Error generating event cache, error code 524

[Arcanum417]

When generating cache .json for one of my missions it stops before full mission run time and gives error 524. The data generated is ok but the last hour or so of mission is missing (events in database look ok I could provide export or access on request).
.json is always 139 458 KB and it takes the same time so I susspected a timeout. I set max_execution_time = 1000 in php .ini

https://missionreport.417rct.org/2/price-of-independence
https://missionreport.417rct.org/cache/events/2.json

[Arcanum417]

This really looks like just a overload of data to process in some kind of arbitrary timeout. Just point me to some other php timeout configuration and this could work.