ClickHouse/tests/integration/test_MemoryTracking/test.py

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# pylint: disable=unused-argument
# pylint: disable=redefined-outer-name
# pylint: disable=line-too-long
import logging
import pytest
from helpers.cluster import ClickHouseCluster
cluster = ClickHouseCluster(__file__)
node = cluster.add_instance('node', main_configs=[
'configs/no_system_log.xml',
'configs/asynchronous_metrics_update_period_s.xml',
])
@pytest.fixture(scope='module', autouse=True)
def start_cluster():
try:
cluster.start()
yield cluster
finally:
cluster.shutdown()
query_settings = {
'max_threads': 1,
'query_profiler_real_time_period_ns': 0,
'query_profiler_cpu_time_period_ns': 0,
'log_queries': 0,
}
sample_query = "SELECT groupArray(repeat('a', 1000)) FROM numbers(10000) GROUP BY number%10 FORMAT JSON"
def query(*args, **kwargs):
if 'settings' not in kwargs:
kwargs['settings'] = query_settings
else:
kwargs['settings'].update(query_settings)
return node.query(*args, **kwargs)
def http_query(*args, **kwargs):
if 'params' not in kwargs:
kwargs['params'] = query_settings
else:
kwargs['params'].update(query_settings)
return node.http_query(*args, **kwargs)
def get_MemoryTracking():
return int(http_query("SELECT value FROM system.metrics WHERE metric = 'MemoryTracking'"))
def check_memory(memory):
# 3 changes to MemoryTracking is minimum, since:
# - this is not that high to not detect inacuracy
# - memory can go like X/X+N due to some background allocations
# - memory can go like X/X+N/X, so at least 2 changes
changes_allowed = 3
# if number of samples is large enough, use 10% from them
# (actually most of the time there will be only few changes, it was made 10% to avoid flackiness)
changes_allowed_auto=int(len(memory) * 0.1)
changes_allowed = max(changes_allowed_auto, changes_allowed)
changed=len(set(memory))
logging.info('Changes: allowed=%s, actual=%s, sample=%s',
changes_allowed, changed, len(memory))
assert changed < changes_allowed
def test_http():
memory = []
memory.append(get_MemoryTracking())
for _ in range(100):
http_query(sample_query)
memory.append(get_MemoryTracking())
check_memory(memory)
def test_tcp_multiple_sessions():
memory = []
memory.append(get_MemoryTracking())
for _ in range(100):
query(sample_query)
memory.append(get_MemoryTracking())
check_memory(memory)
def test_tcp_single_session():
memory = []
memory.append(get_MemoryTracking())
sample_queries = [
sample_query,
"SELECT metric, value FROM system.metrics WHERE metric = 'MemoryTracking'",
] * 100
rows = query(';'.join(sample_queries))
memory = rows.split('\n')
memory = filter(lambda x: x.startswith('MemoryTracking'), memory)
memory = map(lambda x: x.split('\t')[1], memory)
memory = [*memory]
check_memory(memory)