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https://issues.apache.org/jira/browse/CASSANDRA-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486429#comment-13486429
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Vijay edited comment on CASSANDRA-4865 at 10/29/12 10:23 PM:
-------------------------------------------------------------
Attached patch includes the nit and updated tests.
re-ran the test on 32 cores and shows bigger diffrence.
||Open BS set's|Open BS get's|Open BS clear's|Offheap BS set's|Offheap BS
get's|Offheap BS clear's|
||593|495|658|408|132|392|
||606|479|749|394|130|556|
||542|452|736|394|130|554|
||543|460|736|395|129|555|
||542|452|736|391|129|554|
||541|465|735|391|129|555|
||542|454|737|392|129|555|
||541|452|736|391|130|554|
||542|452|735|391|129|554|
||542|452|736|391|130|554|
||542|519|736|391|130|554|
ran stress just for fun
before: aprox 2750/sec
after: aprox 2800/sec
Its a big win for a small change i guess :)
was (Author: vijay2...@yahoo.com):
Attached patch includes the nit and updated tests.
re-ran the test on 32 cores and shows bigger diffrence.
||Open BS set's|Open BS get's|Open BS clear's|Offheap BS set's|Offheap BS
get's|Offheap BS clear's|
||593|495|658|408|132|392|
||606|479|749|394|130|556|
||542|452|736|394|130|554|
||543|460|736|395|129|555|
||542|452|736|391|129|554|
||541|465|735|391|129|555|
||542|454|737|392|129|555|
||541|452|736|391|130|554|
||542|452|735|391|129|554|
||542|452|736|391|130|554|
||542|519|736|391|130|554|
ran stress just for fun
before: aprox 2750
after: aprox 2800
Its a big win for a small change i guess :)
> Off-heap bloom filters
> ----------------------
>
> Key: CASSANDRA-4865
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4865
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Vijay
> Fix For: 1.2.1
>
> Attachments: 0001-CASSANDRA-4865.patch, 0001-CASSANDRA-4865-v2.patch
>
>
> Bloom filters are the major user of heap as dataset grows. It's probably
> worth it to move these off heap. No extra refcounting needs to be done since
> we already refcount SSTableReader.
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