Statistics
https://play.clickhouse.com/play?user=play#c2VsZWN0IAp0b1N0YXJ0T2ZIb3VyKGNoZWNrX3N0YXJ0X3RpbWUpIGFzIGQsCmNvdW50KCksICBncm91cFVuaXFBcnJheShwdWxsX3JlcXVlc3RfbnVtYmVyKSwgIGFueShyZXBvcnRfdXJsKQpmcm9tIGNoZWNrcyB3aGVyZSAnMjAyMi0wNi0wMScgPD0gY2hlY2tfc3RhcnRfdGltZSBhbmQgdGVzdF9uYW1lIGxpa2UgJyUwMjQ5MV9wYXJ0X2xvZ19oYXNfdGFibGVfdXVpZCUnIGFuZCB0ZXN0X3N0YXR1cyBpbiAoJ0ZBSUwnLCAnRkxBS1knKSBncm91cCBieSBkIG9yZGVyIGJ5IGQgZGVzYw==

Some times there are not output from requests.
{
    BackupEntries backup_entries;
    std::map<DiskPtr, std::shared_ptr<TemporaryFileOnDisk>> temp_dirs;
    TableLockHolder table_lock;
    for (const auto & part : data_parts)
    {
        
        bool make_temporary_hard_links = true;
        bool hold_storage_and_part_ptrs = false;
        bool hold_table_lock = false;
        if (getStorageID().hasUUID())
        {
            
            
            
            make_temporary_hard_links = false;
            hold_storage_and_part_ptrs = true;
        }
        else if (supportsReplication() && part->getDataPartStorage().supportZeroCopyReplication() && getSettings()->allow_remote_fs_zero_copy_replication)
        {
            
            make_temporary_hard_links = false;
            hold_storage_and_part_ptrs = true;
            hold_table_lock = true;
        }
        if (hold_table_lock && !table_lock)
            table_lock = lockForShare(local_context->getCurrentQueryId(), local_context->getSettingsRef().lock_acquire_timeout);
        BackupEntries backup_entries_from_part;
        part->getDataPartStorage().backup(
            part->checksums,