Forum Discussion
dhubick
Altocumulus
AltocumulusHigh Server CPU after 16.2.1 Upgrade
Our SysAdmin team has reported a sharp increase in CPU usage on the nodes in our ltm pools after upgrading to BIG-IP 16.2.1. from 14.2.1. The servers are maintained by a different team, but I ...
Nikoolayy1
MVP
MVPBetter check from the servers whuch process causes the issue not on the F5. The issue could be that F5 now uses more complex SSL ciphers or something needs to be changed in the server side TCP profile on the F5 device to optimize the traffic.
https://support.f5.com/csp/article/K50411377
https://support.f5.com/csp/article/K72605755
Still check the F5 LTM logs for some new errors with the VIP/nodes/pools/poolmembers and also see the f5 interfaces for some errors just in case.
dhubickAltocumulus
AltocumulusBest I can tell, it was using "ECDHE-RSA-AES128-GCM-SHA256" before and after upgrade.
Thanks for the leads though. Still checking into TCP profiles.