Buffer tables exist as a legacy alternative. Their unique advantage is that data is queryable while still in the buffer, before flush to the destination table. However, Buffer tables have significant drawbacks: they are not replicated, are not compatible with FINAL or SAMPLE, and can lose data on abnormal server restarts. In ClickHouse Cloud with SharedMergeTree, each node maintains independent buffer state, adding further complexity. For nearly all use cases, async inserts are the recommended approach. Buffer tables should only be considered in rare scenarios where querying in-buffer data before flush is a hard requirement.
Performance on cost-efficient deployments (L40S)
Любовь Ширижик (Старший редактор отдела «Силовые структуры»)，更多细节参见新收录的资料
With 10,000 rows across 74 pages, the planner picks a sequential scan.
，更多细节参见新收录的资料
When things are changing, or have changed, human instinct varies.
Вирус стирает память?Как избежать когнитивных расстройств после перенесенной коронавирусной инфекции18 февраля 2021。新收录的资料是该领域的重要参考