title: APC Cache Configuration
body: <p>I'm very new to APC Cache with PHP-FPM. Below are my current settings for a nginx/php webserver serving dynamic pages - 4GB RAM.</p>
  
  <p>Do I need to have 'User Cache' enabled? as it doesn't appear to be used.</p>
  
  <p>Also can anyone give any advice around these settings - I'm currently reading, learning and attempting to tune this but any advice would be greatly appreciated. thx</p>
  
  <p>Note: the settings run out of php.ini (I assume that is standard).</p>
  
  <pre><code>General Cache Information
  APC Version 3.1.15-dev
  PHP Version 5.4.23
  
  Server Software nginx/1.4.4
  Shared Memory   1 Segment(s) with 64.0 MBytes 
  (mmap memory, pthread mutex Locks locking)
  Start Time  2014/01/04 05:04:13
  Uptime  22 minutes
  File Upload Support 1
  
  File Cache Information
  Cached Files    13 (483.2 KBytes)
  Hits    51655
  Misses  18
  Request Rate (hits, misses) 38.71 cache requests/second
  Hit Rate    38.69 cache requests/second
  Miss Rate   0.01 cache requests/second
  Insert Rate 0.01 cache requests/second
  Cache full count    0
  
  User Cache Information
  Cached Variables    0 ( 0.0 Bytes)
  Hits    0
  Misses  0
  Request Rate (hits, misses) 0.00 cache requests/second
  Hit Rate    0.00 cache requests/second
  Miss Rate   0.00 cache requests/second
  Insert Rate 0.00 cache requests/second
  Cache full count    0
  
  Runtime Settings
  apc.cache_by_default    1
  apc.canonicalize    1
  apc.coredump_unmap  0
  apc.enable_cli  0
  apc.enable_opcode_cache 1
  apc.enabled 1
  apc.file_md5    0
  apc.file_update_protection  2
  apc.filters 
  apc.gc_ttl  3600
  apc.include_once_override   0
  apc.lazy_classes    0
  apc.lazy_functions  0
  apc.max_file_size   2M
  apc.mmap_file_mask  /tmp/apc.vaREsm
  apc.num_files_hint  1024
  apc.preload_path    
  apc.report_autofilter   0
  apc.rfc1867 0
  apc.rfc1867_freq    0
  apc.rfc1867_name    APC_UPLOAD_PROGRESS
  apc.rfc1867_prefix  upload_
  apc.rfc1867_ttl 3600
  apc.serializer  igbinary
  apc.shm_segments    1
  apc.shm_size    64M
  apc.shm_strings_buffer  8M
  apc.slam_defense    0
  apc.stat    1
  apc.stat_ctime  0
  apc.ttl 7200
  apc.use_request_time    1
  apc.user_entries_hint   4096
  apc.user_ttl    7200
  apc.write_lock  1
  </code></pre>