Total

cluster.external_app1_http.upstream_rq_total: 37988

2xx

cluster.external_app1_http.upstream_rq_200: 37981
cluster.external_app1_http.upstream_rq_2xx: 37981

5xx

cluster.external_app1_http.upstream_rq_503: 7303
cluster.external_app1_http.upstream_rq_5xx: 7303

Retries

cluster.external_app1_http.upstream_rq_retry: 0
cluster.external_app1_http.upstream_rq_retry_overflow: 0
cluster.external_app1_http.upstream_rq_retry_success: 0

There are around 7k 5xx and 0 retries.
So how come the 2xx count is pretty much same as rq_total ??

Shouldn't it be like rq_total - 5xx (i.e) 37k - 7k ~= 30k 2xx ?
How are those 7k 5xx not subtracted in 2xx

Full Stats Link

Additional Info:

I have a setup like this in k8s

   ( front proxy ) ->       [ Envoy Sidecar ]   ->    [   Envoy Sidecar   ]
                              [ Gateway]                [external_app_1]                          

Above is the log for Gateway Envoy Sidecar