I have a website with load of about 60 000 requests per minute served by nginx. Recently, I have enabled the
open file cache and saw a dramatic improvement in performance. But in the evenenings, when loads is maximum, response times are still quite large and nginx uses a lot of IO.
Here are my current settings:
open_file_cache max=10000 inactive=30s; open_file_cache_valid 60s; open_file_cache_min_uses 2; open_file_cache_errors on;
And I still have some memory left:
free -m total used free shared buffers cached Mem: 7910 6917 992 0 439 885 -/+ buffers/cache: 5592 2317 Swap: 8099 0 8099
Question: now do I choose correct value for
open_file_cache max=10000 and other parameters? Is 10000 enough, is it too small or big? Is there a way to monitor open file cache use?