On Tue, 17 Dec 2002, Eric Rescorla wrote:
> Now consider what happens if you're running 512 virtual servers (IPs)
> with 256 child processes. If Slapper contacts all of them, it will
> freeze all your children and you're frozen until the timeouts
> happen. Joe, do you have more virtual servers than children?
No, my hard limit was raised to 2048 a long time ago. I was running a
soft limit of 600, which is somewhat above the number of IP interfaces.
Right now I'm down to 300, as I thought it might help avoid the problem...
but of course I run out of children from time to time. In any case, I
don't think the server could handle much more than the 600 right now
anyway, and I've never seen more than 300 Slapper log entries together
before the server bound up.
To me, it seems that Slapper is tying up the children alot more than
normal web request children.
I also have (or used to have... I've done quite a few tweaks to try to
solve this problem) Apache set up to answer more than one request... but I
guess this is irrelevant since it can only serve one request per child at
a time.
----Steve
Stephen Amadei
Dandy.NET! CTO
Atlantic City, NJ
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