title: AWS Network load balancer - What is client reset count (and why is it high)
body: <p>The documentation for the various client/target/elb reset count metrics (<code>TCP_Client_Reset_Count</code>, <code>TCP_Target_Reset_Count</code>, <code>TCP_ELB_Reset_Count</code>) just says they count RST packets. I tried to understand what a RST packet is, and it seems to have to do with broken TCP connections. My load balancer has a single, long-term, seemingly successful client connection. Why do I see on the order of 100 client resets per hour? I also see about 10 load balancer resets per hour, and 0 target resets.</p>
  
  <p>EDIT: I just observed that increasing the size of the server instance (I'm using Farscape--increased 0.25 vCPU to 0.5) led to a 10-fold reduction in client resets per hour. The number of load balancer resets did not change.</p>