title: What's the best performance SQL database for data storage on CentOS 246MB RAM, Apache and PHP?
body: <p>What's the best performance SQL database for data storage on CentOS <strong>246MB RAM</strong>, Apache and PHP, json_encode() with using <strong>less RAM as possible</strong>?</p>
  
  <p>Maybe some <a href="http://en.wikipedia.org/wiki/NoSQL" rel="nofollow">NoSQL</a> database, <a href="http://en.wikipedia.org/wiki/UnQL" rel="nofollow">UnQL</a>?</p>
  
  <p>On right now I use MySQL, but 246MB RAM might be to little.</p>
  
  <p>Performance needed on selecting multiple tables, speed on reading data, not so much writings in db.</p>