I assume you are using the lastest version of 1.3. Try experimenting with the AcceptMutex config directive and see if selecting different values changes the behaviour you are seeing.
Bill > Hi, > > I have been trying to track down a nasty performance issue with apache > 1.3 on linux 2.4.18 (RH7.2). I have narrowed the list down to two > possible culprits (apache or the kernel). I use PHP as well, but I don't > think that is responsible. > > The load spikes that occur look like all the processes are waking up > (looking like the old 'thundering herd' problem). The odd thing is that > just prior, no processes are running and the idle % soars. > > http://www.network54.com/spikes/vmstat.txt > > It appears that nothing can accept an incoming connection (maybe one > process is supposed to, but does not) and so it then goes and wakes > everyone up to get it handled. > > Any guess as to why (and where in the code) this happens? > > The kernel people say it is not their problem, that it is an apache > issue. > > http://www.network54.com/spikes/ >
