Reducing .local/share/akonadi

[Martin Steigerwald]

Hello.

solitone - 19.07.17, 15:23:
> I use kmail to access three IMAP accounts, one POP3 account, and a local
> folder.
> 
> Since my .local/share/akonadi folder is pretty big (1.3 GB):
> 
> $ du -h -d 1 .local/share/akonadi
> 401M    .local/share/akonadi/db_data
> 497M    .local/share/akonadi/search_db
> 377M    .local/share/akonadi/file_db_data
> 4.0K    .local/share/akonadi/db_misc
> 1.3G    .local/share/akonadi
> 
> I was wondering whether there is a way to clear up some space.
> 
> For instance, what's the purpose of the search_db directory?

The ways of cleaning up .local/share/akonadi folder have been discussed before 
here on this list several times.

Short recap/summary:

- akonadictl fsck: Can move unused/leaked files to file_lost+found. You can 
remove that lost+found directory afterwards. Recent enough versions of Akonadi 
should not leak files in there anymore.

- akonadictl vacuum: Compresses databases table files. You need minimum 
freespace of at least twice of the largest table, as it basically rewrites the 
table files.

search_db is fulltext indexing. It is supposed to be possible to switch it off 
for certain folders… yet exactly that currently doesn´t work or isn´t even 
fully implemented. At least unless some developer implemented it recently. 
KMail has that option, but it has no effect.

1.3 GiB is not very much. Actually its really rather small. My private mail 
accounts:

martin at merkaba:~> du -h -d 1 .local/share/akonadi | sort -rh
12G     .local/share/akonadi
7,9G    .local/share/akonadi/search_db
3,8G    .local/share/akonadi/db_data
123M    .local/share/akonadi/file_lost+found
68M     .local/share/akonadi/file_db_data
0       .local/share/akonadi/db_misc

Whoa… thats crazy. I wasn´t aware that it is this high meanwhile. I really 
would like to disable mail indexing for certain free software mailinglist 
folders. At least I recovered 123M by removing file_lost+found. But well its 
still not as large as the original data:

martin at merkaba:~> du -sh .local/share/local-mail
28G     .local/share/local-mail
martin at merkaba:~> find .local/share/local-mail -type f | wc -l 
2510763

Thanks,
-- 
Martin