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From Brian Pane <brian.p...@cnet.com>
Subject Re: What is the source of this 'Thundering herd' redux?
Date Fri, 03 Jan 2003 05:56:25 GMT
On Thu, 2003-01-02 at 19:23, Steven Roussey wrote:
> > Can you grab a stack trace from each of the httpd processes (e.g.,
> > with pstack, or by scripting gdb) to see what they're doing when
> > the load drops to zero?
> 
> Yes, but... pstack does not find any symbols (gdb does). Any way around
> this? Am I compiling apache incorrectly?

pstack should be able to find the symbols if you compile and
link with -g

> > Also, does netstat show connections piling up in 'established' 
> > state on the port on which your httpd is listening?
> 
> Yes, even while idle is high. What does this mean???

That suggests that the kernel is able to handle connection
setup properly; i.e., the problem isn't that the TCP stack
is messed up.  That helps isolate the problem a bit.

Brian



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