Bug ID 697988: During config sync, if many client-ssl profiles are on a virtual server the CPU may briefly spike to 100%

Last Modified: Feb 23, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2, 12.1.2 HF1, 12.1.2 HF2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1, 14.0.0,,,,,, 14.0.1,

Fixed In:

Opened: Dec 07, 2017

Severity: 4-Minor

Related Article: K34554754


During config sync, if many (hundreds) of client-ssl profiles are attached to a virtual server, the CPU may spike to 100%.


If enough client-ssl profiles are attached, the watchdog could fire, crashing tmm and causing service disruption. Traffic disrupted while tmm restarts.


-- Many (hundreds) of client-ssl profiles are attached to a virtual server. -- Config sync is executed.


There is no workaround other than not attaching hundreds of client-ssl profiles to a virtual server, or disabling config sync.

Fix Information

Issue no longer occurs when there are 2000+ client-ssl profiles attached to a virtual server and config sync is executed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips