[mapserver-users] is mapserver on windows slower ???

[Ed McNierney]

Gregor -

The current release of MapServer is not multi-threaded, and will only run on one processor at a time.  If you're serving multiple requests, then your dual-processor machine can serve two of them at the same time.  But a single request will only use one processor, as in your test; that's why you see half as much total processor utilization on a machine with twice as many processors.

If you're running on absolutely identical machines, there's no particular reason why (in general) MapServer on Linux would be noticeably faster or slower than on Windows.  Since you're seeing different performance I would guess that there is either a different amount of RAM in the two machines and/or a difference in the hardware or configuration of the disk system.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
ed at topozone.com
(978) 251-4242 

-----Original Message-----
From: Gregor Friedrich [mailto:gregor at hdg.ufz.de]
Sent: Wednesday, June 26, 2002 12:11 PM
To: mapserver-users at lists.gis.umn.edu
Subject: [mapserver-users] is mapserver on windows slower ???


Hi there,

If am testing the same map services with identical data sources (shapefiles 
with *.qix index)  one serving on Linux (SUSE 7.3, Apache 1.3.19... self 
compiled binary ) the other one on Win2k Server with IIS 5.0 etc, 
downloaded binary ) , the Win machine have 2 Pentium II  300 Mhz each, the 
Linux box just one Pentinum II 300 Mhz . I had  expected that the WIn2k box 
is 2 times faster around than the Linux box , but the win box needs more 
time to build the maps. The service on Linux needs 20 seconds (64000 
polygons !) to start up , the windows service 30 s . On Linux mapserv 
processes consume > 90 % of processor power, on windows only 50 - 54 % , it 
seems that the parallelizing is n't so good , is n't it ?

greetings from germany

Gregor