Bug 354438

Summary:	akonadi-imap-resource extremely slow and 100% CPU usage
Product:	[Frameworks and Libraries] Akonadi	Reporter:	Vasilis Tsiligiannis <billtsil>
Component:	IMAP resource	Assignee:	Christian Mollekopf <chrigi_1>
Status:	REPORTED ---
Severity:	grave	CC:	heri+kde, kdepim-bugs, rapiteanu.catalin, schwancarl, vkrause
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Ubuntu
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Vasilis Tsiligiannis 2015-10-27 07:07:31 UTC

I have a very large IMAP folder and the akonadi-imap-resource takes forever to read it after the latest upgrade to 15.08.2. Previous version read my emails in a few minutes but current takes hours if it ever completes the process. This renders the whole support for IMAP broken since you cannnot receive or view new e-mails.

Reproducible: Always

Comment 1 Vasilis Tsiligiannis 2015-10-28 20:38:04 UTC

Additionally, I noticed that akonadi_imap_resource process consume huge amounts of memory (~ 360MB).

Comment 2 Dennis Schridde 2017-04-22 14:16:35 UTC

I have a similar issue with 17.04.0: `htop` showed multiple threads of `akonadi_imap_resource` running with very high CPU utilisation (50% for several hours apparently). Then suddenly CPU utilisation spiked to 100% for one thread and 200% for the process and memory usage started to climb rapidly until the process was OOM killed after a few minutes at well above 10GiB RAM usage.

Comment 3 Viorel-Cătălin Răpițeanu 2019-01-22 08:49:26 UTC

I have the same issue on the latest Plasma/Frameworks/Applications.

Comment 4 carl 2019-06-05 18:35:21 UTC

I still have the 100% cpu problem with KMail 19.04. 


But not always, after killing KMail (I didn't restart Akonadi) and restarting it, I get a normal ~10-13% cpu.

I will try to find a way to reproduce this bug.

Comment 5 Christoph Feck 2019-06-25 15:54:32 UTC

Do the workarounds for bug 373443 help also for this issue?