Verifying proxy cache operation

Can anyone suggest a means of verifying that my proxy cache (using the 
pcache overlay) is actually returning results from the cache and not the 
backend LDAP server?

I've got reams of debug output from slapd -d -1, but I'm unsure how to 
interpret it. I'm sure there are some magic strings within the output 
that would indicate the cache is being hit.

Any pointers would be appreciated.

The pcache db is bdb.

-- 
Liam Gretton                                    [email protected]
HPC Architect                                http://www.le.ac.uk/its/
IT Services                                   Tel: +44 (0)116 2522254
University Of Leicester, University Road
Leicestershire LE1 7RH, United Kingdom