title: WordPress and APC's 'Unable to allocate memory for pool"
body: <p>I have a typical cPanel server running the usuals where I'm running about ~20 small WordPress sites. Each site has W3TC installed and configured with the recommended settings. The server has 2GB of RAM.</p>
  
  <p>Now, every so often, I'll run across the 'Unable to allocate memory pool' error. I've gone through <a href="https://stackoverflow.com/questions/3723316/what-is-causing-unable-to-allocate-memory-for-pool-in-php">this</a> particular question and its answer, in detail, many a times. I've tried what was suggested there, but it hasn't helped, so I was hoping to get some answers for my case.</p>
  
  <p>The APC shmsize is currently set to 256M right now. APC.ttl is 120 and APC.gc_ttl is 3600. </p>
  
  <p>Why am I still seeing errors? Is it recommended that I increase the shmsize even more? Or I'm missing something else here?</p>
  
  <p>Thanks.</p>