Bug ID 1006449: The default size of the subagent object cache possibly leading to slow snmp response time

Last Modified: Jan 20, 2023

Bug Tracker

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

Known Affected Versions:
15.1.0,,,,,, 15.1.1, 15.1.2,, 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,,,

Opened: Mar 25, 2021
Severity: 4-Minor


After upgrading from a 13.1.x release to a later release (such as 15.1.x), BIG-IP CPU utilization increases and SNMP is slow to respond.


SNMP queries take an unusually long time to return data, and BIG-IP CPU utilization is higher.


SNMP client repeatedly polls BIG-IP for OIDs in multiple tables over a short period of time.


To the file /config/snmp/bigipTrafficMgmt.conf, add one line with the following content: cacheObj 16 This could be accomplished by executing the following command line from bash: # echo "cacheObj 16" >> /config/snmp/bigipTrafficMgmt.conf After the above config file has been modified and saved, the "snmpd" daemon must be restarted, using one of two command variants: (on a BIG-IP appliance or VE system) # bigstart restart snmpd (on a a multi-slot VIPRION or vCMP guest) # clsh bigstart restart snmpd (However, this adjustment will be lost when the BIG-IP software is next upgraded.)

Fix Information


Behavior Change