High Load and Low CPU & Memory

[Troy Knabe]

On Mar 2, 2009, at 1:24 PM, Furnish, Trever G wrote:

> Do your iowait percentages go up in top?  Perhaps you have an
> i/o-related problem.

No, %wa is 0%

>
> Are your network cards running at the same duplex as your connected
> switch ports?

Yes they are 1000 Full Duplex

>
> Is kswapd busy (ie your system's thrashing) during the spikes?

No.

>
> You might get useful records by installing the sysstat package and  
> then
> configuring sar to run every minute, then using sar to report on the
> collected data.
>

sysstat is installed, but the spikes seem to be happening so quickly I  
can't get a read on it.  For instance, "top" is running and all of the  
sudden load average was 20, but cpu is 95% idle.


>
>
>> -----Original Message-----
>> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
>> bounces at redhat.com] On Behalf Of Troy Knabe
>> Sent: Monday, March 02, 2009 4:05 PM
>> To: Red Hat
>> Subject: High Load and Low CPU & Memory
>>
>> I have some brand new servers with 2 - Dual Core Xeons 3.33 Ghz and
>> 48Gb of RAM.  Intermittently they are spiking to high load averages  
>> 5+
>> or sometimes even 10+ and the application (oracle application server)
>> becomes unresponsive.  We are moving them from 2 - Dual Core Opterons
>> 2.4 Ghz and 12GB of RAM, and never experienced this type of
>> situation.  Can anyone give me some suggestions on where to start
>> looking?
>>
>> I am using Kerberos/LDAP authentication/authorization for the new
>> ones, but the ldap servers do not appear to be the issue.  The oracle
>> user is local to each server.
>>
>> Thanks
>> -Troy
>>
>>
>> --
>> redhat-list mailing list
>> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
>> https://www.redhat.com/mailman/listinfo/redhat-list
>
> -- 
> redhat-list mailing list
> unsubscribe mailto:redhat-list-request at redhat.com?subject=unsubscribe
> https://www.redhat.com/mailman/listinfo/redhat-list