Bug ID 864677: ASM causing high mcpd CPU usage due to constant gtm_vs_score updates.

Last Modified: Jan 20, 2020

Bug Tracker

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

Known Affected Versions:
14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 14.1.2.2, 14.1.2.3, 15.0.0, 15.0.1, 15.0.1.1, 15.1.0

Opened: Dec 23, 2019
Severity: 3-Major

Symptoms

CPU utilization is high on the odd-numbered cores.

Impact

Updating virtual server GTM scores every 60s is elevating CPU usage by mcpd

Conditions

-- One or move Virtual Servers have FTP/SMTP/WEBSEC profiles attached to it -- ASM configured

Workaround

1) On the BIG-IP, edit the file /etc/ts/tools/nwd.cfg change the value EnforcerCpuReportTimeInterval from 60 to a higher value like 3600 for once an hour or even larger. 2) bigstart restart asm

Fix Information

None

Behavior Change