I am getting a lot of HTTP zero in the results, how can I troubleshoot it?

[fombico]

I am running vegeta v12.8.4 on a kubernetes pod, sending 5000 RPS for 60s with an JWT authorization header. The pod had 4 CPU and 8 GB of memory. I am seeing a success rate of 34%, where all the status codes are either 0 or 200.

I understand from the readme that HTTP 0 means a request failed to be sent. Does this mean:

• vegeta cannot send 5000 RPS?
• vegeta needs more CPU/memory?
• things are failing on at a TCP level?

I am trying to eliminate the variables and wondering if this 5000 RPS is too much load to send from Vegeta.

Thanks