Show the number of dropped segments (#210)

Signed-off-by: bigsheeper <[email protected]>

states/etcd/show/segment.go

@@ -38,7 +38,7 @@ func (c *ComponentShow) SegmentCommand(ctx context.Context, p *SegmentParam) err
 	totalRC := int64(0)
 	healthy := 0
 	var statslogSize int64
-	var growing, sealed, flushed int
+	var growing, sealed, flushed, dropped int
 	fieldSize := make(map[int64]int64)
 	for _, info := range segments {
 
@@ -53,6 +53,8 @@ func (c *ComponentShow) SegmentCommand(ctx context.Context, p *SegmentParam) err
 			sealed++
 		case models.SegmentStateFlushing, models.SegmentStateFlushed:
 			flushed++
+		case models.SegmentStateDropped:
+			dropped++
 		}
 
 		switch p.Format {
@@ -87,7 +89,7 @@ func (c *ComponentShow) SegmentCommand(ctx context.Context, p *SegmentParam) err
 		fmt.Printf("--- Total statslog size: %s\n", hrSize(statslogSize))
 	}
 
-	fmt.Printf("--- Growing: %d, Sealed: %d, Flushed: %d\n", growing, sealed, flushed)
+	fmt.Printf("--- Growing: %d, Sealed: %d, Flushed: %d, Dropped: %d\n", growing, sealed, flushed, dropped)
 	fmt.Printf("--- Total Segments: %d, row count: %d\n", healthy, totalRC)
 	return nil
 }