Question
Okahara
Last activity: 18 Jun 2018 4:37 EDT
Memory usage question
Hi,
I have two questions regarding Pega's memory usage.
#1. Customer claims Pega uses a lot of memory (app server) comparing to scratch program in general. Is this a fair statement?
This is a very subjective and ambiguous comment, and I understand it is difficult even how to compare Pega and scratch in what way, but is this still same feeling that people kind of agree? Or does Java program in general use lots of memory than other programming languages? Since Pega loads a lot of out-of-the-box pages and properties in clipboard by default, maybe Pega is in general heavy? Just want to know people's perception and any insight is appreciated.
#2. We are implementing an application where users log in as guest thru the Internet. Since the number of users will become very high, I need to know how exactly Pega releases memory at app server side. We are not implementing a log off button as this is via Internet with SSO, but in that case, Internet user would close the Pega window by browser close button. How exactly will memory or session between app server and user be released? Does it make any difference from explicit log off?
Thanks,
***Edited by Moderator Marissa to update platform capability tags***
Pegasystems Inc.
IN
Hi There,
Pega internally depends on JVM to compile and execute the code so, the performance would depend on JVM involved.
Its true that if any user activity is done from Pega UI then it loads a lot of other content such as CSS, JS etc and hence it might appear to user that Java execution may have some more time than normal.
The stale requestoor gets cleaned by cleanup agents (https://collaborate.pega.com/question/deamons-agents-are-inactive-production-any-idea)
And moreover if the pages opened by certain requestor are closed, the memory related to the thread are released and further collected by GC.
Regards,
Ujjwal
Okahara
Hi,
Let me be a little bit more specific on question 2. Does below two scenarios make any difference on Pega's memory release operation? If so, could you explain about the process how exactly?
#1. User logs off.
#2. User closes the browser windows by x button.
Thanks,
Pegasystems Inc.
IN
Hi Satoshi,
When user loggs off, log off activity gets called and when x button is licked activity would not get called requestor would become stale and eventually gets cleaned off.
Regards,
Ujjwal