I have virtual BIG-IP running with 220.127.116.11 deployed in HA. Allocated memory is 16 GB, LTM, ASM & APM have been licensed and provisioned.
Noticed that Swap Memory utilization is almost 100%.
Verified with command "tmsh show /sys memory", noticed that almost all allocated Swap Memory is used.
Verified with command "free -m" and got the same result that almost all allocated Swap Memory is used.
However TMM memory utilization is normal.
Performed HA Failover, found that BIG-IP which took Active role because of HA Failover has high Swap Memory Utilization. Even the BIG-IP which was Active before HA Failover (now as passive) didn't release the memory for multiple weeks.
I restarted services on Passive BIG-IP and found swap memory utilization is low now.
Any input would be highly appreciated.
You should raise a support case with F5 Support - this might be a bug in v18.104.22.168. E-mail: firstname.lastname@example.org
I experienced the same issue with even 13.1.1.X as well.