[CentOS] Load at 5, no CPU I/O or swap in use

Fri Aug 20 22:32:21 UTC 2010
James Hogarth <james.hogarth at gmail.com>

Ok let's see pf -efc if we can and see what is listed as in the run queue

On 20 Aug 2010 22:07, "Ed Donahue" <liberaled at gmail.com> wrote:
> On Fri, Aug 20, 2010 at 4:14 PM, Brian Mathis <brian.mathis at gmail.com>
wrote:
>> On Fri, Aug 20, 2010 at 2:48 PM, Ed Donahue <liberaled at gmail.com> wrote:
>>> We are currently running CentOS 5 update 4 on a Dell R910 server 16
>>> cores/32 hyperthreaded with 64GB of memory. It is our main Oracle 11g
>>> DB server for one of our customers and is attached to an MD 3000
>>> storage array. We are having a load averaging around 5 but see no swap
>>> in use, CPUs are pretty much idle and no I/O wait. We have Oracle
>>> dataguard turned on in transactional mode. I've checked everything
>>> that I can think of, there are no Oracle processes running which would
>>> cause a spike. Anyone have any ideas as to what to check next?
>>>
>>> I have another R910 configured the same way and do not see any issues
>>> with the 3 databases running on that server. The load is at .5.
>>
>> Do you have sar (sysstat) installed and running?  That will gather
>> stats 1x per minute on the server and you can see more than what a
>> typical 'top' will show you.  You can also graph the output using
>> ksar, which will make it easier to see things.
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>
> sar is showing a 99.6% idle cpu, this box only has an oracle db running on
it.
>
> It has dataguard which keeps it in sync with the DR server over a vpn.
>
> Here is vmstat output:
>
> procs -----------memory---------- ---swap-- -----io---- --system--
> -----cpu------
> r b swpd free buff cache si so bi bo in cs us sy id wa st
> 1 0 0 50057932 28332 13016296 0 0 1 6 0 0
> 0 0 100 0 0
> 0 0 0 50058992 28348 13016292 0 0 0 180 1172 2660
> 0 0 100 0 0
> 0 0 0 50059156 28356 13016300 0 0 0 192 1250 3071
> 0 0 100 0 0
> 0 0 0 50059988 28372 13016300 0 0 0 50 1221 3074
> 0 0 100 0 0
> 0 0 0 50060244 28380 13016292 0 0 0 126 1057 2578
> 0 0 100 0 0
>
> No processes in D status or zombies
>
> The NFS mounts are fine too, only two of them and they have users home
> directories and no one logged onto the system.
>
> It is also hooked up to a MD3000 where the db and oracle files are
> stored, the md3000 isn't showing any alerts.
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