Россиянам напомнили о грядущих длинных выходныхДлинные выходные из-за праздников ждут россиян в начале мая
Сын Хаменеи попал под ударСын Хаменеи Моджтаба получил ранения в ходе атаки，更多细节参见新收录的资料
。新收录的资料是该领域的重要参考
Российская певица Лариса Долина выступит 8 Марта на корпоративе с петербургскими банкирами. Об этом сообщает Telegram-канал Shot.。关于这个话题，新收录的资料提供了深入分析
We also see even experienced users being caught by less obvious LIMIT behavior in multi-node environments where a table has many shards. Sharding allows users to split or replicate their data across multiple instances of ClickHouse. When a query with a LIMIT N clause is sent to a sharded table e.g. via a distributed table, this clause will be propagated down to each shard. Each shard will, in turn, need to collate the top N results, returning them to the coordinating node. This can prove particularly resource-intensive when users run queries that require a full table scan. Typically these are "point lookups" where the query aims to just identify a few rows. While this can be achieved in ClickHouse with careful index design a non-optimized variant, coupled with a LIMIT clause, can prove extremely resource-intensive.