Files
pezkuwi-subxt/prdoc
Niklas Adolfsson efcea0edab rpc server: add prometheus label is_rate_limited (#3504)
After some discussion with @kogeler after the we added the rate-limit
middleware it may slow down
the rpc call timings metrics significantly because it works as follows:

1. The rate limit guard is checked when the call comes and if a slot is
available -> process the call
2. If no free spot is available then the call will be sleeping
`jitter_delay + min_time_rate_guard` then woken up and checked at most
ten times
3. If no spot is available after 10 iterations -> the call is rejected
(this may take tens of seconds)

Thus, this PR adds a label "is_rate_limited" to filter those out on the
metrics "substrate_rpc_calls_time" and "substrate_rpc_calls_finished".

I had to merge two middleware layers Metrics and RateLimit to avoid
shared state in a hacky way.

---------

Co-authored-by: James Wilson <james@jsdw.me>
2024-03-05 09:50:57 +00:00
..
2023-12-12 14:29:56 +00:00
2023-12-12 18:51:54 +02:00
2023-09-06 11:25:47 +03:00
2023-12-04 14:25:57 +00:00
2024-02-23 14:09:49 +00:00