From 9a3020d2ce038d61ae2b180a6ab698cf2232cb87 Mon Sep 17 00:00:00 2001
From: Conrad Ludgate <conrad@neon.tech>
Date: Thu, 13 Mar 2025 20:23:53 +0000
Subject: [PATCH] chore(proxy): pre-initialise metricvecs (#11226)

## Problem

We noticed that error metrics didn't show for some services with light
load. This is not great and can cause problems for dashboards/alerts

## Summary of changes

Pre-initialise some metricvecs.
---
 proxy/src/metrics.rs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/proxy/src/metrics.rs b/proxy/src/metrics.rs
index 29834760c0..e5fc0b724b 100644
--- a/proxy/src/metrics.rs
+++ b/proxy/src/metrics.rs
@@ -30,7 +30,16 @@ pub struct Metrics {
 static SELF: OnceLock<Metrics> = OnceLock::new();
 impl Metrics {
     pub fn install(thread_pool: Arc<ThreadPoolMetrics>) {
-        SELF.set(Metrics::new(thread_pool))
+        let mut metrics = Metrics::new(thread_pool);
+
+        metrics.proxy.errors_total.init_all_dense();
+        metrics.proxy.redis_errors_total.init_all_dense();
+        metrics.proxy.redis_events_count.init_all_dense();
+        metrics.proxy.retries_metric.init_all_dense();
+        metrics.proxy.invalid_endpoints_total.init_all_dense();
+        metrics.proxy.connection_failures_total.init_all_dense();
+
+        SELF.set(metrics)
             .ok()
             .expect("proxy metrics must not be installed more than once");
     }