On Jan 9, 2014, at 8:18 PM, Gary Trakhman <gary.trakh...@gmail.com> wrote: > From the other direction, tuning a super-fast GC occasionally is way more fun > than malloc/free! > > I just found that enabling G1 was a quick hit for me. When I run that many > clojure processes, some 700MB heaps mostly wasted at steady-state tends to > hurt. As far as I can tell, there's no performance hit by doing so, and it > will be the default eventually.
FWIW, at World Singles, we were running our app servers (Tomcat 6 / Railo 3.3.4 / Clojure 1.5.1) with 4GB heaps on Java 6 and sometimes running into thrashing GC. We upgraded to Tomcat 7 / Railo 4 (same Clojure) and run with 8GB heaps now on Java 7 with the G1 collector and it has been wonderful :) The JVM is a wonderful beast if you're not memory constrained. Sean Corfield -- (904) 302-SEAN An Architect's View -- http://corfield.org/ "Perfection is the enemy of the good." -- Gustave Flaubert, French realist novelist (1821-1880)
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