Bug ID 441401: Standby units using L4 mirroring can use more memory than required

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.4.1, 11.5.0

Fixed In:
11.5.1, 11.5.0 HF1, 11.4.1 HF4

Opened: Dec 20, 2013
Severity: 3-Major
Related AskF5 Article:


On standby units using Layer 4 (L4) mirroring, some memory is retained longer than necessary leading to higher memory usage on the standby.


Higher memory usage on the standby, leading to earlier aggressive sweeper activation than on the active.


A standby unit using L4 mirroring.



Fix Information

Released memory earlier on standby units using L4 mirroring, Some memory was retained longer than necessary

Behavior Change