# Configure Java Heap Space in 8.3

**URL:** <https://forum.inductiveautomation.com/t/configure-java-heap-space-in-8-3/111108>\
**Category:** Ignition\
**Tags:** ignition83\
**Created:** [September 30, 2025, 5:57pm UTC](https://forum.inductiveautomation.com/t/configure-java-heap-space-in-8-3/111108 "2025-09-30T17:57:59Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![gpellicelli](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/gpellicelli/32/53466_2.png) [@gpellicelli](https://forum.inductiveautomation.com/u/gpellicelli)\
**Post date:** [September 30, 2025, 5:57pm UTC](https://forum.inductiveautomation.com/t/configure-java-heap-space-in-8-3/111108/1 "2025-09-30T17:57:59Z")

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**Hello,**

Is there a way in Ignition 8.3 (like in 8.1) to configure the maximum and initial Java heap space allocated to the Gateway?

On my **Gateway System Performance** page, I can see that my Gateway is struggling, and I’d like to increase the maximum heap size to 4 GB. However, I wasn’t able to find where to configure this in the Gateway settings, the 8.3 documentation, or the `localhost:8088/openapi` resources.

Is there a specific place to configure this? I’m sure it must be obvious, but I’m probably just not looking in the right spot.

**Best regards,**  
Gabriel

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/f/6/f63bb5e833b36c5b59f6d371391b37a9517c7ba4.png)

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**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\
**Post date:** [September 30, 2025, 6:09pm UTC](https://forum.inductiveautomation.com/t/configure-java-heap-space-in-8-3/111108/2 "2025-09-30T18:09:12Z")

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It's exactly the same as it was in 8.1 - in the `ignition.conf` file at `$IGNITION/data/ignition.conf`.

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [September 30, 2025, 6:53pm UTC](https://forum.inductiveautomation.com/t/configure-java-heap-space-in-8-3/111108/3 "2025-09-30T18:53:04Z")

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In the docs:

> **[Gateway Configuration File Reference | Ignition User Manual](https://www.docs.inductiveautomation.com/docs/8.3/appendix/reference-pages/gateway-configuration-file-reference#gateway-memory-allocation)**
>
> This section details the various configuration changes that can be made to the Gateway's configuration file: ignition.conf. Before the Gateway starts, a wrapper service checks the configuration file for parameter values, and then attempts to start...