I&#x27;ve worked at a company that was doing &gt; 20,000 TPS (transactions&#x2F;sec) on a single PG instance with no problem.  That is baby-tier usage for a DB.<p>As far as why you should give up MySQL like I did four years ago:  <a href="http:&#x2F;&#x2F;grimoire.ca&#x2F;mysql&#x2F;choose-something-else" rel="nofollow">http:&#x2F;&#x2F;grimoire.ca&#x2F;mysql&#x2F;choose-something-else</a>