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52 lines
1.7 KiB
Python
52 lines
1.7 KiB
Python
import pytest
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from helpers.cluster import ClickHouseCluster
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cluster = ClickHouseCluster(__file__)
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node = cluster.add_instance(
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"node", main_configs=["configs/config.xml"], with_zookeeper=True
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)
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@pytest.fixture(scope="module")
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def started_cluster():
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try:
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cluster.start()
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yield cluster
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finally:
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cluster.shutdown()
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def test_huge_column(started_cluster):
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# max_server_memory_usage is set to 1GB
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# Added column should be 1e6 * 2000 ~= 2GB
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# ALTER ADD COLUMN + MATRIALIZE COLUMN should not cause big memory consumption
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node.query(
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"""
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create table test_fetch (x UInt64) engine = ReplicatedMergeTree('/clickhouse/tables/test_fetch', 'r1') order by x settings index_granularity=1024;
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insert into test_fetch select number from numbers(1e6);
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set mutations_sync=1;
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alter table test_fetch add column y String default repeat(' ', 2000) CODEC(NONE);
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alter table test_fetch materialize column y;
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create table test_fetch2 (x UInt64, y String default repeat(' ', 2000) CODEC(NONE)) engine = ReplicatedMergeTree('/clickhouse/tables/test_fetch', 'r2') order by x settings index_granularity=1024;
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"""
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)
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# Here we just check that fetch has started.
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node.query(
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"""
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set receive_timeout=1;
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system sync replica test_fetch2;
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""",
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ignore_error=True,
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)
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# Here we check that fetch did not use too much memory.
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# See https://github.com/ClickHouse/ClickHouse/issues/39915
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maybe_exception = node.query(
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"select last_exception from system.replication_queue where last_exception like '%Memory limit%';"
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)
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assert maybe_exception == ""
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