[mapserver-users] mapserver defunct

[Wim Vanbelle]

Well, the problem is that the requests are not always served.

During load testing, say about 10 concurrent requests I also load the map.
But there are randomly tiles that are never loaded. I thought this would be
related to the defunct processes, but that is not a certainty.

My setup is lighttpd + fastcgi.
To be honest I'm in a pretty bad situation now, considering we go live with
this in 9 days.

Not sure what else I can do honestly.


On 11 January 2011 19:05, Stephen Woodbridge <woodbri at swoodbridge.com>wrote:

> Here is an explanation of defunct processes:
>
> http://www.webmasterworld.com/forum40/1032.htm
>
> I'm sure there are others. So since you are running fastcgi, it is the
> responsibility of the fastcgi parent process to clean up dead child
> processes. It is likely that it is busy because you are doing load testing
> or there is some subtle issue that is occurring. If you are getting good
> responses from mapserver, you probably do not need to worry about it unless
> you are getting tons of them.
>
> If you are using apache, I believe there is a parameter that you can set
> for fastcgi processes which will let them die after N requests. This should
> clean those up and apache will spawn a new process if needed to replace the
> that died.
>
> -Steve W
>
>
> On 1/11/2011 10:04 AM, Wim Vanbelle wrote:
>
>> Hi all,
>>
>> I'm getting a lot of
>>
>> 27098 x  20   0     0    0    0 Z    1  0.0   0:00.03 mapserv <defunct>
>> 27104 x  20   0     0    0    0 Z    1  0.0   0:00.03 mapserv <defunct>
>>
>> while load testing mapserver. Is there any way I can go about checking
>> out why this is happening? Especially when doing concurrency tests it
>> seems to go sideways.
>>
>> Currently i'm using :
>>
>> MapServer version 5.6.5 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP
>> OUTPUT=SWF OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE
>> SUPPORTS=ICONV SUPPORTS=FRIBIDI SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT
>> SUPPORTS=WFS_SERVER SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER
>> SUPPORTS=SOS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS SUPPORTS=GEOS
>> SUPPORTS=RGBA_PNG INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL
>> INPUT=SHAPEFILE
>>
>> using FastCGI/Lighty.
>>
>> Do note that the mapfile itself seems to be fine, since it does render
>> content when i'm the single user using it.
>>
>> Thanks for your expert insight :D.
>>
>>
>>
>> _______________________________________________
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>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>
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