Conrad Ludgate effd6bf829 [proxy] add metrics for caches (#12752) ...

Exposes metrics for caches. LKB-2594

This exposes a high level namespace, `cache`, that all cache metrics can
be added to - this makes it easier to make library panels for the caches
as I understand it.

To calculate the current cache fill ratio, you could use the following
query:

```
(
    cache_inserted_total{cache="node_info"}
  - sum (cache_evicted_total{cache="node_info"}) without (cause)
)
  / cache_capacity{cache="node_info"}
```

To calculate the cache hit ratio, you could use the following query:

```
  cache_request_total{cache="node_info", outcome="hit"}
/ sum (cache_request_total{cache="node_info"}) without (outcome)
```

2025-07-28 10:41:49 +00:00

..

local_proxy.rs

proxy: Define service_info metric showing the run state (#12749)

2025-07-25 18:27:21 +00:00

mod.rs

proxy: Move binaries into the lib (#10758)

2025-02-11 19:46:23 +00:00

pg_sni_router.rs

proxy: Define service_info metric showing the run state (#12749)

2025-07-25 18:27:21 +00:00

proxy.rs

[proxy] add metrics for caches (#12752)

2025-07-28 10:41:49 +00:00