diff --git a/sessionctx/variable/sysvar.go b/sessionctx/variable/sysvar.go
index 6a337f98a604a..6bafe04d33a46 100644
--- a/sessionctx/variable/sysvar.go
+++ b/sessionctx/variable/sysvar.go
@@ -1675,8 +1675,8 @@ var defaultSysVars = []*SysVar{
 
 	/* tikv gc metrics */
 	{Scope: ScopeGlobal, Name: TiDBGCEnable, Value: On, Type: TypeBool},
-	{Scope: ScopeGlobal, Name: TiDBGCRunInterval, Value: "10m0s", Type: TypeDuration, MinValue: int64(time.Minute * 10), MaxValue: math.MaxInt64},
-	{Scope: ScopeGlobal, Name: TiDBGCLifetime, Value: "10m0s", Type: TypeDuration, MinValue: int64(time.Minute * 10), MaxValue: math.MaxInt64},
+	{Scope: ScopeGlobal, Name: TiDBGCRunInterval, Value: "10m0s", Type: TypeDuration, MinValue: int64(time.Minute * 10), MaxValue: uint64(time.Hour * 24 * 365)},
+	{Scope: ScopeGlobal, Name: TiDBGCLifetime, Value: "10m0s", Type: TypeDuration, MinValue: int64(time.Minute * 10), MaxValue: uint64(time.Hour * 24 * 365)},
 	{Scope: ScopeGlobal, Name: TiDBGCConcurrency, Value: "-1", Type: TypeInt, MinValue: 1, MaxValue: 128, AllowAutoValue: true},
 	{Scope: ScopeGlobal, Name: TiDBGCScanLockMode, Value: "PHYSICAL", Type: TypeEnum, PossibleValues: []string{"PHYSICAL", "LEGACY"}},
 	{Scope: ScopeGlobal, Name: TiDBGCScanLockMode, Value: "LEGACY", Type: TypeEnum, PossibleValues: []string{"PHYSICAL", "LEGACY"}},