I am on LAMP with Alternative PHP Cache. It worked fine until yesterday when I updated the website and changed a few mySQL queries (I don't see the how it would affect APC opcode cache)
Today I see that the load has increased on the server and I see in Alternative PHP Cache, that the uptime of APC is somewhere around 15 minutes then it gets restarted.
At this point the APC cache is only about 20% full of the available 30Mb. Using for opcode cache only. During this 15 minutes the cache works fine (99,8% cache hits). After this unwanted restart the APC cache is empty. Why is it restarting? Where can I find the logs for it?