Bug 458980

Summary:	Large mbox eats the whole memory
Product:	[Frameworks and Libraries] Akonadi	Reporter:	tusooa <tusooa>
Component:	MBox Resource	Assignee:	kdepim bugs <pim-bugs-null>
Status:	REPORTED ---
Severity:	normal
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description tusooa 2022-09-10 22:20:55 UTC

SUMMARY
***
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***
A large (351M) mbox will make akonadi eats all system memory.

STEPS TO REPRODUCE
1. Get a large mbox file. (I got it from gmail export)
2. Add it as a receiving account in KMail. (Configure -> Accounts -> Receiving -> Add... -> Custom account -> mbox)
3. Reboot

OBSERVED RESULT
Memory usage is very high, using almost all memory (I have 16 GB), system becomes very laggy. After `akonadictl stop`, the memory usage goes down immediately.

EXPECTED RESULT
It should not use up a lot of memory. For a comparison, mutt uses only 39M of memory opening the mbox.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma:  5.18.12-gentoo-x86_64
(available in About System)
KDE Plasma Version: 5.25.5
KDE Frameworks Version: 5.97.0
Qt Version: 5.15.5

ADDITIONAL INFORMATION