[mapguide-users] Strange SDF locking problem

[doggybs]

It turned out that the problem was actually cause by the autodesk raster
provider on a geo-tiff layer.

Reducing the pool size to 50 did how ever make the vector data load a hell
of alot faster :-), so thanks for that.


Kenneth Skovhede, GEOGRAF A/S wrote:
> 
> How many SDF files are there in total?
> 
> I had a problem with the OGR provider, as it is capable of pointing to a 
> folder of files.
> Very nice, because you can have one dataconnection and it just contains 
> all the tables/files.
> Unfortunately , Windows has a limit on 512 open files.
> A standard MapInfo table consists of 4 files, so a folder with 30 tables 
> takes 120 file handles.
> The connection pool is set to 200 as a default, so you can guess how 
> fast it breaks.
> 
> My experiments show that, depending on the compilation options of the 
> provider,
> the 512 limit is sometimes "pr provider" and sometimes "pr mapguide".
> 
> I would suggest trying to reduce the connection pool to 50 (SDF only has 
> one or two files open).
> 
> Also, you can try to run MapGuide interactively instead of as a service, 
> and you may see the errors
> in the console.
> 
> Regards, Kenneth Skovhede, GEOGRAF A/S
> 
> 
> 
> doggybs skrev:
>> Hi All
>>
>> I am having a very strange problem with Mapguide 2010, and I have no idea
>> what the problem could be or where to start looking for it.
>>
>> The problem only seems to happen in a multi user situation, but what
>> seems
>> to happen is that mapguide will randomly lockout a random selection of
>> SDF
>> files.
>>
>> The end result is quite catastrophic :
>>
>> - All users are no long able to view any of these SDF datasources
>> - tooltips on all layers stop working
>> - all labels on all layers stop appearing
>> - Testing of SDF connections using mapguide studio fails.
>>
>> There is also no indication in the error logs as to what the problem
>> might
>> be.
>>
>> The only way to get the effected layers and map working again is to
>> performance a service restart.
>>
>> I am using FDO version 3.4.0.4701
>>
>> I would be very grateful for any ideas you may have about this problem?
>>
>>
>>
>>   
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> 
> 

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