调整APC参数:
; configuration for php apc module
extension=apc.so
apc.enabled=1
apc.cache_by_default = On
apc.enable_cli = Off
apc.ttl = 0
apc.user_ttl = 0
apc.gc_ttl = 3600
apc.include_once_override = Off
apc.max_file_size = 1M
apc.num_files_hint = 1000
apc.optimization = 0
apc.shm_segments = 1
apc.shm_size=256
apc.slam_defense = 0
apc.stat =Off
apc.user_entries_hint = 0
apc.write_lock = On