[mapguide-internals] SHP performance problem maybe due to .idx

[Trevor Wekel]

>From what I recall, this is SHP Provider behaviour.  Fdo-internals may be a better list for this discussion.

Regards,
Trevor

-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Martin Morrison
Sent: September 20, 2012 7:33 AM
To: MapGuide Internals Mail List
Subject: Re: [mapguide-internals] SHP performance problem maybe due to .idx

Mapguide or FDO issue?

Martin Morrison
Application Engineer
Engineering Design Systems, Inc.
3780 Peters Creek Rd Ext SW
Roanoke, VA  24018
540.345.1410
gis.edsi.com


-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of everling
Sent: Thursday, September 20, 2012 9:23 AM
To: mapguide-internals at lists.osgeo.org
Subject: [mapguide-internals] SHP performance problem maybe due to .idx

I don't know if it is a real bug or not but a search of the mailing list archives have revealed nothing so I'll bring it up here for discussion.

Bug report:
1. Whenever I preview my SHP feature source, the associated *.idx file is modified.
2. This is true for managed or unmanaged files, the relevant *.idx files are always modified.
3. If the SHP feature source is pointing to an unmanaged folder, all *.idx files within the directory are modified even if you are viewing the contents of only one SHP file or previewing the feature source with Maestro.
4. The contents of the *.idx files are unchanged. Confirmed with MD5 file checksums.
4. Reproduced with MGOS 2.2 and MGOS 2.4 RC2 on Windows 7.

I think MGOS recreates the idx files on every view and that this is the reason that MGOS performs poorly on SHP files, especially when working with unmanaged directories. Is this a real bug and is it fixable in time for MGOS 2.4?

Best regards.



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