[fdo-internals] SHP performance problem may be due to .idx

everling tceverling at yahoo.co.uk
Thu Sep 20 09:51:14 PDT 2012

Hello. Trevor suggested that the FDO Internals may be a better list for the
following bug report that I originally posted in the MapGuide Internals

> 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.

Best regards.

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