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https://issues.apache.org/jira/browse/HBASE-8894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803923#comment-13803923
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Alex Feinberg commented on HBASE-8894:
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Hi [~xieliang007]
This configuration creates way too memory pressure. I'd also suggest using
Java7 (this is the setup that I used at FB).
I'll try to come up with actual JVM options I used, but I used:
- Total JVM heap size: ~14gb (Xmx and Xms)
space available to the l1 cache (the regular block cache): 0.4-0.5 (we have
never went above 0.5 as that caused too many problems)
- New gen size: 4gb (I *think*, not too sure)
- Direct memory: 10gb (I am roughly scaling down to your machine -- you want to
leave some memory available to OS)
- I gave 0.9% of direct memory to the L2 cache
I did use CMS, but I don't remember the CMS initiating ratio. G1 might also work
I will try to find the exact JVM configuration
How much memory did you give to memstore?
Thanks!
- af
> Forward port compressed l2 cache from 0.89fb
> --------------------------------------------
>
> Key: HBASE-8894
> URL: https://issues.apache.org/jira/browse/HBASE-8894
> Project: HBase
> Issue Type: New Feature
> Reporter: stack
> Assignee: Liang Xie
> Priority: Critical
> Attachments: HBASE-8894-0.94-v1.txt, HBASE-8894-0.94-v2.txt
>
>
> Forward port Alex's improvement on hbase-7407 from 0.89-fb branch:
> {code}
> 1 r1492797 | liyin | 2013-06-13 11:18:20 -0700 (Thu, 13 Jun 2013) | 43 lines
> 2
> 3 [master] Implements a secondary compressed cache (L2 cache)
> 4
> 5 Author: avf
> 6
> 7 Summary:
> 8 This revision implements compressed and encoded second-level cache with
> off-heap
> 9 (and optionally on-heap) storage and a bucket-allocator based on
> HBASE-7404.
> 10
> 11 BucketCache from HBASE-7404 is extensively modified to:
> 12
> 13 * Only handle byte arrays (i.e., no more serialization/deserialization
> within)
> 14 * Remove persistence support for the time being
> 15 * Keep an index of hfilename to blocks for efficient eviction on close
> 16
> 17 A new interface (L2Cache) is introduced in order to separate it from the
> current
> 18 implementation. The L2 cache is then integrated into the classes that
> handle
> 19 reading from and writing to HFiles to allow cache-on-write as well as
> 20 cache-on-read. Metrics for the L2 cache are integrated into
> RegionServerMetrics
> 21 much in the same fashion as metrics for the existing (L2) BlockCache.
> 22
> 23 Additionally, CacheConfig class is re-refactored to configure the L2
> cache,
> 24 replace multile constructors with a Builder, as well as replace static
> methods
> 25 for instantiating the caches with abstract factories (with singleton
> 26 implementations for both the existing LruBlockCache and the newly
> introduced
> 27 BucketCache based L2 cache)
> 28
> 29 Test Plan:
> 30 1) Additional unit tests
> 31 2) Stress test on a single devserver
> 32 3) Test on a single-node in shadow cluster
> 33 4) Test on a whole shadow cluster
> 34
> 35 Revert Plan:
> 36
> 37 Reviewers: liyintang, aaiyer, rshroff, manukranthk, adela
> 38
> 39 Reviewed By: liyintang
> 40
> 41 CC: gqchen, hbase-eng@
> 42
> 43 Differential Revision: https://phabricator.fb.com/D837264
> 44
> 45 Task ID: 2325295
> 7 ------------------------------------------------------------------------
> 6 r1492340 | liyin | 2013-06-12 11:36:03 -0700 (Wed, 12 Jun 2013) | 21 lines
> {code}
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