Said It Here

PHP fatal memory exhaustion errors after moving to in-house hosting

Moving a website to an in-house server can trigger recurring fatal memory exhaustion errors, often occurring around the same time every day when users attempt to log into the admin dashboard. This issue blocks normal site management and administration tasks, forcing administrators to constantly troubleshoot server logs and resource limits.

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

  1. 1
    rolling back PHP version
  2. 2
    turning off JIT
  3. 3
    bumping memory limits in wp-config.php
  4. 4
    turning off all plugins and turning them back on one at a time
  5. 5
    Making the template smaller
  6. 6
    Reducing the size resolution of the images
  7. 7
    Storing files as content document links or using custom merge fields referenced by IDs to reduce heap load

In their words

Unedited, most upvoted first, each linked to the thread it came from.

“Thanks a lot u/DaveTheNGVet . We are already testing your tool and so far good, but we are hitting one snag - we have word template with some images, altogether 10mb and we hit Apex heap size too large. Any suggestions how we can go around it (other than making the template smaller)?”source ↗

Dry-Recording-3726 · r/salesforce · 3 upvotes

“ever since moving to inhouse hosting on our own server we have been having this error pop up: [16-Sep-2026 14:23:20 UTC] PHP Fatal error: Allowed memory size of 4294967296 bytes exhausted (tried to allocate 4295229440 bytes) inwebsite\wp-includes\theme.php on line 189”source ↗

“I'm racking my brain between shoving error logs into copilot and trying to check databases and other logs as to why this happens around the same time everyday when someone tries to log into the admin dashboard.”source ↗

ianfgraphics · r/Wordpress · 2 upvotes

Where this came up

r/Wordpressr/salesforcedebugginghostingperformancesalesforce

People with this problem also raised