incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Evgeniy Ryabitskiy <evgeniy.ryabits...@wikimart.ru>
Subject Re: Setting java heap size for Cassandra process
Date Tue, 20 Sep 2011 14:41:27 GMT
Thanks for reply. Now it looks much more clear.

Top shows this:
PID USER      PR  NI  VIRT  *RES*  SHR
67 cassandr  18     0  6267m *1.6g *  805m S  0.3 79.0  24:35.80
java

It's Ok with huge VIRT memory since it's 64 bit architecture.
But RES is keep growing.

And I still have questions:

1) If I don't have swap on node, then every mmap will add usage to my real
RES memory that is limited with 2GB?
2) Is there any way to limit mmap's RES memory usage?
3) Any common solution of problem when memory is out because of mmaps and
Cassandra process killed by OS?

I guess switching disk_access_mode to standard will solve this problem, but
it decrease performance.

Evgeny.

Mime
View raw message