[
https://issues.apache.org/jira/browse/CASSANDRA-975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12877595#action_12877595
]
Matthew F. Dennis commented on CASSANDRA-975:
---------------------------------------------
sorry for the delay the tests take quite a while to run on my laptop and
CASSANDRA-1178 got in the way (these tests were run with the patch from
CASSANDRA-1178 applied).
Overall the new CLHM is just a bit slower in every test I ran (maybe I'm
running the wrong tests), reliably across multiple runs. In addition a cursory
glance at the memory usage in jconsole while the tests were running shows the
new CLHM using noticeably more memory; not a lot but it was noticeable, maybe
4-8 percent more.
I noticed no stability issues or crashes in any of the tests.
> explore upgrading CLHM
> ----------------------
>
> Key: CASSANDRA-975
> URL: https://issues.apache.org/jira/browse/CASSANDRA-975
> Project: Cassandra
> Issue Type: Task
> Reporter: Jonathan Ellis
> Assignee: Matthew F. Dennis
> Priority: Minor
> Fix For: 0.8
>
> Attachments: 0001-trunk-975.patch
>
>
> The new version should be substantially better "on large caches where many
> entries were readon large caches where many entries were read," which is
> exactly what you see in our row and key caches.
> http://code.google.com/p/concurrentlinkedhashmap/issues/detail?id=9
> Hopefully we can get Digg to help test, since they could reliably break CLHM
> when it was buggy.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
