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Posted to commits@cassandra.apache.org by Apache Wiki <wi...@apache.org> on 2010/06/30 04:04:11 UTC
[Cassandra Wiki] Update of "PerformanceTuning" by JonathanEllis
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The "PerformanceTuning" page has been changed by JonathanEllis.
http://wiki.apache.org/cassandra/PerformanceTuning?action=diff&rev1=2&rev2=3
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+ Useful JVM options:
+
+ -XX:+UseCompressedOops (for Sun JVM)
+ -Xcompressedrefs (for IBM)
+
+ Compressed references (aka OOPs = ordinary object pointers) are not stable for Sun JVM versions before 6u19.
+
todo: describe how top, iostat -x, and JMX stats can help you see what is making things slow
For starters, see "[[http://spyced.blogspot.com/2010/01/linux-performance-basics.html|Linux Performance Basics for Cassandra]]".