[mapserver-users] Major MapServer Performance Problem on SunSolaris 10 64bit

[Nolte, Tim]

John,

I am very glad that you have brought this up. We are currently running
our MapServer on Solaris 10 x86 and I believe we are running it as 32bit
but I can't actually say for sure, I just used standard compile
instructions. We're running on two 3GHz Xeons. I have had many
complaints concerning the performance of the server and haven't even
considered that MapServer might be the culprit. We have both shapefile
and Oracle Spatial data sources. We've always had the server running
under Solaris 10 x86 so haven't even compared it to running under a
different OS. I am very interested to hear any feedback on this subject
as I may have to look at moving to Linux as my OS to get the performance
gains I need.

- Tim

----
Timothy J Nolte - tnolte at ilpcs.com
Network Planning Engineer

iPCS Wireless, Inc.
4717 Broadmoor Ave, Suite G
Kentwood, MI 49512

Office: 616-656-5163
PCS:    616-706-2438
Fax:    616-554-6484
Web: www.ipcswirelessinc.com

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of John
Westwood
Sent: Friday, June 12, 2009 11:51 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Major MapServer Performance Problem on
SunSolaris 10 64bit

Hi,

We have been developing an application with MapServer as the backend. We
developed it on an SLES Linux box, we are now setting it up on the Sun
Solaris 10 production server. Unfortunately, the performance of
MapServer on the production machine is very slow, considerably slower
than the Linux development machine (which is much less powerful). The
performance problem is particularly pronounced when serving vector
PostGIS layers (OpenStreetMap), but it is also noticeably slow when
serving rasters.

We have tested PostGIS, this is fast and therefore no the problem. I
have looked at the MapServer debug file at debug level 5 and this does
not reveal much, except that both the total msDrawMap() time and the
mapserv request processing time are slow. So, MapServer seems to be slow
across the board. The Apache log file also confirms that the MapServer
requests are slow.  

Originally, we had MapServer compiled as 64bit and Apache as 32bit, we
thought that maybe this could be the problem. So, we compiled Apache for
64bit - but has not made any difference. We are considering using 32bit
Apache and 32bit MapServer but we are not sure if it will fix the
problem.

Does anybody have any ideas on what the problem could be or how we could
go about diagnosing it? We would greatly appreciate any advice.

Regards,

John Westwood
Great Britain Historical GIS Project
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