Re: [squid-users] Help Needed: Any suggestion on performance downgrade after enable Cache Digest?

On Tue, Apr 22, 2008, Zhou, Bo(Bram) wrote:
> Adrian,
>
> I'm using RHE4 with kernel 2.6.9. I used top to collect CPU utilization and
> didn't use oprofile but just installed. I will use it to do profiling in the
> later testing session. Thanks for your reminder.

Make sure you also install the glibc library debug package.

Its also a good idea to graph/sample the top-level system stats - vmstat, netstat -in,
etc - I graph stuff on munin but munin's granularity is ~5 minutes and not near enough
to see transient events. This'll show things like context switch increases, syscall
count increases, traffic/packet rate increases, etc, which may be an aide in tracking
down what is going on.

Adrian

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