System hang problem. 2006-10-04 - By Arjan van de Ven
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On Tue, 2006-10-03 at 15:23 -0700, Manish Neema wrote:
> We see this problem frequently on RHEL3.0 U5 and U7. System would
> completely hang upon memory shortage. The only option left is
> power-cycle (or 'sysrq + b'). System hang occurs with any of the below 3
> overcommit settings:
is this a 32 bit system?
With a larger amount of memory, a 32 bit system can get into really
nasty situations, and in fact you can be OOM even if you have gigabytes
of memory available! (just of the wrong kind).
Using the -hugemem kernel helps some there (esp if you have 8Gb of ram
or more), but fundamentally it's an unsolvable issue. Not that rhel3
does a good job at even trying, but still.
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