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Old 06-26-2010, 07:33 AM
"giovanni_re"
 
Default Slow response, due to virtuoso-t, "kdeinit4: plasma-desktop"? HowTo fix? ; jor KUbuntu

About every 10 minutes, lasting about 1.5 minutes, virtuoso-t is running (maybe also "kdeinit4: plasma-desktop"), doing about 100 reads per second, & slowing things down right then, & I think also in the minutes following.

I think this might be the source of my system running so slow at times.

I think it might be causing other applications (ex, firefox, or a switch on the desktop to a different window, when I click to some other window), to have to do many disk reads to read in cached information, which has been lost from RAM when virtuoso-t just ran.


== What is v-t doing?
In the service of what other sw? Where can this be learned about? I didn't find a man page for v-t.

Where can settings for v-t, or the other sw, be viewed, & perhaps modified? In the "System Settings" program someplace?


Perhaps one thing that might improve system response times is to run v-t less often - maybe once per hour, or per day. Is this possible? Useful? A good idea? What would need to be done/modified to achieve that?

Is this KDE specific sw? Does GNOME also use this?


== What is "kdeinit4: plasma-desktop" doing?
In the service of what other sw?

Where can settings for "k4 p-d", or the other sw, be viewed, & perhaps modified? In the "System Settings" program someplace?


== System tray "Search Service" - does what?
Note: In the system tray, when this disk IO had been going on (starting at 1146 PM) for several minutes, I left clicked on the "Search Service" icon, selected "suspend file indexing", but the IO kept going for several minutes more, & from iotop it was v-t & k4 p-d running.

Does that suspend mean "don't start it again", or "immediately"? Because it didn't stop immediately, but continued for several more minutes.


== Where is the "file search" function?
In KDE 3, IIRC, there was an item in the KDE start button to do a file search.

I don't see a file search function anywhere under the K-Start button menu now.

If v-t & "Search Service" are doing an indexing, what sw _uses_ that index to let the user do a search of the files on the disk?


==
Thanks


================================================== ===================
== System: KUbuntu 10.4 64 bit version, 4 core processor, 4GB RAM, TB hard disk

==
Running:
iotop -k -a
to monitor IO.

I see:
1) virtuoso-t has 3 running processes which total together the highest IO reads KB.
2) the 2nd highest read KB is "kdeinit4: plasma-desktop",
3) the 3rd highest read KB is firefox.

(see cuts from iotop below)


===== References:
virtuoso-t eats my CPU, should be nice
1. Ubuntu
2. “kdebase-runtime” package
3. Bugs
4. Bug #578215
https://bugs.launchpad.net/ubuntu/+source/kdebase-runtime/+bug/578215

Virtuoso -t takes 416MB from my RAM
http://forum.kde.org/viewtopic.php?f=154&t=85951

[kubuntu] Getting rid of virtuoso-t and nepomuk
http://ubuntuforums.org/showthread.php?p=9383657

what to do with virtuoso-t bad habits?
http://osdir.com/ml/kubuntu-users/2010-06/msg00230.html

Re: [arch-general] kde44beta - 'virtuoso -t' grabbing ~80% of the CPU every few minutes
http://www.mail-archive.com/arch-general@archlinux.org/msg10925.html


==
dpkg -l | grep virtuoso | sort
ii virtuoso-nepomuk 6.1.0-0ubuntu3 OpenLink Virtuoso Open-Source Edition (OSE)


===== iotop -k -a ; cuts from, showing largest read KB:
Total DISK READ: 0.00 K/s | Total DISK WRITE: 0.00 K/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
4218 be/4 . 87812.00 K 548.00 K ?unavailable? thunderbird-bin
2197 be/4 . 104964.00 K 12.00 K ?unavailable? virtuoso-t +foreground +configfile /home/-/.cache/virtuoso_hX1757.ini +wait
2199 be/4 . 110132.00 K 8.00 K ?unavailable? virtuoso-t +foreground +configfile /home/-/.cache/virtuoso_hX1757.ini +wait
30772 idle . 21340.00 K 0.00 K ?unavailable? nepomukservicestub nepomukstrigiservice
30776 idle . 34728.00 K 0.00 K ?unavailable? nepomukservicestub nepomukstrigiservice
4592 be/4 . 108536.00 K 4.00 K ?unavailable? virtuoso-t +foreground +configfile /home/-/.cache/virtuoso_hX1757.ini +wait
596 be/4 . 28452.00 K 244.00 K ?unavailable? systemsettings -caption System Settings -icon preferences-system
27477 be/4 . 11044.00 K 0.00 K ?unavailable? npviewer.bin --plugin /usr/lib/flashplugin-installer/libflashplayer.so --connection /org/wrapper/NSPlugins/libflashplayer.so/24239-4
1189 be/4 root 13916.00 K 0.00 K ?unavailable? X -nr -nolisten tcp :0 vt7 -auth /var/run/xauth/A:0-ZodJta
32139 be/4 . 11908.00 K 24.00 K ?unavailable? kdeinit4: ksysguard [kdeinit]
24239 be/4 . 137204.00 K 2544.00 K ?unavailable? firefox-bin
1735 be/4 . 183092.00 K 272.00 K ?unavailable? kdeinit4: plasma-desktop [kdeinit]
1791 be/4 . 17892.00 K 80.00 K ?unavailable? kdeinit4: kate [kdeinit] -session 1061000000127356059300000016050022_1277190024_6709 08

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