As well as the poor selection of a partition key, this issue can manifest itself as a result of many small inserts. Each INSERT into ClickHouse results in an insert block being converted to a part. To keep the number of parts manageable, users should therefore buffer data client-side and insert data as batches - at a minimum 1,000 rows per insert, although batch sizes of 10,000 to 100,000 rows are optimal. If client-side buffering is not possible, users can defer this task to ClickHouse through async inserts. In this case, ClickHouse will buffer inserts in memory before flushing them as a single batched part into the underlying table. The flush is triggered when a configurable threshold is met: a buffer size limit (async_insert_max_data_size, default 1MB), a time threshold (async_insert_busy_timeout_ms, default 1 second), or a maximum number of queued queries (async_insert_max_query_number, default 100). Since data is held in memory until flush, it is important to set wait_for_async_insert=1 (the default) so that the client receives acknowledgement only after data has been safely written to disk, avoiding silent data loss in the event of a server crash before a flush.
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，这一点在搜狗输入法中也有详细论述
I care quite deeply about scientific communication.。https://telegram官网对此有专业解读
图片来源：Valentyn Ogirenko / Reuters
中泰证券2月发布的一份研报中表示，比亚迪在当时采取了降低批发出货的方式，以控制终端库存与生产节奏，这是为了降低渠道库位压力，来匹配技术发布会以及之后的新品周期上量节奏。