storage/backend: Add a gauge to indicate if defrag is active (backport from 3.6)

2021-10-06 11:01:07 -07:00
parent 1eac258f58
commit 85abf6e46d
2 changed files with 10 additions and 0 deletions
--- a/mvcc/backend/backend.go
+++ b/mvcc/backend/backend.go
@ -354,6 +354,8 @@ func (b *backend) Defrag() error {

 func (b *backend) defrag() error {
 	now := time.Now()
+	isDefragActive.Set(1)
+	defer isDefragActive.Set(0)

 	// TODO: make this non-blocking?
 	// lock batchTx to ensure nobody is using previous tx, and then