I've a SharePoint 2013 farm with 1 FE 1 AP and 1 DB server. IIS worker proces on FE server costs high CPU sometimes and so I added a new FE server to my farm and now I've 2 FE 1 AP and 1 DB server on my farm and using F5 load balancer.
But there is an issue about load balancing. Users can reach SharePoint2013 web application just normal. But sometimes some users are getting 500 error and they aren't reaching web application. I guess it is because of high CPU costs on one server, again I guess F5 should redirect users to other server which has short response time. Page refresh can't solve the problem. But when I stop IIS on a server they can reach the web application. Is there an issue about F5 load balancing? What are F5 best practices on SharePoint 2013 load balancing?
P.S.: I am using least connection method on F5. FE servers have same configuration.