[ic] RPC traffic settings
Peter
peter at pajamian.dhs.org
Sun Mar 10 06:24:24 UTC 2013
On 03/10/2013 06:49 PM, Grant wrote:
> It sounds like Mark is explaining how PreForkSingleFork works there.
> Are you sure setting SIGCHLD to IGNORE is different from setting
> PreForkSingleFork?
Yes, it sounds to me like he's saying that you can accomplish relatively
the same thing that double-forking would accomplish by setting SIGCHLD
to IGNORE, but still reap the performance benefits of single-forking.
My reading of Perl docs supports this as well. See perldoc perlipc and
search for "CHLD".
Peter
> I tried it but no luck. Same result in less time. I also tried
> without ChildLife.
I find this (new) bit of info very interesting, it seems to suggest that
the problem occurs when children are destroyed. I think that perhaps
it's leaving zombie processes and these are somehow preventing
Interchange from spawning new ones. If this is the case then setting
SIGCHLD to IGNORE may indeed solve your problem. Try adding this line
into your bin/interchange file inside one of the BEGIN blocks (probably
where it has all those commented out $ENV... lines:
$SIG{CHLD} = 'IGNORE';
Peter
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