Hi All, We are upgrading our Appian from 73 to 75, as we know that afhttps://community.appian.com/discussions/f/administration/2810/hi-all-we-are-upgrading-our-appian-from-73-to-75-as-we-know-that-afHi All, We are upgrading our Appian from 73 to 75, as we know that after 7.0 most of the process or activities get shifted from engine to jboss. So could you please let us know the default heap size for Appian 75??... OriginalPostID-112106 OriginalPostIDen-USTelligent Community 12RE: Hi All,<br /><br />We are upgrading our Appian from 73 to 75, as we know that afhttps://community.appian.com/thread/9854?ContentTypeID=1Fri, 06 Jun 2014 18:29:10 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:62e65719-5480-467b-9585-83302118e935Aleksi WhiteDo you mean 60-65GB? It&#39;s difficult to say what heap size would be best without considerable analysis, but the following formula might help:<br />(heap size) + (number of threads)x(thread stack size) = (total RAM used by JVM process)<div style="clear:both;"></div>RE: Hi All,<br /><br />We are upgrading our Appian from 73 to 75, as we know that afhttps://community.appian.com/thread/9836?ContentTypeID=1Fri, 06 Jun 2014 10:01:36 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:30bf1976-37c6-496a-abfd-6a2b3407378dgauravpThanks Aleksi.<br /><br />What could be the best heap size considoring almost 60 to 65 RAM usage and we have almost 14 applications deployed on sever.??<div style="clear:both;"></div>RE: Hi All,<br /><br />We are upgrading our Appian from 73 to 75, as we know that afhttps://community.appian.com/thread/9834?ContentTypeID=1Fri, 06 Jun 2014 01:41:12 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:6756d233-3a1b-4b63-a4bf-7df5b562c909Aleksi WhiteThe heap size will be determined in JBoss, using the arguments -Xms (minimum heap size) and -Xmx (maximum heap size). I believe the default will be -Xms2048m -Xmx2048m<div style="clear:both;"></div>