Last Modified: Jan 07, 2026
Affected Product(s):
BIG-IP APM
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, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5
Fixed In:
12.0.0, 11.6.0 HF6, 11.5.1 HF6
Opened: Sep 29, 2014 Severity: 3-Major
Customers running into isession related issues.
TMM could run out of memory because of these issues.
This happens when APM has been running.
This issue has no workaround at this time.
If customer does not need optimized tunnels, app tunnels, remote desktop then he can safely disable the db variable "isession.ctrl.apm" which disables isession. Then do "bigstart restart tmm apd" so that the db variable takes effect.