[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[LDM #VPY-764086]: Performance issues > 6.6.0

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [LDM #VPY-764086]: Performance issues > 6.6.0
  • Date: Sun, 08 Apr 2007 11:54:41 -0600
Daryl,

> I hope this isn't a goose chase, but I'm seeing an increased server load
> when running anything newer than 6.6.0 on my primary IDD node
> (pircsl4.agron.iastate.edu).  Normally, the server runs at a load average
> of about 2-3 with rare spikes to 3-4 running GFS relay.
> 
> With 6.6.3, the load average is consistantly above 3-4 and normally around
> 6-7 during GFS relay.  I noticed this with 6.6.2 as well.
> 
> Any ideas on how to diagnose what is going on?  I've been looking at
> sysstat output and only see a slight increase in system% time.
> 
> System is a dual Xeon on Redhat Enterprise 4 (2.6.9-42.0.3.ELsmp)
> 
> The actual relay of data doesn't seem to be affected as far as I can tell.
> I could just turn up my system monitoring alert to cut down on the load
> average emails :)
> 
> thanks and sorry,
> daryl

I installed 6.6.3 on both a Linux 2.6.17 and Linux 2.6.18 system
here.  The load average didn't change on the 2.6.17 system but did
increase by about 2 on the 2.6.18 system.  I'll have to investigate
further.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: VPY-764086
Department: Support LDM
Priority: Normal
Status: On Hold