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

Ivan Voras ivoras at
Wed Feb 20 13:53:29 UTC 2008

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

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

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