Determine Causes of Slowdown

Hi,

Most nights around 11.30 my server slows down drasticly. I have checked
the processes and nothing is using excessive resources.

I have had trouble finding resources that instruct a beginner in this
area on how to determine and eliminate the possible causes of the
slowdown.

Could someone point me to a resource or explain the basic steps and
software I need to use?

Thanks for your help,

Ben

On 14 Mar 2006 17:04:42 -0800, (E-Mail Removed) wrote:

>Most nights around 11.30 my server slows down drasticly. I have checked
>the processes and nothing is using excessive resources.

Clarify your query, what slows down? I you're thinking "my server"
think again, what aspect of a process is slowing down?

Possibilities include name lookups (resolver, name server, whatever),
download speed (network congestion), mail, ftp, http, what?

Grant.
--
Testing can show the presense of bugs, but not their absence.
-- Dijkstra

Hi Grant,

Thank you for the quick reply. It is just HTTP connections.

ftp, mail and ssh are unaffected.

Ben

On 14 Mar 2006 17:24:31 -0800, (E-Mail Removed) wrote:

>Hi Grant,
>
>Thank you for the quick reply. It is just HTTP connections.

Sigh... Please read http://cfaj.freeshell.org/google/

Now check for name lookups or net bandwidth congestion, my ISP's
nameserver gets overloaded at times -- usually end of business
hours -- you need to identify what's happening where you are.

For example I had name lookup failures (web pages fail to load,
load on retry), installed dnsmasq, turned on debug and watched
the nameserver-caching in action...

Grant.
--
Memory fault -- brain fried