new kernels and slow access to mars_nwe files

new kernels and slow access to mars_nwe files

[Rafał Cygnarowski]

Hi!

I have few stations running mars_nwe servers and dosemu accessing resources of 
these servers. After upgrading kernel from 2.6.4 to 2.6.16 every operation on 
mars_nwe disks is very slow (copying 13MB of data takes at least 1 minute!). 
Even more... it have tendency to stuck for a moment while accesing mars_nwe 
disk :(
Has anyone know what can be reason of such behaviour?

Thanks in advance for any help!
-- 
Rafał Cygnarowski
rafi@pers.pl
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Re: new kernels and slow access to mars_nwe files

[Rafał Cygnarowski]

Dnia środa, 27 września 2006 17:14, napisałeś:
> I have few stations running mars_nwe servers and dosemu accessing resources
> of these servers. After upgrading kernel from 2.6.4 to 2.6.16 every
> operation on mars_nwe disks is very slow (copying 13MB of data takes at
> least 1 minute!). Even more... it have tendency to stuck for a moment while
> accesing mars_nwe disk :(
> Has anyone know what can be reason of such behaviour?

I found solution to this problem. I changed $_hogthreshold to sth more than 1. 
Then it took to much CPU power - over 50%. Then I changed $_rdtsc to (on) and 
now I takes less than 40%. 

I'm curious what happend? My old config was good for over 5 years without 
changing till these kernels :/

-- 
Rafał Cygnarowski
rafi@pers.pl
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