title: Qcache_hits always 0
body: <p>On Centos 6.3 I'm trying to enable query caching on Mysql.
  I have enabled query caching</p>
  <pre><code>SHOW VARIABLES LIKE 'query_cache_size';
  query_cache_size    52428800
  
  SHOW VARIABLES LIKE 'query_cache_type';
  query_cache_type    ON
  </code></pre>
  <p>When running a few simple select queries (select * from titles), the Qcache_hits always stays 0.</p>
  <p>(I'm using these sample mysql database: <a href="https://launchpad.net/test-db/+download" rel="nofollow noreferrer">https://launchpad.net/test-db/+download</a>)</p>
  <pre><code>show status like &quot;Qcache%&quot;;
  Qcache_free_blocks  1
  Qcache_free_memory  52419904
  Qcache_hits 0
  Qcache_inserts  0
  Qcache_lowmem_prunes    0
  Qcache_not_cached   50
  Qcache_queries_in_cache 0
  Qcache_total_blocks 1
  </code></pre>
  <p>I'm out of options figuring out what's wrong here.
  Does anyone have an idea what can be wrong?</p>