title: Mysql service won't start, InnoDB init function error
body: <p>So seemingly out of nowhere tonight, my wordpress site went down and I've traced it to problems with mysql. Mysql won't start on the server because it keeps failing.</p>
  
  <p>Here is what I'm getting from the logs:</p>
  
  <pre><code>140226 08:54:11 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
  140226 08:58:20 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
  140226  8:58:20 [Note] Plugin 'FEDERATED' is disabled.
  140226  8:58:20 InnoDB: The InnoDB memory heap is disabled
  140226  8:58:20 InnoDB: Mutexes and rw_locks use GCC atomic builtins
  140226  8:58:20 InnoDB: Compressed tables use zlib 1.2.3
  140226  8:58:20 InnoDB: Using Linux native AIO
  /usr/libexec/mysqld: Can't create/write to file '/dev/shm/mysql/ibOqUOjF' (Errcode: 2)
  140226  8:58:20  InnoDB: Error: unable to create temporary file; errno: 2
  140226  8:58:20 [ERROR] Plugin 'InnoDB' init function returned error.
  140226  8:58:20 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
  140226  8:58:20 [ERROR] Unknown/unsupported storage engine: InnoDB
  140226  8:58:20 [ERROR] Aborting
  </code></pre>
  
  <p>I've tried Googling and looking here on Stack Overflow, but I can't seem to find many solutions except to delete the ipdata1 and log files which, as I've read, shouldn't be done with stored data because it would mess up my tables.</p>
  
  <p>This is on an NGINX CentOS 6 server.</p>
  
  <p>Any ideas? I appreciate the help!</p>