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

[Umberto Nicoletti]

I am not a Solaris expert, but if you are running mapserver as a CGI,
Linux will almost surely be faster because of its (notoriously?) lower
process creation cost.
Now I don't have actual numbers to back this argument but a quick
google reveals this thread on Sun forums:

http://forums.sun.com/thread.jspa?threadID=5207554&tstart=3344

http://archives.postgresql.org/pgsql-hackers-win32/2003-11/msg00044.php
(third para).

A solution would be using mapserver as a FastCGI.

HTH,
Umberto


On Fri, Jun 12, 2009 at 6:28 PM, Nolte,
Tim<Tim.Nolte at ipcswirelessinc.com> wrote:
> 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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