[kde-linux] Renicing KDE service daemons

[Kevin Krammer]

On Tuesday 10 February 2009, David Baron wrote:

> > So most of the time they will be sleeping.
>
> At least for a long-enough period maybe for syncronization, these thingies
> are taking several percent each of CPU time. I believe that many posted
> compaints about overall slowness of reponse in kde4.2 are due to this!

My guess is that these reports are rather about slow visualizations.
The only complain about processes so far seem to be Nepomuk when its Strigi 
indexer is doing its initial work.
Most of the time this seems to be related to the Redland backend being used 
instead of the much faster Sesame2.

> > However, since they get active as part of another processes service
> > request, renicing them could potentially lead to problems, e.g. an
> > application not getting a result because the service does not get run
> > when the application is running in parallel with a better priority.
>
> Since this is dbus-mediated, it should be possible to solve this problem if
> it does indeed exist. I have reniced this stuff manually and using "and"
> with no ill-effects but few things actually are active clients of these
> processes.

Ah, good to know.

> > Dispite running two KDE sessions in parallel, I don't see any of those
> > services pop up in top other than an occasional 1% CPU of kded or kded4
>
> Are you running akonadiserver? As I said, I see several %/each.

Yes and several different resources.
All processes sleeping all the time unless and Akonadi client requests data or 
I change the files of file based resources.

> > Would be interesting to know which services take any noticable amount of
> > processing power on your system while being idle.
>
> OK, I'm am running on a PIII/600mhz clunker, but still ....

Well, this would mean you'll get higher numbers than myself once they are 
running, but it is weird *that* they are running in the sense of not 
sleeping.

Cheers,
Kevin
-- 
Kevin Krammer, KDE developer, xdg-utils developer
KDE user support, developer mentoring
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