Bug ID 618382: qkview may cause tmm to restart or may take 30 or more minutes to run

Last Modified: Apr 10, 2019

Bug Tracker

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

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1

Fixed In:
13.0.0, 12.1.2, 12.1.1 HF2

Opened: Sep 22, 2016
Severity: 2-Critical
Related AskF5 Article:
K21095198

Symptoms

When taking a qkview on a heavily loaded BIG-IP device (with lots of connections) running 12.1.0 or 12.1.1, the qkview utility may take a very long time to complete (30+ minutes) or cause tmm to restart. This is due to a new qkview command that was added to gather a list of recent connections with the tmsh show sys connection command, which has a significant performance impact when run while the BIG-IP is heavily loaded.

Impact

Qkview command can take an exceedingly long time to run (30+ minutes). Traffic disrupted while tmm restarts.

Conditions

This can occur on the following versions: - 12.1.0 including 12.1.0 HF1 and 12.1.0 HF2 - 12.1.1 including 12.1.1 HF1 This can occur when the BIG-IP is heavily loaded and while running the qkview command.

Workaround

Do not run the qkview command if the device is heavily loaded.

Fix Information

Removed offending "show sys connection" command from qkview utility.

Behavior Change