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Is there a native way in ClickHouse for buffering inserts?

sobes.tech AI

Answer from AI

ClickHouse has a native buffering mechanism for inserts — this is the Buffer table engine. It allows accumulating data in memory and periodically flushing it to the main table, reducing disk load and increasing performance during bulk inserts.

Example of creating a buffer table:

CREATE TABLE main_table (
    id UInt64,
    value String
) ENGINE = MergeTree() ORDER BY id;

CREATE TABLE buffer_table AS main_table ENGINE = Buffer(default, main_table, 16, 10, 60, 10000, 1000000, 10000000);

Here, Buffer accumulates data and, based on specified parameters (such as number of rows or time), flushes it to main_table. This is a native buffering method without additional client-side code.

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