title: APC: apc_fetch returns false often, but sometimes success
body: <ul>
  <li>APC Version : 3.1.9.</li>
  <li>PHP Version : 5.2.17</li>
  <li>i use Litespeed</li>
  <li>DEFAULT PHP: 5</li>
  <li>PHP4 SAPI: cgi</li>
  <li>PHP5 SAPI: dso</li>
  <li>SUEXEC: enabled</li>
  </ul>
  
  <p>I create 2 file.
  First file, set apc var :</p>
  
  <pre><code>&lt;?php
  $bar = 'BAR';
  apc_store('foo_test', $bar);
  echo 'stored';
  ?&gt;
  </code></pre>
  
  <p>Second file, try to get apc var :</p>
  
  <pre><code>&lt;?php
  var_dump(apc_fetch('foo_test'));
  ?&gt;
  </code></pre>
  
  <p>I visited first file, everything is fine.
  I open second file, i refresh several times, usually (almost 90%), it returns false. And rarely returns correct response.</p>
  
  <p>Here is my APC setting.</p>
  
  <pre><code>apc.cache_by_default    1
  apc.canonicalize    1
  apc.coredump_unmap  0
  apc.enable_cli  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   20M
  apc.mmap_file_mask  
  apc.num_files_hint  1000
  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  default
  apc.shm_segments    1
  apc.shm_size    512M
  apc.slam_defense    1
  apc.stat    0
  apc.stat_ctime  0
  apc.ttl 0
  apc.use_request_time    1
  apc.user_entries_hint   4096
  apc.user_ttl    7200
  apc.write_lock  1
  </code></pre>