topic Re: How JVM settings between Main Job and Sub Job Works? in Talend Studio

How JVM settings between Main Job and Sub Job Works?

ashif2 — Wed, 07 Mar 2018 19:22:28 GMT

Consider a scenario where my main job is left with default JVM settings -Xms:256, -Xmx-1024 and one of the sub job has its JVM settings like -Xms:1024, -Xmx-4096.

Note: I am not using use independent process to run sub job

Now , my question is which settings will be considered while execution of sub job begins.

Re: How JVM settings between Main Job and Sub Job Works?

Jesperrekuh — Wed, 07 Mar 2018 23:08:36 GMT

Your job is packaged in a jar and executed using jvm setting of your main job... sub job ignored.

java has some additional tools which you can use to monitor your jvm. jconsole.exe

Look in your java /bin folder ... install jdk to have even more tools.

Re: How JVM settings between Main Job and Sub Job Works?

Anonymous — Thu, 08 Mar 2018 06:21:35 GMT

JVM is controlled by the parent job always ,So if main job will be having -Xms:256, -Xmx-1024 then the child will also be using same memory.

Re: How JVM settings between Main Job and Sub Job Works?

ashif2 — Sat, 10 Mar 2018 16:46:42 GMT

@rhall :: Can you confirm on this..

Re: How JVM settings between Main Job and Sub Job Works?

TRF — Sat, 10 Mar 2018 23:11:59 GMT

Hi,
If you don't use the "use independent process to run subjob", child job runs in the same JVM as the parent. In this case child inherits parents JVM parameters.
If you use the "use independent process to run subjob", a new JVM is started to run child job with it's own parameters (defined in Advanced settings).

Re: How JVM settings between Main Job and Sub Job Works?

Anonymous — Tue, 02 Apr 2019 15:23:25 GMT

how to verify that separate JVM started when we use the "use independent process to run subjob", a new JVM is started to run child job with it's own parameters (defined in Advanced settings).

Anyone can help me with this.