# Rate limit¶

Note

Local rate limiting is also supported via the local rate limit filter.

## Statistics¶

Every configured rate limit filter has statistics rooted at ratelimit.<stat_prefix>. with the following statistics:

Name

Type

Description

total

Counter

Total requests to the rate limit service

error

Counter

Total errors contacting the rate limit service

over_limit

Counter

Total over limit responses from the rate limit service

ok

Counter

Total under limit responses from the rate limit service

cx_closed

Counter

Total connections closed due to an over limit response from the rate limit service

active

Gauge

Total active requests to the rate limit service

failure_mode_allowed

Counter

Total requests that were error(s) but were allowed through because of failure_mode_deny set to false.

## Runtime¶

The network rate limit filter supports the following runtime settings:

ratelimit.tcp_filter_enabled

% of connections that will call the rate limit service. Defaults to 100.

ratelimit.tcp_filter_enforcing

% of connections that will call the rate limit service and enforce the decision. Defaults to 100. This can be used to test what would happen before fully enforcing the outcome.