Re: nothing to do with apache. What size disk cache ?

[Randy Terbush <ra...@zyzzyva.com>]

If you have the program 'monitor' installed, it can tell you
quite a bit about the cache hit rate. You can then fiddle
the kernel variables up and down to see what works.
20-30mb seems high. I have to run our HP NFS servers with
variables bumped to seemingly ridiculous numbers. I'll
take notice of the size of disk cache next time I'm in
there.


> 
> hit 'd' now if you don't want to read mail that has nothing to do with
> apache.
> 
> I thought I'd make use of some of the unix expertise out there.
> 
> I've been using a performance monitor on out HP systems, and I keep seeing
> a large chunk of our 64mb (per machine) being swallowed by so called
> disk cache. We often loose 20-30mb to the disk cache, and not being
> fluent in kernel internals we've no idea if this is a big problem, but it
> certainly looks bad.
> 
> Anyone know what a realistic value should be, and if we need to change it,
> how to do it. There's a big list of HP kernel settings available, but it's
> not clear which one needs changing.
> 
> Anyone ?
> 
> 
> rob