Question2Replies1449Views NickP984 Member since 2016 4 posts CRICO Posted: January 2, 2018Last activity: January 3, 2018 Closed Solved VM Setup / ArchitectureI plan to install Pega 7.3.1 (Tomcat 8.5 + PostgreSQL 9.6) on a sandbox VM and have some (potentially very basic) questions on the initial setup:The installation guide recommends 4GB for the "system heap size" and 8GB for the "host application server". What is the difference between the two? Does this mean I need a VM with at least 12GB RAM?I have limited experience with VM's / app servers / networking - what is the architectural structure of all this / are my below bullet points wrong? The app and db servers are installed on the VMThe VM runs both the app and db servers (PRPC is installed on the app server, not the VM?)I need to connect to the VM to start/stop the server, etc.I don't need to be connected to the VM to log into designer studio?Apologies for the pretty generic questions - trying to understand what exactly goes into spinning up an environment / what's happening behind the scenes.Thanks! System Administration Low-Code App Development Installation and Deployment ×Close popoverFacebookTwitterLinkedinEmail Copy Link Copied! Moderation Team has archived post This thread is closed to future replies. Content and links will no longer be updated. If you have the same/similar Question, please write a new Question. Accepted Solution Posted: 2 years agoArun_Mahanty PEGA replied to NickP984Hello Nick, VM is nothing but it takes some physical memory(RAM) from the system . Database and Application server are installed on the VM . Pega will be installed on the database that means all the default process commander rules will be created through this . Now your application server requires a deployment file prweb and other archive’s prsysmgmt,prhelp(For SMA ,Help) and database connection to bring up the Pega Application . You need to connect to the VM if you want to restart the database and application server . your application server requires some heap to run the pega application . Standard suggested system heap size is 4 - 8 GB based on monitoring of memory usage and garbage collection frequency. Suppose if you have RAM around 10 GB you can start allocating heap for Pega application 4GB . Through –XMX option you can increase the heap size based on your application requirement . Thanks, Arun Posted: 2 years agoSudhakarReddy PEGA replied to NickP984Hi, Based on number of requestors usually allocating the heapmemory, minimum requirement for application is between 4 to 8 GB.