[Nepomuk] Virtuoso eating up CPUs

Sebastian Trüg trueg at kde.org
Mon Sep 13 09:32:36 CEST 2010


Actually the userVisibility stuff is for 4.6 only. And also recent tests
make it much slower than the previous approach. This is something that
confuses me a lot and reason enough not to backport it.

As for nicing Virtuoso: I agree with that. And the trunk version already
does that. So all we need to do is to backport that to 4.5.2.

Cheers,
Sebastian

On 09/12/2010 10:18 PM, Vishesh Handa wrote:
> Virtuoso goes crazy with some queries. :-/ We know about it, and can
> reproduce it. It's not a 4.5.1 issue, it's just a virtuoso thing.
> 
> @Sebastian : Weren't your userVisibility patches supposed to fix this?
> 
> - Vishesh Handa
> 
> On Mon, Sep 13, 2010 at 1:44 AM, Bèrto ëd Sèra <berto.d.sera at gmail.com
> <mailto:berto.d.sera at gmail.com>> wrote:
> 
>     Hi all,
> 
>     I'm not sure this is the right address for this, but I guess nepomuk
>     is the only service using virtuoso on my machine. After upgrading to
>     KDE 4.5.1 I have the following situation:
> 
>     gentoo ~ # top
>     top - 23:08:12 up 27 min,  3 users,  load average: 2.72, 2.50, 1.96
>     Tasks: 204 total,   1 running, 203 sleeping,   0 stopped,   0 zombie
>     Cpu(s): 57.5%us,  5.3%sy,  2.3%ni, 32.4%id,  1.2%wa,  0.2%hi,
>      1.2%si,  0.0%st
>     Mem:   2070852k total,  2006160k used,    64692k free,   218416k buffers
>     Swap:  1004020k total,     8112k used,   995908k free,   801184k cached
> 
>       PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>                                                                        
>                                  
>      3439 bertodse  20   0  131m 122m 6392 S   90  6.1  23:00.11
>     virtuoso-t                                                          
>                                         
>      3486 bertodse  20   0 88436  28m  16m S   16  1.4   3:40.49 krfb  
>                                                                        
>                                   
>      3263 bertodse  20   0  379m  95m  35m S    8  4.7   1:17.93
>     plasma-desktop                                                      
>                                         
>      2656 root      20   0  268m  58m 9428 S    6  2.9   1:18.28 X      
>                                                                        
>                                  
>      2925 freenet   30  10  426m 119m  14m S    4  5.9   2:38.24 java  
>                                                                        
>                                   
>      2842 bertodse  20   0 98.0m  26m 8316 S    2  1.3   0:31.48 deluged
>                                                                        
>                                  
>      3435 bertodse  20   0  179m  18m  15m S    1  0.9   1:51.45
>     nepomukservices                                                    
>                                          
>      2972 gnunetd   39  19  137m 7252 3832 S    1  0.4   0:16.34 gnunetd
>                                                                        
>                                  
>      4145 bertodse  20   0  144m  39m  17m S    1  2.0   0:05.59 chrome
>                                                                        
>                                   
>      3591 bertodse  39  19 97916  25m  18m S    1  1.3   0:05.87
>     nepomukservices                                                    
>                                          
>      4241 root      20   0  2440 1216  880 R    1  0.1   0:00.15 top  
> 
>     Nepomuk services (is it the clients?) appear to behave correctly,
>     yet virtuoso is eating up the processor to the point in which KDE
>     becomes hardly usable. Is there a way to configure it, so that it
>     calms down a bit?
> 
>     Bèrto
> 
>     _______________________________________________
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> 
> 
> 
> 
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