From e996f6d44b270a66be2d4cbc6fb8b8bb2a03c6ba Mon Sep 17 00:00:00 2001
From: "blinkagent[bot]" <237617714+blinkagent[bot]@users.noreply.github.com>
Date: Thu, 16 Apr 2026 09:43:54 +0100
Subject: [PATCH] chore: increase coderd_chatd_message_count histogram max
 bucket to 1024 (#24409)

The `coderd_chatd_message_count` histogram's current max bucket of 128
is being hit in production. This increases the exponential bucket count
from 8 to 11, extending coverage from `1..128` to `1..1024`.

Before: `1, 2, 4, 8, 16, 32, 64, 128`
After: `1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024`

Co-authored-by: blink-so[bot] <211532188+blink-so[bot]@users.noreply.github.com>
---
 coderd/x/chatd/chatloop/metrics.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/coderd/x/chatd/chatloop/metrics.go b/coderd/x/chatd/chatloop/metrics.go
index c815c53544..95ed43ab76 100644
--- a/coderd/x/chatd/chatloop/metrics.go
+++ b/coderd/x/chatd/chatloop/metrics.go
@@ -50,7 +50,7 @@ func NewMetrics(reg prometheus.Registerer) *Metrics {
 			Subsystem: metricsSubsystem,
 			Name:      "message_count",
 			Help:      "Number of messages in the prompt per LLM request.",
-			Buckets:   prometheus.ExponentialBuckets(1, 2, 8), // 1, 2, 4, 8, 16, 32, 64, 128
+			Buckets:   prometheus.ExponentialBuckets(1, 2, 11), // 1, 2, 4, ..., 1024
 		}, []string{"provider"}),
 		PromptSizeBytes: factory.NewHistogramVec(prometheus.HistogramOpts{
 			Namespace: metricsNamespace,