[mapserver-users] MapServer 5.2.1 performance

[Andy Colson]

Wow...  Yeah, I totally missed that.  I need to stop drinking the heavy 
liquor in the morning. :-)

-Andy

Christopher Schmidt wrote:
> On Wed, Sep 02, 2009 at 09:10:54AM -0500, Andy Colson wrote:
>>> * I see that most of the layers spent around 0,015 seconds for each. Some layers spent around 0.25 seconds and I could see that these layers have few geometries very complex (I try to break these geometries in others simpler)
>> As I see it, you have two options:
>>
>> 1) Make an individual request faster (hard to do)
>> 2) Reduce the number of requests (easier, and different options)
>>
>> Do you really need all 120 layers?  For one tile you have to make 120  
>> requests.  If it takes 4 tiles to fill out your map, thats 4 * 120 = 480  
>>  requests.  If you could combine a few layers you would reduce the  
>> number of requests, and improve performance.
> 
> Er, I think your'e confused. His *mapfile* has 120 layers -- 40 of which
> are 'within range', 80 of which are not, and he's putting those
> 40 layers into one tile. (This is large, but not excessive; the Boston 
> Freemap had something like 60 layers, and was a pretty simple map, all
> things considered.)
> 
> I could be reading this wrong, but I think you're misunderstanding the
> problem.
> 
> -- Chris
> 
> 
>> Have you tried using multiple urls in OpenLayers?
>>
>> see:
>> http://openlayers.org/dev/examples/multiserver.html
>>
>> Have you used firebug to watch it load?  It has a nice pretty graph that  
>> shows which requests are concurrent, the time for each, etc, etc.
>>
>> If you can switch any of your layers to load as a single tile that would  
>> also cut down the number of requests (from 4 to 1 in the example above).
>>
>>
>> -Andy
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>