Kevin,
It would be good to interogate system monitoring tools like 'sar' to see
what it is logging for CPU vs IO wait percentages. In general, high CPU
load is typically tied to processes / threads waiting for IO to occur. If
your disk is unable to keep up with raw IO or intensive metadata
operations, that could be the trouble.
Running 'top' will also show you if your processes are chewing actual CPU
or the load average is artificially high with IO wait being to blame.
daryl
On Wed, 23 Oct 2013, Tyle, Kevin R wrote:
A follow-up: the high CPU load was almost certainly linked to the ldm server
that was running. Once it was shut down, load dropped to close to 0. Upon
restart, load jumped back up to the vicinity of 20.00. I then shut down the
LDM and purged the data directories (which were very very large since no
scouring had been done). Restarting the LDM shows low system load so far. I
will enable LDM scouring and keep an eye on things.
_____________________________________________
Kevin Tyle, Systems Administrator
Dept. of Atmospheric & Environmental Sciences
University at Albany
Earth Science 235, 1400 Washington Avenue
Albany, NY 12222
Email: ktyle@xxxxxxxxxx<mailto:ktyle@xxxxxxxxxx>
Phone: 518-442-4578
_____________________________________________
From: awips2-users-bounces@xxxxxxxxxxxxxxxx
[mailto:awips2-users-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Tyle, Kevin R
Sent: Tuesday, October 22, 2013 11:00 AM
To: awips2-users@xxxxxxxxxxxxxxxx
Subject: [awips2-users] CPU load on EDEX/LDM server
Hi,
I am running an EDEX server, also running LDM, using the 13.2 version
that Michael has made available to us. It is on a CentOS5 platform,
32-bit, 16 CPU, 12 GB RAM. I am not running CAVE on this machine.
I regularly see an average load around 20.00, which seems excessive.
Lots of java, httpd, postmaster processes owned by user awips.
Does this load seem excessive? What do others see? If this load indeed seems
excessive, any ideas to troubleshoot?
Thanks,
Kevin
_____________________________________________
Kevin Tyle, Systems Administrator
Dept. of Atmospheric & Environmental Sciences
University at Albany
Earth Science 235, 1400 Washington Avenue
Albany, NY 12222
Email: ktyle@xxxxxxxxxx<mailto:ktyle@xxxxxxxxxx>
Phone: 518-442-4578
_____________________________________________
--
/**
* Daryl Herzmann
* Assistant Scientist -- Iowa Environmental Mesonet
* http://mesonet.agron.iastate.edu
*/
