(ITS#5178) [feature request] pcache stats & monitoring

[ando@sys-net.it]

Full_Name: Pierangelo Masarati
Version: HEAD/re24
OS: irrelevant
URL: ftp://ftp.openldap.org/incoming/
Submission from: (NULL) (193.203.230.29)
Submitted by: ando


This is a feature request for stats and monitoring capabilities for pcache;
basically:

- the number of cached queries
- the number of cached entries
- possibly, a list of cached queries in cachedQueryURL form
- how many times each cached query was used instead of re-running the request
- the ratio answerable / cacheable for each cacheable query
- some global figure like the average response time (send searchResult time -
start caching time) for each query, and the overall average.

Adding per-query info could be done by either extending the cachedQueryURL
format or by adding a child entry for each cached query (like connections and
other dynamic info).

p.