mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-06 06:22:39 +00:00
20 lines
864 B
SQL
20 lines
864 B
SQL
DROP TABLE IF EXISTS test;
|
|
CREATE TABLE test (s String) ENGINE = MergeTree ORDER BY s SETTINGS index_granularity = 1;
|
|
|
|
SET optimize_trivial_insert_select = 1;
|
|
INSERT INTO test SELECT randomString(1000) FROM numbers(100000);
|
|
SELECT round(primary_key_bytes_in_memory, -7), round(primary_key_bytes_in_memory_allocated, -7) FROM system.parts WHERE database = currentDatabase() AND table = 'test';
|
|
|
|
DETACH TABLE test;
|
|
SET max_memory_usage = '50M';
|
|
ATTACH TABLE test;
|
|
|
|
SELECT primary_key_bytes_in_memory, primary_key_bytes_in_memory_allocated FROM system.parts WHERE database = currentDatabase() AND table = 'test';
|
|
|
|
SET max_memory_usage = '200M';
|
|
SELECT s != '' FROM test LIMIT 1;
|
|
|
|
SELECT round(primary_key_bytes_in_memory, -7), round(primary_key_bytes_in_memory_allocated, -7) FROM system.parts WHERE database = currentDatabase() AND table = 'test';
|
|
|
|
DROP TABLE test;
|