[mapguide-users] map refresh timeout

[Jonathan Manafi]

I have narrowed it down to 2 of our layers, where when they are 
available, the ajax viewer seems to hang at small zooms, or there 
becomes a horrendous memory leak, where the smaller the scale becomes, 
the more memory is consumed by mgserver.exe. The most I witnessed turned 
out to be around 1.2 GB of memory consumed.  With these two layers off, 
I can zoom down to 1:.001 with no problems. Both of these layers have 
line styles, and one has a single label at a particular zoom level, but 
they are both sparse compared to a couple of other layers that have 
multiple line styles and/or labels.  All of our data being applied is 
.SDF files.


Traian Stanev wrote:
> Try identifying which layer causes the slow down, by selectively turning off layers. Then see what's peculiar about the layer -- does it have a line style, or perhaps labeling. There is a known issue around that (layers with lots of labels at high zoom), which will be fixed very soon.
>
> Traian
>
>
>   
>> -----Original Message-----
>> From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-
>> bounces at lists.osgeo.org] On Behalf Of Jonathan Manafi
>> Sent: Monday, February 25, 2008 12:54 PM
>> To: MapGuide Users Mail List
>> Subject: Re: [mapguide-users] map refresh timeout
>>
>> As an update:
>>
>> We began testing our data upgrading to MGOS 2.0 RC4 without using the
>> fusion library, and we are noticing the same issues. The AGG renderer
>> actually causes mgserver.exe to lock up at small zoom scales; today it
>> happened at 1:254, whereas the GD renderer has yet to lock up, but it
>> still takes a good period of time to update the map extents. Compared
>> to
>> MGOS 1.2 with the same dataset, both renderers perform worse when
>> zoomed
>> to a small scale, where, otherwise, they take only split seconds to
>> update when zoomed far out.
>>
>> Has anyone seen this behavior with their data, as this could be a
>> necessary function for our clients?
>>
>>
>> J Manafi wrote:
>>     
>>> I have experienced extremely long refresh rates when the zoom scale
>>>       
>> is really
>>     
>>> low (~1:33 or so). The time it takes to refresh for the Sheboygan
>>>       
>> example is
>>     
>>> at least 10x normal, and on a custom map, MapGuide server pretty much
>>>       
>> hangs
>>     
>>> at ~1:236 (currently sitting and waiting). Has anyone else noticed
>>>       
>> this
>>     
>>> behavior at low scales?
>>>
>>>       
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