[OpenAFS] Suspect AFS bottlenecks on a web server

Simon Wilkinson sxw@inf.ed.ac.uk
Sat, 21 Nov 2009 15:31:21 +0000

On 21 Nov 2009, at 15:10, Jason Edgecombe wrote:
> 1. My web server is on solaris, currently.

Yeh, I should learn to read. Sorry.

> 2. How do I disable dynamic vcache support?

If you're on Solaris, you don't need to. Ignore that bit!

> 3. I'm rolling 1.4.10 because I already have it compiled and  
> packaged for deployment. (using the AFS package program, if that  
> matters). I have already tested these binaries on other machines.  
> Recompiling would require restarting the whole test cycle.
> I have some data that suggests I need to increase the size of the  
> vcache. It's about a 5% miss rate vs 2% miss rate on the dcache.  
> I'll tweak the vcache size if the upgrade doesn't improve things.

If you're seeing a contention problem, that it's possible that a  
larger vcache won't help. But it's worth giving it a go.