Bug ID 1041985: TMM memory utilization increases after upgrade

Last Modified: Jan 20, 2023

Bug Tracker

Affected Product:  See more info
BIG-IP APM, Install/Upgrade(all modules)

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3

Opened: Aug 20, 2021
Severity: 4-Minor

Symptoms

TMM memory utilization increases after upgrading. The keep-alive interval of the _tmm_apm_portal_tcp default profile is set to a value that is less than the Idle Timeout setting.

Impact

TMM memory may increase while passing traffic.

Conditions

-- APM enabled and passing traffic -- The configuration has a profile that uses or is derived from _tmm_apm_portal_tcp where the keep-alive interval was reduced to 60 Note that this can be encountered any time a tcp profile contains a keep-alive interval setting that is less than the idle timeout. For more information about the relationship between keep-alive and idle time out, see K13004262: Understanding Idle Timeout and Keep Alive Interval settings in the TCP profile, available at https://support.f5.com/csp/article/K13004262

Workaround

Change the tcp keep alive interval to the default setting of 1800 seconds.

Fix Information

None

Behavior Change