AIX pinned memory

Howdy listers,  

This is actually more of a Unix question, but it is also Oracle related and I know there are a lot of people on this list more experienced than I with Unix so I figured I'd give it a shot.  

I'm running Oracle 10.2.0.2 on AIX 5.3 and am using the pinned SGA feature (lock_sga=true & v_pinshm=1). I'm also using the large (16MB) pages, but I'm not sure if that is relevant.  

The problem is that the output of vmstat -v and svmon -G both show that I have about 1.9million pages (1.9M*4K=7.2G) that are currently pinned, however my Oracle SGA is only 3G, so I'm concerned about the other 4.2GB that appear to be pinned. We aren't having any paging or swapping or other performance problems so this is just a curiosity at this point.  

I've tried "svmon -P -t 200 -p" to get the top 200 processes sorted by their pinned memory and when I added it all up - it was only about 3.5GB. So, how can I figure out what else is accounting for the extra pinned memory? My fear is that maybe it is still being pinned from previous startups of the Oracle instance and now it is just being wasted, which would mean that it might waste another 3GB if I restarted the instance w/o rebooting.  

Any ideas?  

Thanks,
Brandon  

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