In my machine is the same thing. Turning it off is a right and wise solution?

For the time being yes as its not that useful anyway. But thats about to change in future KDE releases when most/all applications support it.

In the KDE 4.4.rc1 that I am running I have configured Nepomuk to use at most 50 MB of disk storage. It is not slowing down my machine at all.

Eric

Ahh, but "supporting it" and "requiring it or die" are two different things.

I too have shut it and its strigi counterpart off completely (cannot remove it because Konq depends on it being around), but I must say, if like Eric writes, actually "configuring it" makes it work efficiently, and be useful, then it may well become something to be *used* by more folks in the future as opposed to "shut off, I don't like it".

50MB is less than my FF cache IIRC, so yeah, that's pretty reasonable -- definitely more reasonable than using 1Gib of disk space to operate.

How can I do the something in KDE 4.3.4?

I'll have to something about it as well. I had htop open this morning and nepomuk was using 90% of one core and 54% of the other for ages.