Too many connections on load balancer server
My website sometimes has too many connections at once, let's say 20,000 connections at once. When it happens, nobody can access the site anymore.
So I decided to use lslb. I have 3 servers now, 1st is for lslb and 2nd and 3rd for the site.
However, when the load balancer gets 20,000 connecitons at once, the load balancer is also dead. In the stats, it shows
Req In processing: 20,000
Since the load balancer server is also dead, it can not redirect user to my site (server 2 and 3). It is just the same when I do not use lslb.
How do I fix this problem? How do I config the load balancer to send requests to my site (server2 and 3) even when the load balancer has 20,000 requests. How do I increase the Req/second to higher number. When it only process 80 requests/second, it will take hours to process all 20,000 connections.