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Choose the right algorithm for your data. ClickHouse provides multiple join algorithms via the join_algorithm setting, each trading off memory usage against performance. Hash joins are fast but memory-bound. Grace hash partitions data into buckets and spills to disk when memory is exhausted. Sort-merge variants (partial_merge, full_sorting_merge) work well for pre-sorted data or when both sides are too large for memory. The direct algorithm acts as a fast key-value lookup when the right table is backed by a dictionary or a small in-memory table. Setting join_algorithm = 'auto' lets ClickHouse adaptively select the best algorithm at runtime based on available resources.
。关于这个话题，新收录的资料提供了深入分析
这套方式的关键是把**“思考（Model）”与“沉淀（Document）”**绑定到同一条流水线：生成、校对、结构化输出、二次迭代，都能在一个入口里完成。
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