This is a utility which will count which
pages of a file are in core (ie in the 
kernel buffer cache).



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The utility is called pgs (pages) and its usage is:

   pgs [-s [-h]] file ...

So, suggested use is:
 
     0. Put 'pgs' somewhere, eg: /tmp
     1. cd to the db subdirectory of the vob storage directory
     2. Type (eg) "/tmp/pgs vob_db.d0* vob_db.k*"

This will get you get info all the database files
in a particular VOB. I also include a script 'allvobs' to extract this 
information for all VOBs on a VOB server. This script assumes
that the 'pgs' executable has been put in /tmp; you may want to 
change that. Also, you may find it more convenient to only get 
summary information (use the -s flag to pgs). Feel free to edit the
script aas you please.

The -s option prints the total (summary) information only.
The -h option when used with -s suppresses printing of the heading.
These options are intended for use with cron jobs that monitor how
much of each VOB is in the buffer cache.


The (full) output should look like

vob_db.d01: 
          in core pages:    12805
      not in core pages:    12061
            total pages:    24866      ( 51.50% in core) 
vob_db.d02: 
          in core pages:    37055
      not in core pages:     1733
            total pages:    38788      ( 95.53% in core) 
vob_db.d03: 
          in core pages:     6855
      not in core pages:      733
            total pages:     7588      ( 90.34% in core) 
vob_db.k01: 
          in core pages:     9559
      not in core pages:     4015
            total pages:    13574      ( 70.42% in core) 
vob_db.k02: 
          in core pages:     6412
      not in core pages:    15842
            total pages:    22254      ( 28.81% in core) 
vob_db.k03: 
          in core pages:     7622
      not in core pages:      856
            total pages:     8478      ( 89.90% in core) 
vob_db.k04: 
          in core pages:     2521
      not in core pages:      577
            total pages:     3098      ( 81.38% in core)
----------------------------------------------------
    total in core pages:    79277
total not in core pages:    39369
            total pages:   118646      ( 66.82% in core) 

total in core bytes:    324718592
        total bytes:    485974016