<a href="http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;9.5&#x2F;static&#x2F;brin-intro.html" rel="nofollow">http:&#x2F;&#x2F;www.postgresql.org&#x2F;docs&#x2F;9.5&#x2F;static&#x2F;brin-intro.html</a> If like me you were looking for what BRIN index is all about.