[naviserver-devel] better ns_cache statistics

[Gustaf N. <ne...@wu...>]

Hi there,

determining a good cache size and useful time-out-values is a 
non-trivial task.
ns_cache_stats returns already some useful satistics, but i would say, 
at least two
important figures are missing, which are subsumed by the # of flushes. 
Actually,
there are at least 3 kind of flushes:
  a) expires  (entry is too old)
  b) prunes  (entry thrown out of the cache due to space competition)
  c) intentional flushes (flush command, deletion of an entry, etc.)

Currently, nscache lumbs a+b+c under flushes. It would be nice
to obtain separate values for these kinds of flushes to get some
idea, whether or not a cache behaves like expected, or whether it
should be increased or decreased.

what do you think?

-gustaf