Bug ID 459884: Large POST requests are not handled well by APM.

Last Modified: Sep 13, 2023

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:
11.3.0, 11.5.1, 11.5.2

Fixed In:
11.6.0, 11.5.3

Opened: Apr 30, 2014

Severity: 4-Minor


Large (4 MB or more) POST requests cause APM to crash if the request is retried. (The default limit is 64 KB, but can be increased in the configuration.)


The TMM may core. The TMM lacks the required contiguous block of memory due to fragmentation.


An unusually large POST limit in APM. A big POST that needs to be retried.


Make sure POST limit is 4 MB or lower.

Fix Information

APM no longer cores when configured to accept large POST requests, and the POST cannot be buffered.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips