Why is my file system cache so large


 
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Operating Systems AIX Why is my file system cache so large
# 1  
Old 12-05-2006
Why is my file system cache so large

Hi
I have a filesystem cache which is around 20G in size and I'm a bit perplexed as to what is in it.

I'm running Sybase on the machine with the db on raw volumes and a tempdb on a ramdisk.

My understanding is that raw volumes are not cached and I assumed that the ramdisk is not either. Am I wrong about this? How can I see what is in the cache? Are ramdisks cached in the fs cache? If they are can I use ramdisks as raw devices? Lots of questions I know but I've trawled and trawled the Net and can't seem to find anything on this topic.

TIA
Mark
# 2  
Old 12-12-2006
man vmo and you should get it.
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