Hello,

I've enabled caching on php scripts as below but it looks like the server is not caching at all:

http {
fastcgi_cache_path /tmp/cache levels=1:2
keys_zone=tmp:10m
inactive=5m;

server {
location / {
...
fastcgi_cache tmp;
fastcgi_cache_valid any 1h;
fastcgi_cache_min_uses 1;
...
}
}
}

- but the caching directory is totally empty (nginx has write privileges as it was created by nginx itself during reload)
- I haven't noticed any performance improvements by running apache benchmark from different machine

Logs:

2011/07/04 07:53:59 [notice] 1082#0: start cache manager process 1088
2011/07/04 07:53:59 [notice] 1082#0: start cache loader process 1089
2011/07/04 07:54:59 [notice] 1089#0: http file cache: /tmp/cache 0.000M, bsize: 4096
2011/07/04 07:54:59 [notice] 1082#0: signal 17 (SIGCHLD) received
2011/07/04 07:54:59 [notice] 1082#0: cache loader process 1089 exited with code 0
2011/07/04 07:54:59 [notice] 1082#0: signal 29 (SIGIO) received

OS: CentOS 5.6
Nginx version: nginx/0.8.54

Could you help me to solve this please.