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Question

 Nicholas Priore (NickP984)
CRICO
Pega Development Lead
CRICO
US
NickP984 Member since 2016 4 posts
CRICO
Posted: Jan 2, 2018
Last activity: Jan 3, 2018
Posted: 2 Jan 2018 15:37 EST
Last activity: 3 Jan 2018 9:41 EST
Closed
Solved

VM Setup / Architecture

I 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:

  1. 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?
  2. I have limited experience with VM's / app servers / networking - what is the architectural structure of all this / are my below bullet points wrong?
    1. The app and db servers are installed on the VM
    2. The VM runs both the app and db servers (PRPC is installed on the app server, not the VM?)
    3. I need to connect to the VM to start/stop the server, etc.
    4. 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!

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System Administration
Installation and Deployment

Accepted Solution

Posted: 7 years ago
Posted: 3 Jan 2018 0:03 EST
Arun Kumar Mahanty (Arun_Mahanty)
Pegasystems Inc.
Principal Technical Solutions Engineer
Pegasystems Inc.
IN

Hello 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

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Posted: 7 years ago
Posted: 3 Jan 2018 5:42 EST
Sudhakar Reddy Yaparla (YSudhakarReddy)
JPMorgan Chase & Company

JPMorgan Chase & Company
US

Hi,

Based on number of requestors usually allocating the heapmemory, minimum requirement for application is between 4 to 8 GB. 

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