[Akonadi] [Bug 338571] Performance Regression: Folder synchronisation in 4.14 very slow compared to kMail from KDE 4.13.x

[Gunter Ohrner via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=338571

--- Comment #14 from Gunter Ohrner  ---
Now on Kubuntu 16.04 and still no improvement, the bug prevails:

$ COLUMNS=200 dpkg -l | egrep 'akonadi|kmail'
ii  akonadi-backend-mysql4:15.12.3-0ubuntu6 
all MySQL storage backend for Akonadi
ii  akonadi-server   4:15.12.3-0ubuntu6 
amd64   Akonadi PIM storage service
ii  akonadiconsole   4:15.12.3-0ubuntu1 
amd64   management and debugging console for akonadi
ii  kmail4:15.12.3-0ubuntu1 
amd64   full featured graphical email client
ii  libakonadi-kde4  4:4.14.10-1ubuntu2 
amd64   library for using the Akonadi PIM data server
ii  libakonadi-kmime44:4.14.10-1ubuntu2 
amd64   Akonadi MIME handling library
ii  libakonadiprotocolinternals1 1.13.0-8ubuntu2
amd64   libraries for the Akonadi PIM storage service
ii  libkf5akonadiagentbase5:amd644:15.12.3-0ubuntu1 
amd64   Akonadi agent base library
ii  libkf5akonadicalendar5:amd64 4:15.12.3-0ubuntu1 
amd64   library providing calendar helpers for Akonadi
items
ii  libkf5akonadicontact5:amd64  4:15.12.3-0ubuntu1 
amd64   Akonadi contacts access library
ii  libkf5akonadicore-bin4:15.12.3-0ubuntu1 
amd64   Tools for Akonadi core library
ii  libkf5akonadicore5:amd64 4:15.12.3-0ubuntu1 
amd64   Akonadi core library
ii  libkf5akonadimime5:amd64 4:15.12.3-0ubuntu1 
amd64   Akonadi MIME handling library
ii  libkf5akonadinotes5:amd644:15.12.3-0ubuntu1 
amd64   Akonadi notes access library
ii  libkf5akonadiprivate54:15.12.3-0ubuntu6 
amd64   libraries for the Akonadi PIM storage service
ii  libkf5akonadisearchdebug5:amd64  4:15.12.3-0ubuntu1 
amd64   Akonadi search debug library
ii  libkf5akonadisearchpim5:amd644:15.12.3-0ubuntu1 
amd64   Akonadi search library
ii  libkf5akonadiwidgets5:amd64  4:15.12.3-0ubuntu1 
amd64   Akonadi widgets library

If I click on a larger folder, the following is logged by Akonadi - each line
taking close to one second to appear (Remember: the Dovecot IMAP server runs on
localhost in my case and the system uses a Samsung 840 EVO SSD), and
"Receiving" is done twice, as you can see above, before kMail actually
finishes:

$ 39643
Received:  1000 In total:  1000  Wanted:  39643
Received:  1000 In total:  2000  Wanted:  39643
Received:  1000 In total:  3000  Wanted:  39643
Received:  1000 In total:  4000  Wanted:  39643
Received:  1000 In total:  5000  Wanted:  39643
Received:  1000 In total:  6000  Wanted:  39643
Received:  1000 In total:  7000  Wanted:  39643
Received:  1000 In total:  8000  Wanted:  39643
Received:  1000 In total:  9000  Wanted:  39643
Received:  1000 In total:  1  Wanted:  39643
Received:  1000 In total:  11000  Wanted:  39643
Received:  1000 In total:  12000  Wanted:  39643
Received:  1000 In total:  13000  Wanted:  39643
Received:  1000 In total:  14000  Wanted:  39643
Received:  1000 In total:  15000  Wanted:  39643
Received:  1000 In total:  16000  Wanted:  39643
Received:  1000 In total:  17000  Wanted:  39643
Received:  1000 In total:  18000  Wanted:  39643
Received:  1000 In total:  19000  Wanted:  39643
Received:  1000 In total:  2  Wanted:  39643
Received:  1000 In total:  21000  Wanted:  39643
Received:  1000 In total:  22000  Wanted:  39643
Received:  1000 In total:  23000  Wanted:  39643
Received:  1000 In total:  24000  Wanted:  39643
Received:  1000 In total:  25000  Wanted:  39643
Received:  1000 In total:  26000  Wanted:  39643
Received:  1000 In total:  27000  Wanted:  39643
Received:  1000 In total:  28000  Wanted:  39643
Received:  1000 In total:  29000  Wanted:  39643
Received:  1000 In total:  3  Wanted:  39643
Received:  1000 In total:  31000  Wanted:  39643
Received:  1000 In total:  32000  Wanted:  39643
Received:  1000 In total:  33000  Wanted:  39643
Received:  1000 In total:  34000  Wanted:  39643
Received:  1000 In total:  35000  Wanted:  39643
Received:  1000 In total:  36000  Wanted:  39643
Received:  1000 In total:  37000  Wanted:  39643
Received:  1000 In total:  38000  Wanted:  39643
Received:  1000 In total:  39000  Wanted:  39643
Received:  643 In total:  39643  Wanted:  39643
finished

[Akonadi] [Bug 338571] Performance Regression: Folder synchronisation in 4.14 very slow compared to kMail from KDE 4.13.x

[mefyl via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=338571

mefyl  changed:

   What|Removed |Added

 CC||me...@gruntech.org

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[Akonadi] [Bug 338571] Performance Regression: Folder synchronisation in 4.14 very slow compared to kMail from KDE 4.13.x

[Gunter Ohrner via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=338571

Gunter Ohrner  changed:

   What|Removed |Added

Version|4.13|GIT (master)

--- Comment #13 from Gunter Ohrner  ---
I bumped the "version" to "GIT Master" hoping to increase visibility of this
bug. I'm currently at Akonadi 15.08.3 and kMail 5.0.3, but could not select
those versions from the drop down list...

In KDE 4.13 and below, the IMAP sync performance was always great!

The first appeared in KDE 4.14, has been around ever since and even seems to
get worse rather than better.

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[Akonadi] [Bug 338571] Performance Regression: Folder synchronisation in 4.14 very slow compared to kMail from KDE 4.13.x

[Hatl via KDE Bugzilla]

https://bugs.kde.org/show_bug.cgi?id=338571

--- Comment #12 from Hatl  ---
Any news on this issue?

Create an email account, add 10k of mails -> akonadi/kmail stop working.

To me, this is a major issue. Any web client can handle this many emails.
Thunderbird works fine on the same account while kmail doesn't.

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