Configure APC for maximum hit rate

Posted by Steven De Groote on Server Fault See other posts from Server Fault or by Steven De Groote
Published on 2012-12-01T09:10:57Z Indexed on 2012/12/01 11:07 UTC
Read the original article Hit count: 202

Filed under:

configuration

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php5

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php-apc

I'm currently running php5 with APC, the latter with default configuration. However after setting up munin to monitor APC, I'm surprised by the results:

apc.shm_size: 30
apc.gc_ttl: 3600
apc.ttl: 0
Used: 14MB
Request rate: 100 requests/second
Fragmentation: 0
Hit ratio: 80% (dropping to 0 a few times per hour)

So the obvious question: how can I adapt the configuration to achieve a higher hitrate. I find it very strange that the available memory is not fully used which the hitratio is still below what I would expect.

Thank for any hints!

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