mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 18:02:24 +00:00
25 lines
1.1 KiB
MySQL
25 lines
1.1 KiB
MySQL
|
-- Tags: no-parallel
|
||
|
|
-- Tag no-parallel: to decrease failure probability of collecting stack traces
|
||
|
|
|
||
|
|
-- Process one thread at a time
|
||
|
|
SET max_block_size = 1;
|
||
|
|
|
||
|
|
-- It is OK to have bigger timeout here since:
|
||
|
|
-- a) this test is marked as no-parallel
|
||
|
|
-- b) there is a filter by thread_name, so it will send signals only to the threads with the name TCPHandler
|
||
|
|
-- c) max_block_size is 1
|
||
|
|
SET storage_system_stack_trace_pipe_read_timeout_ms = 5000;
|
||
|
|
|
||
|
|
-- { echo }
|
||
|
|
SELECT count() > 0 FROM system.stack_trace WHERE query_id != '' AND thread_name = 'TCPHandler';
|
||
|
|
-- opimization for not reading /proc/self/task/{}/comm and avoid sending signal
|
||
|
|
SELECT countIf(thread_id > 0) > 0 FROM system.stack_trace;
|
||
|
|
-- optimization for trace
|
||
|
|
SELECT length(trace) > 0 FROM system.stack_trace WHERE length(trace) > 0 LIMIT 1;
|
||
|
|
-- optimization for query_id
|
||
|
|
SELECT length(query_id) > 0 FROM system.stack_trace WHERE query_id != '' AND thread_name = 'TCPHandler' LIMIT 1;
|
||
|
|
-- optimization for thread_name
|
||
|
|
SELECT length(thread_name) > 0 FROM system.stack_trace WHERE thread_name != '' LIMIT 1;
|
||
|
|
-- enough rows (optimizations works "correctly")
|
||
|
|
SELECT count() > 100 FROM system.stack_trace;
|