database/sql: provide stats on number of open connections to the database.
This change provides a convenient way to monitor database connection pool.
Change-Id: I4b3757855b43f3b254acf9312e2a16e2f87840d0
Reviewed-on: https://go-review.googlesource.com/7950
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/database/sql/sql_test.go b/src/database/sql/sql_test.go
index 60bdefa..e225ffe 100644
--- a/src/database/sql/sql_test.go
+++ b/src/database/sql/sql_test.go
@@ -1093,6 +1093,26 @@
}
}
+func TestStats(t *testing.T) {
+ db := newTestDB(t, "people")
+ stats := db.Stats()
+ if got := stats.OpenConnections; got != 1 {
+ t.Errorf("stats.OpenConnections = %d; want 1", got)
+ }
+
+ tx, err := db.Begin()
+ if err != nil {
+ t.Fatal(err)
+ }
+ tx.Commit()
+
+ closeDB(t, db)
+ stats = db.Stats()
+ if got := stats.OpenConnections; got != 0 {
+ t.Errorf("stats.OpenConnections = %d; want 0", got)
+ }
+}
+
// golang.org/issue/5323
func TestStmtCloseDeps(t *testing.T) {
if testing.Short() {
