From 7e369b9318a4d5d97a004586a99f10fa51a46b26 Mon Sep 17 00:00:00 2001
From: Mitsuhiro Tanda <mitsuhiro.tanda@gmail.com>
Date: Wed, 28 Dec 2016 03:34:07 +0900
Subject: [PATCH] expose max memory chunks metrics (#2303)

* expose max memory chunks metrics
---
 storage/local/storage.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/storage/local/storage.go b/storage/local/storage.go
index 8c9f54a4c..17f3e9d28 100644
--- a/storage/local/storage.go
+++ b/storage/local/storage.go
@@ -87,6 +87,11 @@ var (
 		"The maximum number of chunks that can be waiting for persistence before sample ingestion will stop.",
 		nil, nil,
 	)
+	maxMemChunksDesc = prometheus.NewDesc(
+		prometheus.BuildFQName(namespace, subsystem, "max_memory_chunks"),
+		"The configured maximum number of chunks that can be held in memory",
+		nil, nil,
+	)
 )
 
 type quarantineRequest struct {
@@ -1763,6 +1768,11 @@ func (s *MemorySeriesStorage) Collect(ch chan<- prometheus.Metric) {
 	ch <- s.ingestedSamplesCount
 	s.discardedSamplesCount.Collect(ch)
 	ch <- s.nonExistentSeriesMatchesCount
+	ch <- prometheus.MustNewConstMetric(
+		maxMemChunksDesc,
+		prometheus.GaugeValue,
+		float64(s.maxMemoryChunks),
+	)
 	ch <- prometheus.MustNewConstMetric(
 		chunk.NumMemChunksDesc,
 		prometheus.GaugeValue,