topic Process Group vs Process Group Instance in Open Q&A

Process Group vs Process Group Instance

himanshu_mor — Wed, 17 Mar 2021 12:54:41 GMT

Hi Guys,

what is the difference between Process group and Process group instance?

Thanks

Himanshu Mor

Re: Process Group vs Process Group Instance

franz_soengen — Tue, 03 Dec 2024 13:11:36 GMT

Hi Himanshu,

Dynatrace automatically detects abstract Process Groups from processes that are performing the same functions across multiple hosts. So if you e.g. have 3 Tomcats on 3 Hosts that accomplish the same tasks it's assumed that they are similar so they would be one Process Group. You can also manually modify how Process groups are detected.

Every one of these 3 tomcats would then be a Process Group Instance of the detected Process Group. So one Process Group can have multiple Process Group Instances. These often map to the physical processes but they don't necessarily have to because e.g. Dynatrace treats all the worker processes as one Process Group Instance.

best regards
Franz

Re: Process Group vs Process Group Instance

himanshu_mor — Wed, 10 Oct 2018 05:28:07 GMT

Thanks @Franz S. ! so does that mean that a PROCESS GROUP INSTANCE is same as a PROCESS detected by dynatrace?

Re: Process Group vs Process Group Instance

franz_soengen — Wed, 10 Oct 2018 08:18:09 GMT

Hi Himanshu,

yes, Process Group Instances are just called Processes in the UI. These just don't always have to correspond one-to-one to the physical processes running on the machine.

Example: If you have an Apache Webserver and it has many worker processes, Dynatrace will only display one Process/Process Group Instance for a single host.
If you have another Apache Webserver on another host running that delivers the same application, Dynatrace will put both these Process Group Instances in one Process Group.

best regards
Franz

Re: Process Group vs Process Group Instance

himanshu_mor — Wed, 10 Oct 2018 08:23:42 GMT

Hey @Franz S. , Thanks for clarifying!!