On 27/09/2008, at 1:02 PM, Jeremy Chadwick wrote:
Anyway, I'd like to know why you have so many fds open
simultaneously in
the first place. We're talking over 11,000 fds actively open at
once --
this is not a small number. What exactly is this machine doing? Are
you absolutely certain tuning this higher is justified? Have you
looked
into the possibility that you have a program which is exhausting fds
by
not closing them when finished? (Yes, this is quite common; I've seen
bad Java code cause this problem on Solaris.)
Well, there was a runaway process which looks like it is leaking fds.
We haven't solved it yet, but the fact that the maxfiles per machine
and the maxfiles per process were so close together was really causing
us grief for a while.
You're asking for trouble setting these values to the equivalent of
unlimited. Instead of asking "what would happen", you should be
asking
"why would I need to do that".
Regarding memory implications, the Handbook goes over it.
Unfortunately I've been unable to find it. While we fix the fd leak
I'd like to know how high I can push these numbers and not cause other
problems.
Ari Maniatis
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