Merge pull request #11834 from influxdata/bj-tag-cache-string

Convert TagValueSeriesIDCache to use string fields

tsdb/tsi1/cache.go

@@ -112,9 +112,9 @@ func (c *TagValueSeriesIDCache) Put(name, key, value []byte, ss *tsdb.SeriesIDSe
 
 	// Create list item, and add to the front of the eviction list.
 	listElement := c.evictor.PushFront(&seriesIDCacheElement{
-		name:        name,
-		key:         key,
-		value:       value,
+		name:        string(name),
+		key:         string(key),
+		value:       string(value),
 		SeriesIDSet: ss,
 	})
 
@@ -214,9 +214,9 @@ func (c *TagValueSeriesIDCache) PrometheusCollectors() []prometheus.Collector {
 
 // seriesIDCacheElement is an item stored within a cache.
 type seriesIDCacheElement struct {
-	name        []byte
-	key         []byte
-	value       []byte
+	name        string
+	key         string
+	value       string
 	SeriesIDSet *tsdb.SeriesIDSet
 }