should go this route?
Yes. We just added a feature that will help some in most use cases (all
on-heap) yet it is off by default. Turn it on so we start to get experience
with it and then improve as new context arrives (Next up would be offheap BC on
by default. Even here, meta blocks are onheap so could be pertinent in this
case even as is). Yeah, later, would be coolio if our ergonomics system
shifted offheap usage around... I suggest that a good ways out though (if at
all).
> Enable automagically tweaking memstore and blockcache sizes
> -----------------------------------------------------------
>
> Key: HBASE-11206
> URL: https://issues.apache.org/jira/browse/HBASE-11206
> Project: HBase
> Issue Type: Task
> Reporter: stack
> Assignee: stack
> Fix For: 0.99.0
>
>
> HBASE-5349
> "Automagically tweak global memstore and block cache sizes based on workload"
> adds a nice new feature. It is off by default. Lets turn it on for 0.99.
> Liang Xie is concerned that automatically shifting blockcache and memstore
> sizes could wreck havoc w/ GC'ing in low-latency serving situation -- a valid
> concern -- but lets enable this feature in 0.99 and see how it does. Can
> always disable it before 1.0 if a problem.
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