"snmpd" daemon occasionally (every ~5 seconds) consumes CPU at very high level (spikes).
Example output from "top" command:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ P COMMAND
3072 admin 17 0 25788 10m 6572 S 90 0.1 17:17.01 1 snmpd
On Cluster, as a result of high CPU load, the CUL mechanism is triggered. Example from /var/log/messages file: FW-1: [cul_load_freeze][CUL - Cluster] Setting CUL FREEZE_ON, high kernel CPU usage (85%) on local Member 1, threshold = 80%
Output of "strace" utility attached to SNMPD daemon shows during the issue (during spike in CPU load) that SNMPD daemon is querying various interface information on the machine.