mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-24 16:42:05 +00:00
d030e08d05
By comparing only megabytes in the memory changes, instead of bytes as before, since it may be tricky at least due to max_untracked_memory and how thread pool handle it. It should be safe, since originally it was written in #16121 which fixes issue #15932, which has ~4MB consumption of memory per request.
106 lines
3.4 KiB
Python
106 lines
3.4 KiB
Python
# pylint: disable=unused-argument
|
|
# pylint: disable=redefined-outer-name
|
|
# pylint: disable=line-too-long
|
|
|
|
# This test verifies that memory tracking does not have significant drift,
|
|
# in other words, every allocation should be taken into account at the global
|
|
# memory tracker.
|
|
#
|
|
# So we are running some queries with GROUP BY to make some allocations,
|
|
# and after we are checking MemoryTracking metric from system.metrics,
|
|
# and check that it does not changes too frequently.
|
|
#
|
|
# Also note, that syncing MemoryTracking with RSS had been disabled in
|
|
# asynchronous_metrics_update_period_s.xml.
|
|
|
|
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',
|
|
], user_configs=[
|
|
'configs/users.d/overrides.xml',
|
|
])
|
|
|
|
@pytest.fixture(scope='module', autouse=True)
|
|
def start_cluster():
|
|
try:
|
|
cluster.start()
|
|
yield cluster
|
|
finally:
|
|
cluster.shutdown()
|
|
|
|
query_settings = {
|
|
'max_threads': 1,
|
|
'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):
|
|
# bytes -> megabytes
|
|
memory = [*map(lambda x: int(int(x)/1024/1024), 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)
|