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80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
import pytest
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import logging
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import time
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from helpers.cluster import ClickHouseCluster, run_and_check
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cluster = ClickHouseCluster(__file__)
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node1 = cluster.add_instance(
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"node1", main_configs=["config/text_log.xml"], mem_limit="5g"
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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 get_latest_mem_limit():
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for _ in range(10):
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try:
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mem_limit = float(
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node1.query(
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"""
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select extract(message, '\\d+\\.\\d+') from system.text_log
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where message like '%Setting max_server_memory_usage was set to%' and
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message not like '%like%' order by event_time desc limit 1
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"""
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).strip()
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)
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return mem_limit
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except Exception:
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time.sleep(1)
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raise Exception("Cannot get memory limit")
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def test_observe_memory_limit(started_cluster):
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original_max_mem = get_latest_mem_limit()
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logging.debug(f"get original memory limit {original_max_mem}")
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run_and_check(["docker", "update", "--memory=10g", node1.docker_id])
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for _ in range(30):
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time.sleep(10)
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new_max_mem = get_latest_mem_limit()
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logging.debug(f"get new memory limit {new_max_mem}")
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if new_max_mem > original_max_mem:
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return
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raise Exception("the memory limit does not increase as expected")
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def test_memory_usage_doesnt_include_page_cache_size(started_cluster):
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try:
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# populate page cache with 4GB of data; it might be killed by OOM killer but it is fine
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node1.exec_in_container(
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["dd", "if=/dev/zero", "of=outputfile", "bs=1M", "count=4K"]
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)
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except Exception:
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pass
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observer_refresh_period = int(
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node1.query(
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"select value from system.server_settings where name = 'cgroups_memory_usage_observer_wait_time'"
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).strip()
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)
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time.sleep(observer_refresh_period + 1)
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max_mem_usage_from_cgroup = node1.query(
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"""
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SELECT max(toUInt64(replaceRegexpAll(message, 'Read current memory usage (\\d+) bytes.*', '\\1'))) AS max_mem
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FROM system.text_log
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WHERE logger_name = 'CgroupsMemoryUsageObserver' AND message LIKE 'Read current memory usage%bytes%'
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"""
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).strip()
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assert int(max_mem_usage_from_cgroup) < 2 * 2**30
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