Load avg issue

[nilesh vaghela]

This happens sometimes lets say once in 3 days or may be some time once in
week.

Let me try to increase the ram.

[root at mailserver root]# free -m
             total       used       free     shared    buffers     cached
Mem:          1000        984         16          0         37        593
-/+ buffers/cache:        353        647
Swap:         1953        316       1636


On 4/13/07, Andrei Pascal <andrei at romsym.ro> wrote:
>
> On Fri, 2007-04-13 at 01:15 -0400, nilesh vaghela wrote:
> > We have mail server running with sendmail, horde with front end and
> around
> > 350 users.
> >
> > Some time the server indicate very high cpu usage.
> >
> > What is to be ckeck
> >
> > We are using RHEL3.
> >
> >
> >  10:49:11  up 91 days, 18:55,  3 users,  load average: 11.93, 15.27,
> 13.87
> > 259 processes: 254 sleeping, 4 running, 1 zombie, 0 stopped
> > CPU states:  cpu    user    nice  system    irq  softirq  iowait    idle
> >            total   66.8%    0.0%   13.2%   0.4%     0.0%  118.8%    0.0%
> >            cpu00   39.9%    0.0%    7.5%   0.5%     0.1%   51.6%    0.0%
> >            cpu01   27.0%    0.0%    5.7%   0.0%     0.0%   67.1%    0.0%
> > Mem:  1024780k av, 1008968k used,   15812k free,       0k shrd,   13764k
> > buff
> >                     749248k actv,  143504k in_d,   14280k in_c
> > Swap: 1999992k av,  437476k used, 1562516k free                  558700k
> > cached
> > --------------
> > [root at mailserver root]# ps -el | grep imap | wc -l
> >     109
> > -----------------
>
> The "iowait" field in the CPU usage status means your processess are
> waiting for some data. Check you disk and network latency. 1 GB RAM
> should do it, but your swap is bieng hit quite hard. Check vmstat for si
> and so (swap in / swap out) - I think that's where youp problem is.
>
> Try stopping unnecessary services or simply add an extra GB of RAM to
> that machine.
>
>
> Regards,
> Andrei
>
>
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-- 
Nilesh Vaghela
ElectroMech
Redhat Channel Partner and Training Partner
74, Nalanda Complex, Satellite Rd, Ahmedabad
25, The Emperor, Fatehgunj, Baroda.
www.electromech.info