System perforamance 4.x vs. 5.x and 6.x

Bill Moran wmoran at
Wed Feb 20 14:23:34 UTC 2008

In response to Ivan Voras <ivoras at>:

> Bill Moran wrote:
> > In response to Brett Bump <bbump at>:
> >> I'm seeing signal 6's on apache and imapd (never happened before)
> >> network errors, serious response time errors and generally poor
> >> performance during peak activity (same box, same people).
> > 
> > IIRC, signal 6 is an indicator that you've compiled binaries that are
> > almost, but not quite compatible with your CPU.
> You probably mean signals 4 (SIGILL) or 10 (SIGBUS), rather than 6
> (SIGABRT) :)
> I was getting a lot of SIGABRTs once, but that turned out to be due to
> PHP module order bogosity and linking mismatched threaded libraries into
> apache.

You're quite likely correct.

Bill Moran
Collaborative Fusion Inc.

wmoran at
Phone: 412-422-3463x4023

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