[kmail2] [Bug 323875] New: mixedmaildir resource buggy and sloooow

Volker Kuhlmann list0570 at paradise.net.nz
Thu Aug 22 02:18:24 BST 2013


https://bugs.kde.org/show_bug.cgi?id=323875

            Bug ID: 323875
           Summary: mixedmaildir resource buggy and sloooow
    Classification: Unclassified
           Product: kmail2
           Version: 4.10.5
          Platform: openSUSE RPMs
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: kdepim-bugs at kde.org
          Reporter: list0570 at paradise.net.nz

The mixedmaildir resource looks like a really good idea, but...

To scan an mbox file with 6000 emails after 1 new mail has been added, mutt
needs less than 1 second for a complete and accurate scan, and that without any
kind of index caching or any other bloat at all. kmail needs 10s of seconds to
5 minutes!!!! And that will all that phenomenal SQL bloat hanging off it - or
perhaps that's the real problem.

A complete restart of akonadi and kmail will be necessary when selecting
different folders and an email in each of them without making sure first that
the previously selected 
Frequently kmail gets stuck "synchronising" altogether. The only recourse is to
quit kmail, stop akonadi, wait for akonadi to exit (a minute is easily possible
- dang it's tempting to use kill), and start again. But then it could be it's
not a deadlock - difficult to tell how many hours to wait for a miraculous
recovery, with tens of folders times 5 minutes.


Reproducible: Always

Steps to Reproduce:
1. Create a mixedmaildir resource for an existing directory with
subdirectories, all containing only mbox files.
2. Try to get some work done: append an email with another program + with
kmail, resync directories incl content because kmail's state isn't accurate or
uptodate, select a folder and an email within, then select another folder and
an email within that before the first one finished doing anything useful to the
user (like show the selected email), ...
3.
Actual Results:  
Unusably slow perofrmance, deadlocks.

Expected Results:  
Speedy performance on modern hardware.

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