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Posted to modules-dev@httpd.apache.org by Chuck Stein <st...@geofusion.com> on 2011/12/15 21:23:05 UTC
mem_cache + module, sometimes cache seems not to work
I have my own module that supplies tiles of data I use mod_cache and
mod_mem_cache to minimize the disk access of my module as there are many
requests for the same tiles. I am running on a LAN with a fixed number
of clients and using mpm worker.
StartServers 2
MaxClients 192
MinSpareThreads 25
MaxSpareThreads 75
ThreadsPerChild 64
MaxRequestsPerChild 0
From my modules logs I see the second child-server created makes
repeated accesses to to the same tiles. This should not be happening,
the repeated requests should not even get to my module because they
should be served from cache. The vast majority of tiles are served from
cache. I am seeing this when using ab (benchmark tool) with a single
request so the tile is not getting pushed out of cache. Out of 70,000
requests for the same tile, 64 are getting through to my module when I
would expect one or two.
Any ideas appreciated,
Chuck