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https://issues.apache.org/jira/browse/HBASE-17204?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16260798#comment-16260798
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ramkrishna.s.vasudevan commented on HBASE-17204:
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bq. May be we should give a def value of 8 GB?
We should also add MaxDirectMemory as default now which is > 8G ( or what is
the default value we choose now).
> Make Bucket Cache off heap cache default ON
> -------------------------------------------
>
> Key: HBASE-17204
> URL: https://issues.apache.org/jira/browse/HBASE-17204
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 2.0.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Priority: Blocker
> Fix For: 2.0.0-beta-1
>
>
> L2 cache can be used for data blocks. By default it is off now. After
> HBASE-11425 work, L2 off heap cache can equally perform with L1 on heap
> cache. On heavy loaded workload, this can even out perform L1 cache. Pls see
> recently published report by Alibaba. Also this work was backported by
> Rocketfuel and similar perf improvement report from them too.
> Let us turn L2 off heap cache ON. As it is off heap, we can have much larger
> sized L2 BC. What should be the default size?
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