diff --git a/br/pkg/lightning/checkpoints/checkpoints.go b/br/pkg/lightning/checkpoints/checkpoints.go
index 65ea720a1f455..76d7a9aa84353 100644
--- a/br/pkg/lightning/checkpoints/checkpoints.go
+++ b/br/pkg/lightning/checkpoints/checkpoints.go
@@ -1650,7 +1650,7 @@ func (cpdb *MySQLCheckpointsDB) DestroyErrorCheckpoint(ctx context.Context, tabl
 			DELETE FROM %[1]s.%[2]s WHERE table_name IN (SELECT table_name FROM %[1]s.%[3]s WHERE status <= ?)
 		`, cpdb.schema, CheckpointTableNameEngine, CheckpointTableNameTable)
 		deleteTableQuery = common.SprintfWithIdentifiers(`
-			DELETE FROM %s.%s status <= ?
+			DELETE FROM %s.%s WHERE status <= ?
 		`, cpdb.schema, CheckpointTableNameTable)
 		args = []any{CheckpointStatusMaxInvalid}
 	} else {
diff --git a/br/pkg/lightning/config/BUILD.bazel b/br/pkg/lightning/config/BUILD.bazel
index 9c54f5609fc93..1ae65a73dfd5e 100644
--- a/br/pkg/lightning/config/BUILD.bazel
+++ b/br/pkg/lightning/config/BUILD.bazel
@@ -42,7 +42,7 @@ go_test(
     ],
     embed = [":config"],
     flaky = True,
-    shard_count = 47,
+    shard_count = 48,
     deps = [
         "//br/pkg/lightning/common",
         "@com_github_burntsushi_toml//:toml",
diff --git a/br/pkg/lightning/config/config.go b/br/pkg/lightning/config/config.go
index b3bbd66fa33af..28c15d93d7b6d 100644
--- a/br/pkg/lightning/config/config.go
+++ b/br/pkg/lightning/config/config.go
@@ -100,6 +100,7 @@ const (
 
 	DefaultEngineMemCacheSize      = 512 * units.MiB
 	DefaultLocalWriterMemCacheSize = 128 * units.MiB
+	DefaultBlockSize               = 16 * units.KiB
 
 	defaultCSVDataCharacterSet       = "binary"
 	defaultCSVDataInvalidCharReplace = utf8.RuneError
@@ -1115,6 +1116,9 @@ func (t *TikvImporter) adjust() error {
 		if t.LocalWriterMemCacheSize == 0 {
 			t.LocalWriterMemCacheSize = DefaultLocalWriterMemCacheSize
 		}
+		if t.BlockSize == 0 {
+			t.BlockSize = DefaultBlockSize
+		}
 
 		if t.ParallelImport && t.AddIndexBySQL {
 			return common.ErrInvalidConfig.
diff --git a/br/pkg/lightning/config/config_test.go b/br/pkg/lightning/config/config_test.go
index 1a1386ff75849..e88c069b6c0c8 100644
--- a/br/pkg/lightning/config/config_test.go
+++ b/br/pkg/lightning/config/config_test.go
@@ -1299,3 +1299,16 @@ func TestAdjustConflict(t *testing.T) {
 	cfg.Conflict.MaxRecordRows = 1
 	require.ErrorContains(t, cfg.Conflict.adjust(&cfg.TikvImporter, &cfg.App), `cannot record duplication (conflict.max-record-rows > 0) when use tikv-importer.backend = "tidb" and conflict.strategy = "replace"`)
 }
+
+func TestAdjustBlockSize(t *testing.T) {
+	cfg := NewConfig()
+	cfg.TikvImporter.Backend = BackendLocal
+	cfg.TikvImporter.SortedKVDir = "."
+	cfg.TiDB.DistSQLScanConcurrency = 1
+	cfg.Mydumper.SourceDir = "."
+	cfg.TikvImporter.BlockSize = 0
+
+	err := cfg.Adjust(context.Background())
+	require.Error(t, err)
+	require.Equal(t, ByteSize(16384), cfg.TikvImporter.BlockSize)
+}
diff --git a/pkg/executor/importer/import.go b/pkg/executor/importer/import.go
index 0700d9932531e..b4e04bfe4dd2c 100644
--- a/pkg/executor/importer/import.go
+++ b/pkg/executor/importer/import.go
@@ -1331,6 +1331,7 @@ func (e *LoadDataController) getLocalBackendCfg(pdAddr, dataDir string) local.Ba
 		KeyspaceName:                tidb.GetGlobalKeyspaceName(),
 		PausePDSchedulerScope:       config.PausePDSchedulerScopeTable,
 		DisableAutomaticCompactions: true,
+		BlockSize:                   config.DefaultBlockSize,
 	}
 	if e.IsRaftKV2 {
 		backendConfig.RaftKV2SwitchModeDuration = config.DefaultSwitchTiKVModeInterval