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Posted to user@cassandra.apache.org by Donna Li <do...@utstar.com> on 2011/06/10 09:28:50 UTC
about the virtual memory
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
Re: about the virtual memory
Posted by Jonathan Ellis <jb...@gmail.com>.
You should always disable swap on server machines.
On Fri, Jun 10, 2011 at 2:28 AM, Donna Li <do...@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