Bug 293280

Summary:	Reading mails is extremely slow
Product:	[Applications] kmail2	Reporter:	Andreas Schneider <asn>
Component:	general	Assignee:	kdepim bugs <kdepim-bugs>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	lambdae2, Martin
Priority:	NOR
Version:	4.8
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Andreas Schneider 2012-02-04 10:54:27 UTC

Version:           4.8 (using KDE 4.8.0) 
OS:                Linux

Opening/retrieving an email takes 20 sec for each mail. Kmail2 is simply not useable this way. This is not a connection problem to my imap server. 20 sec looks like a value for a timeout.

Reproducible: Always

Steps to Reproduce:
Read emails

Actual Results:  
Opening a mail takes 20 sec.

Expected Results:  
Clicking on the mail should open it constantly.

Comment 1 Andreas Schneider 2012-02-06 11:10:25 UTC

After fixing nepomuk, see bug #289932, it works again.

Comment 2 Andreas Schneider 2012-02-06 11:11:14 UTC

This looks like kmail2 doesn't work without nepomuk anymore.

Comment 3 Elián Hanisch 2012-05-08 14:51:39 UTC

I'm getting the same problem in KDE 4.8.2, kubuntu 12.04. Reading any email takes like 20-30 seconds to show up, disabling nepomuk had no effect.

I have tried restarting akonadi, kmail and nepomuk without success, nothing relevant is shown in kmail's output. Have to test with a full system restart.

Comment 4 Elián Hanisch 2012-05-09 22:49:56 UTC

restarting seems to have fixed it.

Comment 5 Martin Steigerwald 2015-09-09 21:14:15 UTC

Thank you Andreas and Elian. It is about a version of KMail which uses Nepomuk and is unmaintained. Thus closing. If you still see performance issues please open new reports. But please follow the following guide lines to avoid unnecessary work for the developers:

- Ideally test with KDEPIM and Akonadi 15.08. It contains some performance
improvements like the binary protocol.

- Otherwise at least use KDEPIM 4.14.10 and newest Akonadi 1.13 you can get as
it already contains some performance improvements.

- If you can wait, please retest with KDEPIM and Akonadi 15.12 once they become
available for you. Akonadi 15.12 will contain *massive* performance
improvements implemented by Dan due to new database indexes, optimized queries
and leveled file_db directory. All of these are in master already, so if you
dare use kdesrc-build to compile KF5, kdepim and kdepim-runtime. I am using
this currently and it basically moves the bottleneck to KMail (slow threading
for example). It is a *huge* improvement.

Thank you and greetings from KDE Randa Meetings,
Martin