Ext3 users - Dec 2013 - how to know ext cache hit rate?

how to know ext cache hit rate?
 
thanks
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On Wed, Dec 25, 2013 at 09:32:50AM +0800, fsluck wrote:
> how to know ext cache hit rate?
Which cache are you referring to, specifically?  The page cache?  The
inode cache?  The dentry cache?

What problem are you trying to solve, at a high level?

     	     	     	       	      - Ted

i think  it is page cache.
my case is in virualization environment,
because  vm's disk image is much larger than system's cache, i want to
know when many vms are running  if system cache hit rate is very  low?   if
there is a need to  seek for other way to suit virtualization.
 
system's default cache mechanism does not care about virtualization.
 
thanks 





At 2013-12-26 02:00:43,"Theodore Ts'o" <tytso@mit.edu>
wrote:
>On Wed, Dec 25, 2013 at 09:32:50AM +0800, fsluck wrote:
>> how to know ext cache hit rate?
>
>Which cache are you referring to, specifically?  The page cache?  The
>inode cache?  The dentry cache?
>
>What problem are you trying to solve, at a high level?
>
>     	     	     	       	      - Ted