Question
Evaluate the Heap Size for JVM and JVM count
Hi All,
Please clarify the following queries to evaluate the Heap Size for JVM and JVM count required:
1. How to validate the list of JVM count and heap size required before the start of installation or application?
2. Do we have any specific formula and thumb rule to calculate the total number of JVM based on the below parameters?
- Total number of service requests
- Total number of Decision requests
- Total number of estimated concurrent users
- Total number of estimated concurrent occasional users (percentage of occasional users that might be concurrent during a peak hour)
- Estimated clipboard size
3. How to conclude the total heap size based on the number of concurrent users (1000), total heap size and average clipboard size of a user is 5 MB per a day. Any suggestions?
10000 * 5 / 1024 = 4.8 GB and adding a contingency of 2 GB.So. the total heap size that need to be considered could be projected as 8 GB (or) any other points need to considered for future growth and performance.
Regards
SVA Quest.
Pegasystems Inc.
IN
Hi,
There are few recommendation you can refer below.
https://community.pega.com/system/files/pdfs/Pega722_Install_Tomcat_Oracle_2.pdf (page 39)
Check similar document for your application server.
https://community.pega.com/knowledgebase/articles/jvm-configuration-best-practices
This should guide you to some extant, as lot of these calculation are done after performing load testing
Thank You
Tata Consultancy Services Ltd
AU
Thanks Shekhar for the details.
It could be different from one application to other application, I am looking for the few examples to take a conclusion.
It is related to the sizing, generally the call would be taken initially. Based on the NFT/performance testing, assessment could be made whether to increase the memory or not.
Regards
SVAQuest