https://blog.foundev.pro/tags/gc.htmlRecent content in Gc on Random RamblingsHugoen-usWed, 03 Feb 2021 00:00:00 +0000https://blog.foundev.pro/2021/02/03/heap-size-around-31gb.htmlWed, 03 Feb 2021 00:00:00 +0000https://blog.foundev.pro/2021/02/03/heap-size-around-31gb.html<h1>Heap Size Around 32 GB</h1> note: originally written Feb 3 2021 <p>There was a question this morning around a pretty common discussion point around 31 gb versus 32 gb of heap. This <a href="http://java-performance.info/over-32g-heap-java/">article discusses this in more detail</a>, the key point follows:</p> <blockquote> <p>Be careful when you increase your application heap size over 32G (from under 32G to over 32G) – JVM switches to 64 bit object references at that moment, which means that your application may end up with less available heap space. A rule of thumb is to jump from 32G right to 37-38G and continue adding memory from that point. The actual area of “grey” territory depends on your application – the bigger an average Java object in your application, the smaller is the overhead.</p>