[Akonadi] [Bug 397316] akonadi loses connection with IMAP server after suspend (but not only, DB error too)

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=397316

--- Comment #1 from yves.caniou at ens-lyon.fr ---
I had to stop akonadi each time I loggued on my computer, like returning from
suspend mode (is it normal that akonadi restarts after suspend if it was
stopped beforehands?).
If I did not stop it, I realized that the computer turned slow, making a lot of
swap. It turned out that akonadi requires a lot of swap space which is
encrypted on my computer, thus wasting a lot of cpu too.

Gentoo proposed upgrades for akonadi, so:
Akonadi is v18.04.3
I gave a try to fsck and vacuum, with a renice 19, and see what happens.

fsck lasted a few hours. Revealed many errors.
vacuum is now sticked to "optimizing table CollectionTable..." since ~3days.
No cpu, and akonadiserver is using more than 27.1GB of memory
-> "vacuuming database that'll take some time and require a lot of temporary
disk space..." should say that one should had some Gigs to its swap space (I
thought /tmp space would be ok. It's not).

How long is "some time"?
There's nothing on the activity of vacuum...

In addition, i tried kmail: 
- kmail lost contact with two smtp servers (M$ and linux) but says it still
manages another one and local mails.
- Trying send a mail results in a error message (partly in french, so
translated): "There have been problems trying to put the message in sending:
unable to append item flags."

It's been several months now.
What can I do?

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