Bug ID 545450: Log activation/deactivation of TM.TCPMemoryPressure

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 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, 11.5.10, 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, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4, 11.6.0 HF5, 11.6.0 HF6, 11.6.0 HF7, 11.6.0 HF8, 11.6.1, 11.6.1 HF1, 12.0.0, 12.0.0 HF1, 12.0.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2

Fixed In:
13.0.0, 12.1.2, 11.6.1 HF2, 11.5.4 HF3

Opened: Sep 11, 2015
Severity: 3-Major

Symptoms

The TCP memory pressure feature allows packets to be randomly dropped when the TMM is running low on available memory. The issue is that these packets are dropped silently.

Impact

Packets are dropped, where the cause of the drop cannot be easily determined.

Conditions

TM.TCPMemoryPressure set to "enable".

Workaround

None

Fix Information

Logging added in /var/log/ltm for activation and deactivation of TCP memory pressure. The deactivation message also includes the number of packets and bytes dropped.

Behavior Change