Bug ID 470690: PEM: CPU will spikes up if Gx enabled and sessions are being deleted.

Last Modified: Aug 19, 2026

Affected Product(s):
BIG-IP PEM(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, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10

Fixed In:
11.6.0

Opened: Jul 08, 2014

Severity: 2-Critical

Symptoms

If Gx is enabled, then once the sessions are marked for deleted, CPU will spike up

Impact

High CPU usage.

Conditions

Gx enabled and sessions being deleted/replaced.

Workaround

None

Fix Information

Session cleaning priority has been lowered and CPU will not spike when sessions are deleted or replaced with Gx enabled.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips