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An1-3
Level 4
Nov 4, 2022 12:38 PM UTC
Solved

Minimum Heap Size Allocation for Ecommerce application

Hello Team, We are facing heap memory issue for our application . Would like to check what should Minimum Heap Size Allocation for Ecommerce application in ideal scenario ?  we know it depends upon user, traffic etc. 

Looking for recommendations ...

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Saravanan_Dharmaraj
Saravanan_DharmarajAccepted solution
New Participant
Nov 4, 2022 2:31 PM UTC

I feel it depends on your AEM set up too. Below documentation from the Adobe gives an idea on the performance based on the set up you might have

 

https://experienceleague.adobe.com/docs/experience-manager-64/deploying/configuring/performance-guidelines.html?lang=en

 

Also in the same post https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/aem-author-heap-size-error/td-p/400184 given by @jagadeesh_prakash 

please check the reply from @Jorg_Hoh reply on memory issue

 

To understand the root cause for slowness, I would use the following approach:

* enable Garbage Collection logging on the JVM and monitor the GC behavior.

* quantify "slowness": Determine "slow" requests and make it actionable (what makes a slow request "slow"? Response times over 1 second?)

* check the periodic threaddump and search for patterns; correlate it with observed slowness (slow requests). It's definitely best if you could reproduce this in a lower environment and attach a profile to it to understand where the time is spend.

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3 replies

joerghoh
joerghoh
Employee
Nov 4, 2022 7:35 PM UTC

It depends mostly on our ecommerce application itself, and what else this AEM instance is supposed to do. Why don't you start with 4G of heap (-Xmx4G, -Xms4G) and then start with performance testing? 

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    Saravanan_Dharmaraj
    Saravanan_DharmarajAccepted solution
    New Participant
    Nov 4, 2022 2:31 PM UTC

    I feel it depends on your AEM set up too. Below documentation from the Adobe gives an idea on the performance based on the set up you might have

     

    https://experienceleague.adobe.com/docs/experience-manager-64/deploying/configuring/performance-guidelines.html?lang=en

     

    Also in the same post https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/aem-author-heap-size-error/td-p/400184 given by @jagadeesh_prakash 

    please check the reply from @Jorg_Hoh reply on memory issue

     

    To understand the root cause for slowness, I would use the following approach:

    * enable Garbage Collection logging on the JVM and monitor the GC behavior.

    * quantify "slowness": Determine "slow" requests and make it actionable (what makes a slow request "slow"? Response times over 1 second?)

    * check the periodic threaddump and search for patterns; correlate it with observed slowness (slow requests). It's definitely best if you could reproduce this in a lower environment and attach a profile to it to understand where the time is spend.

    Translate
      Jagadeesh_Prakash
      Jagadeesh_Prakash
      New Participant
      Nov 4, 2022 1:26 PM UTC

      @an1-3 Hope this is useful

       

      AEM instances were running with a minimum heap size of 256M, a maximum heap size of 1024M.

       

      https://experienceleague.adobe.com/docs/experience-manager-64/managing/managing-further-reference/hardware-sizing-guidelines.html?lang=en

       

      Below link and answer from @kiran_vedantam  will be helpful 

      https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/aem-author-heap-size-error/td-p/400184

       

       

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