Very Large File Having An Unknown Purpose

[joany]

My my /home directory was growing quite large over time. Using K4DirStat, I was able to identify a large file ~/.kde/share/apps/nepomuk/repository/main/data/vituosobackend/soprano-virtuoso.db that was buried on the HDD. After deleting that file and restarting the system, my /home directory was reduced from over 1900 MB down to 1600 MB. The system did recreat soprano-virtuoso.deb, but it's only 8 MB ATM. (It's not like I'm running out of space on the HDD, but saving 300 MB is a welcome improvement when making backups to /home.)

I believe nepomuk has something to do with file indexing, which enables content searches within files and directories. The search function doesn't seem to be affected, so I'm wondering what the purpose of soprano-virtuoso.db actually is. Any ideas?

EDIT:
I'm kind of tempted to render soprano-virtuoso.db immutable, which would prevent its growth. But I want to make sure it's not performing some vital function.

[richb]

It is the database nepomuk creates for file name and content searches. It is a common complaint that the db grows eating space. You can turn it off in System settings.

EDIT: Later versions of KDE do not have the file and do not suffer from the same space usage.

[joany]

It is the database nepomuk creates for file name and content searches. It is a common complaint that the db grows eating space. You can turn it off in System settings.

EDIT: Later versions of KDE do not have the file and do not suffer from the same space usage.

Disabling nepomuk in System Settings seems like a good plan. (I'm looking forward to one of those later versions of KDE being available for MX.)

[Stevo]

MX 15 on the Jessie base should have KDE 4.14.2 available--I'm using it in a Jessie VM, and it's very much like the Wheezy version--no new plasma widgets as part of the stock install, no new desktop effects, and so on. I'm sure there are lots of changes under the hood. I do notice that Dolphin has dropped its menu and added a dropdown equivalent as is the fashion, labeled "Control".

[richb]

MX 15 on the Jessie base should have KDE 4.14.2 available--I'm using it in a Jessie VM, and it's very much like the Wheezy version--no new plasma widgets as part of the stock install, no new desktop effects, and so on. I'm sure there are lots of changes under the hood. I do notice that Dolphin has dropped its menu and added a dropdown equivalent as is the fashion, labeled "Control".

Significant under the hood changes.

[Danum]

MX 15 on the Jessie base should have KDE 4.14.2 available--I'm using it in a Jessie VM, and it's very much like the Wheezy version--no new plasma widgets as part of the stock install, no new desktop effects, and so on. I'm sure there are lots of changes under the hood. I do notice that Dolphin has dropped its menu and added a dropdown equivalent as is the fashion, labeled "Control".

Significant under the hood changes.

Nepomuk is no longer used for search, from 4.13 on baloo is used,
a new addition is "plasma-widget-milou", for searching,
Below is from a newly installed MC-KDE iso,
About-system is not in the Debian repos.