This is Just stuff i find on Oracle From various different sources or from my own personal experience
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Thursday, September 01, 2011
AIX Bug with 64K Memory Pages
After our Production Upgrade to 126.96.36.199 on AIX. we hit an AIX Bug relating to AIX starving Oracle from memory pages and thus grinding the system to a halt.. Metalink Doc 1088074.1 talk about this but there was conflicting information thru Doc ID 282036.1 which stops at AIX 6.1 TL5 for this particular bug.
It is the Bug is actually fixed in TL6 SP4 .
We were on TL6 SP2 and thus had a system outage.
Moral of the story is it always pays to ensure to look at future TL's and SP's for AIX to ensure the bug was actually fixed.