Need your help about Memcache!

[Jeffrey Ng]

 04:45:06  up 54 days, 13:44,  3 users,  load average: 0.45, 0.38, 0.53
78 processes: 77 sleeping, 1 running, 0 zombie, 0 stopped
CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
           total   10.0%    0.0%    3.6%   0.4%     1.6%    7.6%  376.0%
           cpu00    7.5%    0.0%    2.6%   0.4%     1.9%    2.4%   84.8%
           cpu01    0.0%    0.0%    0.2%   0.0%     0.0%    0.2%   99.5%
           cpu02    1.9%    0.0%    0.4%   0.0%     0.0%    2.9%   94.6%
           cpu03    0.2%    0.0%    0.0%   0.0%     0.0%    2.2%   97.5%
Mem:  3113604k av, 2726528k used,  387076k free,       0k shrd,  199908k
buff
      1832240k active,             533308k inactive
Swap: 4192956k av,  521156k used, 3671800k free                  771504k
cached

  PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME CPU COMMAND
 4523 memcache  16   0  243M 242M   432 S     3.9  7.9   1:54   1 memcached
 6881 root      16   0 36828  23M  5296 S     0.2  0.7   0:20   0 httpd
 6815 root      16   0  1768  692   524 S     0.0  0.0   0:00   2 syslogd
 6840 root      16   0  3272 1384  1160 S     0.0  0.0   0:01   2 sshd
 6854 qmails    16   0  1616  360   292 S     0.0  0.0   0:01   0 qmail-send
 6855 qmaild    16   0  1640  492   440 S     0.0  0.0   0:00   1 tcpserver
 6857 qmaill    16   0  1584  424   368 S     0.0  0.0   0:00   1 splogger
 6858 root      18   0  1584  300   244 S     0.0  0.0   0:00   2
qmail-lspawn
 6859 qmailr    16   0  1584  332   276 S     0.0  0.0   0:00   2
qmail-rspawn
 6860 qmailq    16   0  1576  316   260 S     0.0  0.0   0:00   3
qmail-clean
 6890 root      16   0  1632  600   528 S     0.0  0.0   0:00   0 crond


here's our top results. what other information will be helpful for you to
help us?

Jeffrey

On 2/6/06, Marcel Holan <mh at petamem.com> wrote:
>
> On Mon, Feb 06, 2006 at 05:11:06PM +0800, Jeffrey Ng wrote:
> > I am the coworker of Swansun. We are currently running apache and
> memcache
> > on the same machine. Maybe sometimes apache would use more RAM than it
> > should. Will that cause the problem swansun talked about? And how should
> we
> > prevent that kind of problem when we have apache and memcache on the
> same
> > VPS?
>
> Without some more quantitative information, help is difficult. Of course,
> the
> machine has to have enough ram for both apache as well as memcached and
> evtl. other processes running there. by forcing it to swap, all benefits
> from
> a fast RAM-retrieval (of precomputed data) are gone.
>
> Never forget, there's almost always a space/speed tradeoff.
>
> --
> best regards
>   Marcel Holan
>
> project manager R&D
>
> +----------------------------------------------------------------------------+
> PetaMem s.r.o., Ocelarska 1, 190 00 Praha, Czech Republic -
> www.petamem.com
>
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