Backup: Do not fill cache when backup rawkv
close tikv/tikv#13020
@@ -454,6 +454,7 @@ impl BackupRange {
let mut cursor = CursorBuilder::new(snapshot, self.cf)
.range(None, self.end_key.clone())
.scan_mode(ScanMode::Forward)
+ .fill_cache(false)
.build()?;
if let Some(begin) = self.start_key.clone() {
if !cursor.seek(&begin, cfstatistics)? {
