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

Some times there are not output from requests.
new_part_name,
        choosePartTypeOnDisk(0, block.rows()),
        new_part_info,
        new_data_part_storage
        );
    new_data_part->name = new_part_name;
    if (settings->assign_part_uuids)
        new_data_part->uuid = UUIDHelpers::generateV4();
    new_data_part->setColumns(columns, {});
    new_data_part->rows_count = block.rows();
    new_data_part->partition = partition;
    new_data_part->minmax_idx = std::move(minmax_idx);
    new_data_part->is_temp = true;
    SyncGuardPtr sync_guard;
    if (new_data_part->isStoredOnDisk())
    {
        
        if (new_data_part_storage->exists())
        {
            
            
            throw Exception(ErrorCodes::LOGICAL_ERROR,
                            "New empty part is about to matirialize but the dirrectory already exist"
                            ", new part {}"
                            ", directory {}",
                            new_part_name, new_data_part_storage->getFullPath());
        }
        new_data_part_storage->createDirectories();
        if (getSettings()->fsync_part_directory)
            sync_guard = new_data_part_storage->getDirectorySyncGuard();