# \[Bug?\] Max heap 10240 and upgrade ignition 8.1

**URL:** <https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [August 21, 2025, 6:23pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061 "2025-08-21T18:23:25Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [August 21, 2025, 6:23pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/1 "2025-08-21T18:23:25Z")

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I have 2 server with Ifntion 8.1.48 and max heap memory set to 10240 Mo

After upgrading to 8.1.49, memory is changed to 2048.

Same issue when upgraded from 8.1.47 to 8.1.48

I suspect the check of ignition.conf take 10240 for 1024 and reset to the default value 2048

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<div class="post-metadata">

**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:** [August 22, 2025, 12:44pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/2 "2025-08-22T12:44:09Z")

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Can you share the before and after `ignition.conf` files from your gateway?

I don't see any upgrade logic for any versions that targets the memory settings, so something else must be going on.

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<div class="post-metadata">

**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [August 22, 2025, 12:48pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/3 "2025-08-22T12:48:17Z")

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yes I’ve sent it by PM

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<div class="post-metadata">

**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:** [August 22, 2025, 1:01pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/4 "2025-08-22T13:01:39Z")

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That's the "before" file?

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<div class="post-metadata">

**Author:** ![mazeyrat](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/mazeyrat/32/10955_2.png) [@mazeyrat](https://forum.inductiveautomation.com/u/mazeyrat)\
**Post date:** [August 22, 2025, 1:09pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/5 "2025-08-22T13:09:31Z")

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That’s the file after the upgrade.

I only reset the value 2048 to 10240

```python
Maximum Java Heap Size (in MB)

wrapper.java.maxmemory=10240

```

#

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<div class="post-metadata">

**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:** [August 22, 2025, 1:14pm UTC](https://forum.inductiveautomation.com/t/bug-max-heap-10240-and-upgrade-ignition-8-1/110061/6 "2025-08-22T13:14:27Z")

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Can you provide the "before" file? From a backup taken before the upgrade or something?