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<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009>I made some
tests by letting JMeter run a few thousand WMS GetMap requests with varying BBOX
and WIDTH and HEIGHT parameter. I tested three
alternatives:</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=736370708-18122009></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009>MS4W 2.2.8 and
Mapserver 5.2.1</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009>MS4W 3.0 beta 7 and
Mapserver 5.6.0 as cgi</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009>MS4W 3.0 beta 7 and Mapserver 5.6.0 a
fcgi</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009>Server is Windows 2003 server with 8 cores and fast
disks. I configured JMeter to use 20 threads</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009>I feel I was able to get fcgi running by following
the instructiuons of MS4W README_INSTALL document. I believe it is
convinced by a) calls addressed to /fcgi-bin/mapserv.exe
work and b) after receiving an image from WMS service the process remains
on the server for some time. </SPAN></SPAN></FONT><FONT face=Arial size=2><SPAN
class=736370708-18122009><SPAN class=736370708-18122009>However, all these three
alternatives are giving me about the same speed that is 5 images
per second or 500 KB/sec with jpeg output. Bandwidth is not the limiting
factor because with 24-bit png output I get a throughput of 4400 KB/sec.
It looks like I am having some base load in my system that
takes about 150 milliseconds per each successful WMS request and using
fcgi does not help in my case.</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009>Can anybody suggest why my server is so much slower
than the one used in Mapserver/Geoserver shootout <A
href="http://www.slideshare.net/gatewaygeomatics.com/wms-performance-shootout">http://www.slideshare.net/gatewaygeomatics.com/wms-performance-shootout</A> and
why I do not get any advantage from using Fast-CGI? Could it
be because my tileindex shapefile is rather large with more than 11000
polygons? Images themselves are processed in a standard Mapserver way
and they are uncompressed, tiled geotiffs with external uncompressed
overviews. Some evidence about tileindex handling eating time is that I
can get double speed with 10 images per second from a single ecw file
but this test is not very comparable because my ecw file is black
and white and not 3-channel as my geotiff layer.</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT><FONT face=Arial size=2><SPAN
class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009>-Jukka Rahkonen-</SPAN></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=736370708-18122009><SPAN
class=736370708-18122009></SPAN></SPAN></FONT> </DIV></BODY></HTML>