[Akonadi] [Bug 334206] New: While maildir resources synchronrizes a folder KMail blocks on switching to a different folder

[Martin Steigerwald]

https://bugs.kde.org/show_bug.cgi?id=334206

            Bug ID: 334206
           Summary: While maildir resources synchronrizes a folder KMail
                    blocks on switching to a different folder
    Classification: Unclassified
           Product: Akonadi
           Version: GIT (master)
          Platform: Debian unstable
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: server
          Assignee: kdepim-bugs at kde.org
          Reporter: Martin at Lichtvoll.de

I found that while Akonadi maildir resources synchronizes a folder certain
operations in KMail are block. I found this to be the case with switching to a
different folder. It takes minutes before KMail responds again.

Reproducible: Always

Steps to Reproduce:
1. Have a maildir resource.
2. Have a large folder.
3. Have Akonadi synchronizing it.
4. Click on a different folder in kmail.
Actual Results:  
KMail is blocked for minutes. It just doesn´t respond to clicks while Akonadi
maildir resource is 100% busy. If I kill this process KMail *immediately*
responds to the last user request, but then is blocked again after Akonadi
restarted the maildir resource process.

Expected Results:  
KMail responds to user requests immediately or almost immediately. KMail´s GUI
is never blocked according to the following design goal of Akonadi:

Concurrent access allows background activity independent of UI client

    Syncing mail, calendar, addressbooks to remote servers
    Syncing with mobile devices
    Permits semantic desktop infrastructure to access PIM data
    Archiving
    Indexing
    Out-of-process search 

http://community.kde.org/KDE_PIM/Akonadi#Features


I can share a collection of large folders as xz archive, including kernel-ml
folder with about 220000 mails. Dan already got a copy of these from me.

I/O is not the issue here. Akonadi is hogging the CPU 100%, SSDs are *not*
fully ultilizes.

I am tempted to raise the bug priority to more than normal, as this bug makes
KMail unusable for minutes.

I am currently using Akonadi git 1d1969c65c10c9d3f054f6dafb0f5a2a97d48281.

-- 
You are receiving this mail because:
You are the assignee for the bug.