[K12OSN] Sky high load average with FF and CentOS?

[James P. Kinney III]

On Fri, 2008-08-22 at 00:48 -0400, James P. Kinney III wrote:
> Take off the flash plugin and see if the load drops.
> 
> If a bunch of people all use the same web page built with M$ web tools
> (Designed for IE is a clue!) firefox must work like mad to render it. If
> it has a mess of flash wiggly things, it _EATS_ cpu time. It doesn't
> matter if it firefox 2 or 3 or anything. Some things just perform poorly
> in a heavy multi-user environment. Be sure to use noatime and good
> swappiness values. 
> 
> Where did you get FF3 for Centos? It doesn't ship with FF3, but FF2
> instead.
My bad. I blinked and didn't notice the change with 5.2. Need sleep...

Be sure to upgrade ASAP on the firefox. The beta version was OK for
single user but slow for multi-user.
> 
> On Thu, 2008-08-21 at 13:20 -0400, David Hopkins wrote:
> > An interesting (some might say irrititating) problem.  Rebuilt a
> > server with CentOS EL5, upgraded to 5.2  Users are running FF3, Adobe
> > Acrobat Reader, and StarOffice.  Things work well until reach around
> > 28 users. Then, it just crawls and the load  average shoots up to 20+
> > (this is a 4 processor box with 15Krpm SCSI drives in a RAID 1, home
> > directories are on a dedicated file server).  It was running FC6 with
> > 40+ users without issues last year, but I decided to move to CentOS.
> > I have no idea why the system would suddenly become so unresponsive.
> > I want to 'guess' that it is FF related, especially based on the
> > google searches concerning FF3 and performance.  Also, FF is using is
> > using 50%+ of the cpu per user.   I have to admit that I am rather
> > upset at the moment with FF3, and when I tried the simple approach to
> > untarring a build of FF2, I get all sort of errors related to
> > libraries.
> > 
> > Anyhow, sorry for the rant, but this is happening with the teachers
> > just logging in. Students show up next week.
> > 
> > Sincerely,
> > Dave Hopkins
> > 
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> > 
> -- 
> James P. Kinney III          
> CEO & Director of Engineering 
> Local Net Solutions,LLC                           
> http://www.localnetsolutions.com
> 
> GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
> <jkinney at localnetsolutions.com>
> Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7
> 
> 
-- 
James P. Kinney III          
CEO & Director of Engineering 
Local Net Solutions,LLC                           
http://www.localnetsolutions.com

GPG ID: 829C6CA7 James P. Kinney III (M.S. Physics)
<jkinney at localnetsolutions.com>
Fingerprint = 3C9E 6366 54FC A3FE BA4D 0659 6190 ADC3 829C 6CA7


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