vBulletin How to Optimize APC Cache

I have used Vbulletin Suite 4.2.2 P1,
My VPS in in DigitalOcean. (ram 1gb, 1 core CPU, 30gb SSD)
My visit: 2000visit/day

How to config APC Cache Optimize?

I have config APC.ini :

Code:

extension=apc.so
apc.enabled=1
apc.shm_size=128M
apc.shm_segments=1
apc.ttl=7200
apc.user_ttl=7200
apc.gc_ttl=3600
apc.enable_cli=1
apc.stat=1
apc.mmap_file_mask = /tmp/apc.XXXXXX
; new settings added in v1.2.2-eva2000.16
apc.optimization=0
apc.num_files_hint=4096
apc.user_entries_hint=4096
apc.localcache=1
apc.localcache.size=2048
apc.slam_defense=0
apc.write_lock=1
apc.include_once_override=0

it is right or wrong

2) How to config ngx_pagespeed for vbulletin suitle 4.2.2 P1

Thanks

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Thank @eva2000

How to choosing to map to Ram or SSD? => apc.mmap_file_mask = /tmp/apc.XXXXXX