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tests: improve 02340_parts_refcnt_mergetree (from 12sec to 1sec)

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Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
This commit is contained in:
Azat Khuzhin 2024-05-16 14:43:42 +02:00
parent 0832f96107
commit 722b7ab522
1 changed files with 12 additions and 10 deletions
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22
tests/queries/0_stateless/02340_parts_refcnt_mergetree.sh
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@ -19,33 +19,33 @@ function check_refcnt_for_table()
local query_id
query_id="$table-$(random_str 10)"
local log_file
log_file=$(mktemp "$CUR_DIR/clickhouse-tests.XXXXXX.log")
local args=(
--format Null
--max_threads 1
--max_block_size 1
--merge_tree_read_split_ranges_into_intersecting_and_non_intersecting_injection_probability 0.0
--query_id "$query_id"
--send_logs_level "test"
--server_logs_file "$log_file"
)
# Notes:
# - query may sleep 1*(200/4)=50 seconds maximum, it is enough to check system.parts
# - query may sleep 0.1*(200/4)=5 seconds maximum, it is enough to check system.parts
# - "part = 1" condition should prune all parts except first
# - max_block_size=1 with index_granularity=1 will allow to cancel the query earlier
$CLICKHOUSE_CLIENT "${args[@]}" -q "select sleepEachRow(1) from $table where part = 1" &
$CLICKHOUSE_CLIENT "${args[@]}" -q "select sleepEachRow(0.1) from $table where part = 1" &
PID=$!
# wait for query to be started
while [ "$($CLICKHOUSE_CLIENT -q "select count() from system.processes where query_id = '$query_id'")" -ne 1 ]; do
sleep 0.1
done
# When the query only starts it execution it holds reference for each part,
# however when it starts reading, partition pruning takes place,
# and it should hold only parts that are required for SELECT
#
# But to reach partition prune the function sleepEachRow() will be executed twice,
# so 2 seconds for sleepEachRow() and 3 seconds just to ensure that it enters the reading stage.
sleep $((2+3))
# So let's wait while the reading will be started.
while ! grep -F -q -e "Exception" -e "MergeTreeRangeReader" "$log_file"; do
sleep 0.1
done
# NOTE: parts that are used in query will have refcount increased for each range
$CLICKHOUSE_CLIENT -q "select table, name, refcount from system.parts where database = '$CLICKHOUSE_DATABASE' and table = '$table' and refcount > 1"
@ -53,6 +53,8 @@ function check_refcnt_for_table()
# Kill the query gracefully.
kill -INT $PID
wait $PID
grep -F Exception "$log_file" | grep -v -F QUERY_WAS_CANCELLED
rm -f "${log_file:?}"
}
# NOTE: index_granularity=1 to cancel ASAP