lockups using Oracle10g on SUSE9.3 2005-09-11 - By Mike Tierney
> -- --Original Message-- --
> From: Clayton [mailto:smaug42@(protected)]
>
> > a typical freeze is very uncommon for Oracle!
>
> I know. That's what baffles me.
>
> > If a unix system behaves like this it's to 99% hardware and to 90% RAM.
> > Even if switching to oracle might indicate a problem with ORACLE.
> > Triple check your RAM.
> > If possible remove 512MB each at a time and retry.
> > I don't believe it has something to do with non-certified SuSE 9.3.
>
> I desperately hope it's not RAM. My last system died due to RAM issues
> - it did mean IT was able to upgrade me to a nice shiny new AMD64 though
:-)
>
> I've done RAM tests on this computer about a month ago.. let it
> memtest86 run over a weekend. No errors. I will drop it
> into memtest86
> again this weekend.
>
> No lockups with any other heavy system loads.
RAM issues can be VERY hard to diagnose. The first Opteron server that we
got had a faulty DIMM in it and it was a real pain to diagnose!
Memtest for 24 hours turned up nothing at all. However Oracle would
mysteriously cause the system to lock.
The problem only seemed to occur under heavy I/O loads. In the end I
discovered that running 3 or 4 simultaneous bonnie's would do the trick
(i.e. it would freeze in under 5 minutes). I used that method to pin down
which RAM was faulty.
Hope that helps!
Cheers
Mike
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