As a reminder
* This counters are for data with high-cardinality
* We have strong upper bound for memory limits
* They can be accessed from /top monitoring interface
Example:
```
curl 172.20.0.10:11111/top
since ~ 2022-08-09T07:45:58Z
auth_request_count project=9094cff8-104e-4956-a367-97ea134b7e06 11.000000
auth_request_buckets 1.000000
auth_request_discarded 0.000000
auth_request_count partner=00000000-0000-0000-0000-000000000000 11.000000
auth_request_buckets 1.000000
auth_request_discarded 0.000000
```
Note: discarded 0 --> we didn't hit the memory limit.
Change-Id: I8db09b4aa61bade55cb324b84b7fbcb8f068c179
f507de67f9