Bug ID 1041985: TMM memory utilization increases after upgrade

Last Modified: Dec 07, 2023

Affected Product(s):
BIG-IP APM, Install/Upgrade(all modules)

Known Affected Versions:
15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,, 16.1.0, 16.1.1, 16.1.2,,, 16.1.3,,,,,, 17.0.0,,, 17.1.0,,,

Fixed In:
17.1.1, 16.1.4, 15.1.9

Opened: Aug 20, 2021

Severity: 3-Major


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.


TMM memory may increase while passing traffic.


-- 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


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

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips