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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: about the virtual memory
Date Fri, 10 Jun 2011 12:55:14 GMT
You should always disable swap on server machines.

On Fri, Jun 10, 2011 at 2:28 AM, Donna Li <donna.li@utstar.com> wrote:
>
>
> Hello all:
>
> Does cassandra use swap size? why the physical memory is 1200932k free , but
> swap size is 31472k used. My cassandra server is 32 bit and DiskAccessMode
> is standard.
>
>
>
> top - 09:58:58 up 17 days, 17:54, 10 users,  load average: 0.05, 0.08, 0.08
>
> Tasks:  76 total,   2 running,  74 sleeping,   0 stopped,   0 zombie
>
> Cpu(s):  0.3% us,  0.0% sy,  0.0% ni, 95.3% id,  0.0% wa,  4.3% hi,  0.0% si
>
> Mem:   2074776k total,   873844k used,  1200932k free,   231872k buffers
>
> Swap:  3911736k total,    31472k used,  3880264k free,   386028k cached
>
>   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+
> COMMAND
>
> 27097 root      22   0  705m 146m 6368 S  0.3  7.2   0:18.48
> java
>
> 11984 root      16   0  382m  43m 2668 S  0.0  2.2   0:00.11
> psi
>
>  2430 root      19   0  408m  28m 3184 S  0.0  1.4   0:08.04
> java
>
> Best Regards
>
> Donna li



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com

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