Remove _total from prometheus_tsdb_storage_blocks_bytes (#506)

Signed-off-by: Brian Brazil <brian.brazil@robustperception.io>

CHANGELOG.md

@@ -1,5 +1,7 @@
 ## master / unreleased
 
+ - [CHANGE] `prometheus_tsdb_storage_blocks_bytes_total` is now `prometheus_tsdb_storage_blocks_bytes`
+
 ## 0.4.0
  - [CHANGE] New `WALSegmentSize` option to override the `DefaultOptions.WALSegmentSize`. Added to allow using smaller wal files. For example using tmpfs on a RPI to minimise the SD card wear out from the constant WAL writes. As part of this change the `DefaultOptions.WALSegmentSize` constant was also exposed.
  - [CHANGE] Empty blocks are not written during compaction [#374](https://github.com/prometheus/tsdb/pull/374)
@@ -10,6 +12,7 @@
  - [REMOVED] `PrefixMatcher` is considered unused so was removed.
  - [CLEANUP] `Options.WALFlushInterval` is removed as it wasn't used anywhere.
  - [FEATURE] Add new `LiveReader` to WAL pacakge. Added to allow live tailing of a WAL segment, used by Prometheus Remote Write after refactor. The main difference between the new reader and the existing `Reader` is that for `LiveReader` a call to `Next()` that returns false does not mean that there will never be more data to read.
+ - [CHANGE] Empty blocks are not written during compaction [#374](https://github.com/prometheus/tsdb/pull/374)
 
 ## 0.3.1
  - [BUGFIX] Fixed most windows test and some actual bugs for unclosed file readers.

db.go

@@ -202,7 +202,7 @@ func newDBMetrics(db *DB, r prometheus.Registerer) *dbMetrics {
 		Help: "The time taken to recompact blocks to remove tombstones.",
 	})
 	m.blocksBytes = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "prometheus_tsdb_storage_blocks_bytes_total",
+		Name: "prometheus_tsdb_storage_blocks_bytes",
 		Help: "The number of bytes that are currently used for local storage by all blocks.",
 	})
 	m.sizeRetentionCount = prometheus.NewCounter(prometheus.CounterOpts{