High Load and Low CPU & Memory

[Furnish, Trever G]

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

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

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

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.



> -----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
> 
> 
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