From 2bdf2152dd5ddba5248dfe54431c8fd3fa4b81da Mon Sep 17 00:00:00 2001
From: Suyash <dextrous93@gmail.com>
Date: Sat, 6 Aug 2016 17:16:39 +0530
Subject: [PATCH] registry: track instance name lengths

---
 registry.go | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/registry.go b/registry.go
index 1400e86..85b42b9 100644
--- a/registry.go
+++ b/registry.go
@@ -108,7 +108,7 @@ func (r *PCPRegistry) ValuesCount() int { return r.valueCount }
 // StringCount returns the number of strings in the registry
 func (r *PCPRegistry) StringCount() int {
 	if r.version2 {
-		return r.stringcount + r.MetricCount()
+		return r.stringcount + r.MetricCount() + r.InstanceCount()
 	}
 
 	return r.stringcount
@@ -148,6 +148,14 @@ func (r *PCPRegistry) AddInstanceDomain(indom InstanceDomain) error {
 	r.instanceDomains[indom.Name()] = indom.(*PCPInstanceDomain)
 	r.instanceCount += indom.InstanceCount()
 
+	if !r.version2 {
+		for _, v := range indom.Instances() {
+			if len(v) > MaxV1MetricNameLength {
+				r.version2 = true
+			}
+		}
+	}
+
 	log.WithFields(logrus.Fields{
 		"prefix":        "registry",
 		"name":          indom.Name(),