From kdepim-users  Wed Aug 05 22:03:33 2009
From: Ingo =?iso-8859-1?q?Kl=F6cker?= <kloecker () kde ! org>
Date: Wed, 05 Aug 2009 22:03:33 +0000
To: kdepim-users
Subject: Re: [kdepim-users]
Message-Id: <200908060003.34243 () thufir ! ingo-kloecker ! de>
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On Wednesday 05 August 2009, David Mills wrote:
> Hi,
>
> I used to have kontact and kmail that came with kde 3.5.9.  I'm sure
> that there was an option to turn on/off automatic periodic compaction
> for all folders.

No. There never was such an option.


> I have just upgraded to kde 4.2.4.  Kmail now hangs for long periods
> of time and chews through 100% CPU.  I can only suspect it was doing
> compaction.  It seemed to be doing it several times a day.
>
> I have a lot of folders with a lot of email so this process was
> taking a lot of time and chewing through most of my computer's
> resources.  At one point the kmail process got to 6 GB of memory used
> and I wasn't able to do much else with the computer.
>
> I cannot find a way to turn off automatic compaction with this new
> version - so I have set "Compactable=3Dfalse" for all my folders in the
> kmailrc file. This seems to have fixed the issue of kmail using 100%
> CPU for long periods of time.  But now I am unable to compact folders
> even manually.
>
> How can I get manual operating but not automatic?  Or even better,
> automatic only to operate on a few select folders (i.e. the ones I
> use most)?

I cannot really add much to what you have already found yourself.=20
Setting "Compactable=3Dfalse" disables compaction completely. It is set=20
by KMail in case a possible problem with the index files is detected.=20
This is done in order to prevent the loss of mail during compaction due=20
to broken index files.

Unless you have really good reasons to keep using mbox folders I suggest=20
to convert all folders to maildir format. This will solve the problem=20
of compaction since maildir folders do not need to be compacted.=20
Unfortunately, there's no easy way to convert a folder from mbox format=20
to maildir format. One way to do it is to create a new folder in=20
maildir format, move (or copy) all messages from the old folder to the=20
new folder, delete the old folder (after verifying that moving/copying=20
was successful), rename the new folder to the old folder.=20
Unfortunately, references to the old folder (e.g. as target of a=20
filter) will be lost.


Regards,
Ingo

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