[Bug 213951] Removing DIMAP Accounts from KMail crashes Kontact

[Daniel Buus]

https://bugs.kde.org/show_bug.cgi?id=213951


Daniel Buus <bugreporting at rhesusb.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|WORKSFORME                  |




--- Comment #5 from Daniel Buus <bugreporting rhesusb com>  2009-11-15 11:19:26 ---
Hi again :) Sorry for the late response - joined the übercool people who have
the new improved flu ;)

Also, sorry for being imprecise - what was fixed by my tampering with the rc
file was simply the multitude of dialogs that would pop up again and again when
using the program after the crash happened. So the OB, the crashing, is still,
well, open or whatever :)

Anyway, it happened again at home, where I did the same thing on my home laptop
(removing two (actually the same two) DIMAP accounts for Google mails).
Eventually went into dialog spasms, then crashed, then spammed me with dialogs
on restart and periodically while using the program.

I'm wondering if this has anything to do with the buggy way that big numbers of
email is handled in KMail? For instance, when copying/moving many emails from
one folder to another, I have to make sure not to copy too many at a time, or
KMail will eat all available memory, then all the swap space, then moving the
mouse becomes close to impossible, then KDE starts killing processes, then KDM
goes down in flames.

Actually, I previously thought that this was probably because KMail copied all
source mails into memory before putting them into the target, but I just moved
about 1000 mails from one IMAP account to another IMAP account (no local
files), and within roughly 10 secs, KMail had eaten 64.5% of my 4GB memory,
then started to do the moving. This cannot be because of copying the mails into
memory, as they're on an IMAP server, so fetching them would take much longer
than 10 secs...

Also, while moving them, the memory usage slowly increased to just over 70%,
then slowly decreased to 67.4% when it finished. Interesting, that was half an
hour ago, and KMail has still not released the memory. This sounds like a bad
memory leak, doesn't it? And would explain why KMail crashes so often when
doing interval mail checks on my old DIMAP setup (my GMail has more than 20,000
messages). I actually turned off interval checks on DIMAP to avoid getting the
stuttering-mouse-everybody-swapping-argh-konsole-killall-9-kontact-phew
scenario :)

Anyway, sorry, this is probably a completely different bug, should've filed it
elsewhere, I'm just wondering if these are related... And probably there won't
be any work on the mail data structures, since AFAIU, you're currently working
on letting Akonadi do the storage now, right? Or maybe I'm just misinformed :)

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