APC.PHP tells me:
Uptime 2 days, 15 hours and 13 minutes File Upload Support 1 File Cache Information Cached Files 375 ( 53.5 MBytes) Hits 377684 Misses 376 Request Rate (hits, misses) 1.66 cache requests/second Hit Rate 1.66 cache requests/second Miss Rate 0.00 cache requests/second Insert Rate 0.00 cache requests/second Cache full count 0 User Cache Information Cached Variables 573 ( 2.3 MBytes) Hits 77569 Misses 889 Request Rate (hits, misses) 0.34 cache requests/second Hit Rate 0.34 cache requests/second Miss Rate 0.00 cache requests/second Insert Rate 0.06 cache requests/second Cache full count 0 "Fragmentation: 100.00% ( 8.0 MBytes out of 8.0 MBytes in 95 fragments)"
apc.shm_segments 1 apc.shm_size 64M apc.slam_defense 0 apc.stat 1 apc.stat_ctime 0 apc.ttl 3600 apc.user_ttl 3600 apc.max_file_size 1M apc.gc_ttl 3600
Amazon EC2 micro instance, running a very small wordpress site with few visitors and about 8 plugins.
1) Does it matter if fragmentation becomes 100%? Does it impact performance in any way?
2) Why does fragmentation not go down?
I thought it is supposed to free up space automatically when you set the ttl to > 0
3) Why does the Cache full count not increment despite being at 100% fragmentation for over 24 hours?
4) I am using APC version 3.1.7 is it worth upgrading to the latest version? (it seems more complex to use latest version due to dependencies, so I prefer to avoid if possible)