Bug ID 635173: Standby BIG-IP TMM uses unexpectedly large amount of memory

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6

Fixed In:
14.1.0

Opened: Dec 20, 2016

Severity: 3-Major

Symptoms

TMM memory usage on a BIG-IP standby device might be substantially higher than an active device, and it recovers each time when the high availability (HA) connection is lost and re-established.

Impact

The standby device may not be able to take over traffic when failover happens.

Conditions

The problem happens only on Standby device with L7 mirroring traffic in effect.

Workaround

There is no workaround at this time.

Fix Information

The mirroring flag is now cleared for a connection on error so the potentially high memory use no longer occurs.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips