Bug ID 453171: High CPU usage leading to tmm/apd cores/restart

Last Modified: Jul 18, 2026

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

Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11

Fixed In:
11.6.0, 11.5.2

Opened: Mar 19, 2014

Severity: 3-Major

Related Article: K16005

Symptoms

High CPU usage leading to tmm/apd cores under certain conditions.

Impact

Traffic disrupted while tmm restarts.

Conditions

This might occur with a large number of cookies when using Application Policy Manager (APM).

Workaround

Reduce cookie data sent.

Fix Information

The system now correctly handles a large number of cookies when using Application Policy Manager (APM).

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips