[ILUG] [WAS] www.itsyourmoney.ie [Now centos5 perf]

[John Moylan]

Dude, 

Centos 4,5  
nfsvers=3,noatime,bg,actimeo=60,timeo=14,intr,rw,rsize=16384,wsize=16384
0 0

NFS Server is C3 with best practice, usual sysctl tricks applied.

using dd reads of a 1G file using bs 16K finish in half the time on c5
versus C4. Write are way slower, this experience has been reported by
others also.

Apache issue is particularly frustrating.

C4 machine is 32bit with 4GB RAM, C5 is 64bit with 10GB RAM. 

>but its US  
> election times, init?)

erm...yes.

J

On Thu, 2008-02-07 at 17:49 +0000, Conor Wynne wrote:
> On 7 Feb 2008, at 15:08, Vincent Cunniffe wrote:
> 
> > John Moylan wrote:
> >> NFS writes are slower on Centos 5 than 4 . NFS  reads are alot faster
> >> on 5 than 4
> 
> NFS version what? More info required my friend. What is the server  
> configured as, what are the clients using for mounts etc.
> 
> >>
> >> With Apache on Centos 5 my test server can only serve 30% of the
> >> requests per second that my Centos4 test server can, even though it
> >> has double the number of cores and 2.5times more RAM.
> 
> Apache, as well eh. keeping it real (whatever that means, but its US  
> election times, init?)
> Sounds like the two probs may be related, I/O issue? Dunno, more info  
> please.
> 
> >>
> > Sounds like release versions changing write cache settings?
> >
> 
> Could be caching related, cannot comment without further info. Come on  
> John boy, we know you are good for it.
> What's you base I/O like? has that also degraded?
> 
> >> Not sure how relevant all of this is to browsing using firefox  
> >> though;)
> >
> > Not very, but interesting nonetheless. Anyway, if we stay on topic  
> > people get bored ;-)
> >
> 
> Indeed, changed the subject for you as well.
> 
> > Vin
> > -- 
> 
> regards,
> Conor.
> 
>