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ps_trace_thread.sql
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/* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
DROP PROCEDURE IF EXISTS ps_trace_thread;
DELIMITER $$
CREATE DEFINER=CURRENT_USER PROCEDURE ps_trace_thread (
IN in_thread_id INT,
IN in_outfile VARCHAR(255),
IN in_max_runtime DECIMAL(20,2),
IN in_interval DECIMAL(20,2),
IN in_start_fresh BOOLEAN,
IN in_auto_setup BOOLEAN,
IN in_debug BOOLEAN
)
COMMENT '
Description
-----------
Dumps all data within Performance Schema for an instrumented thread,
to create a DOT formatted graph file.
Each resultset returned from the procedure should be used for a complete graph
Parameters
-----------
in_thread_id (INT):
The thread that you would like a stack trace for
in_outfile (VARCHAR(255)):
The filename the dot file will be written to
in_max_runtime (DECIMAL(20,2)):
The maximum time to keep collecting data.
Use NULL to get the default which is 60 seconds.
in_interval (DECIMAL(20,2)):
How long to sleep between data collections.
Use NULL to get the default which is 1 second.
in_start_fresh (BOOLEAN):
Whether to reset all Performance Schema data before tracing.
in_auto_setup (BOOLEAN):
Whether to disable all other threads and enable all consumers/instruments.
This will also reset the settings at the end of the run.
in_debug (BOOLEAN):
Whether you would like to include file:lineno in the graph
Example
-----------
mysql> CALL sys.ps_dump_thread_stack(25, CONCAT(\'/tmp/stack-\', REPLACE(NOW(), \' \', \'-\'), \'.dot\'), NULL, NULL, TRUE, TRUE, TRUE);
+-------------------+
| summary |
+-------------------+
| Disabled 1 thread |
+-------------------+
1 row in set (0.00 sec)
+---------------------------------------------+
| Info |
+---------------------------------------------+
| Data collection starting for THREAD_ID = 25 |
+---------------------------------------------+
1 row in set (0.03 sec)
+-----------------------------------------------------------+
| Info |
+-----------------------------------------------------------+
| Stack trace written to /tmp/stack-2014-02-16-21:18:41.dot |
+-----------------------------------------------------------+
1 row in set (60.07 sec)
+-------------------------------------------------------------------+
| Convert to PDF |
+-------------------------------------------------------------------+
| dot -Tpdf -o /tmp/stack_25.pdf /tmp/stack-2014-02-16-21:18:41.dot |
+-------------------------------------------------------------------+
1 row in set (60.07 sec)
+-------------------------------------------------------------------+
| Convert to PNG |
+-------------------------------------------------------------------+
| dot -Tpng -o /tmp/stack_25.png /tmp/stack-2014-02-16-21:18:41.dot |
+-------------------------------------------------------------------+
1 row in set (60.07 sec)
+------------------+
| summary |
+------------------+
| Enabled 1 thread |
+------------------+
1 row in set (60.32 sec)
'
SQL SECURITY INVOKER
NOT DETERMINISTIC
MODIFIES SQL DATA
BEGIN
DECLARE v_done bool DEFAULT FALSE;
DECLARE v_start, v_runtime DECIMAL(20,2) DEFAULT 0.0;
DECLARE v_min_event_id bigint unsigned DEFAULT 0;
DECLARE v_event longtext;
DECLARE c_stack CURSOR FOR
SELECT CONCAT(IF(nesting_event_id IS NOT NULL, CONCAT(nesting_event_id, ' -> '), ''),
event_id, '; ', event_id, ' [label="',
/* Convert from picoseconds to microseconds */
'(', sys.format_time(timer_wait), ') ',
IF (event_name NOT LIKE 'wait/io%',
SUBSTRING_INDEX(event_name, '/', -2),
IF (event_name NOT LIKE 'wait/io/file%' OR event_name NOT LIKE 'wait/io/socket%',
SUBSTRING_INDEX(event_name, '/', -4),
event_name)
),
/* Always dump the extra wait information gathered for statements */
IF (event_name LIKE 'statement/%', IFNULL(CONCAT('\\n', wait_info), ''), ''),
/* If debug is enabled, add the file:lineno information for waits */
IF (in_debug AND event_name LIKE 'wait%', wait_info, ''),
'", ',
/* Depending on the type of event, style appropriately */
CASE WHEN event_name LIKE 'wait/io/file%' THEN
'shape=box, style=filled, color=red'
WHEN event_name LIKE 'wait/io/table%' THEN
'shape=box, style=filled, color=green'
WHEN event_name LIKE 'wait/io/socket%' THEN
'shape=box, style=filled, color=yellow'
WHEN event_name LIKE 'wait/synch/mutex%' THEN
'style=filled, color=lightskyblue'
WHEN event_name LIKE 'wait/synch/cond%' THEN
'style=filled, color=darkseagreen3'
WHEN event_name LIKE 'wait/synch/rwlock%' THEN
'style=filled, color=orchid'
WHEN event_name LIKE 'wait/lock%' THEN
'shape=box, style=filled, color=tan'
WHEN event_name LIKE 'statement/%' THEN
CONCAT('shape=box, style=bold',
/* Style statements depending on COM vs SQL */
CASE WHEN event_name LIKE 'statement/com/%' THEN
' style=filled, color=darkseagreen'
ELSE
/* Use long query time from the server to
flag long running statements in red */
IF((timer_wait/1000000000000) > @@long_query_time,
' style=filled, color=red',
' style=filled, color=lightblue')
END
)
WHEN event_name LIKE 'stage/%' THEN
'style=filled, color=slategray3'
/* IDLE events are on their own, call attention to them */
WHEN event_name LIKE '%idle%' THEN
'shape=box, style=filled, color=firebrick3'
ELSE '' END,
'];\n'
) event, event_id
FROM (
/* Select all statements, with the extra tracing information available */
(SELECT thread_id, event_id, event_name, timer_wait, timer_start, nesting_event_id,
CONCAT(sql_text, '\\n',
'errors: ', errors, '\\n',
'warnings: ', warnings, '\\n',
'lock time: ', sys.format_time(lock_time),'\\n',
'rows affected: ', rows_affected, '\\n',
'rows sent: ', rows_sent, '\\n',
'rows examined: ', rows_examined, '\\n',
'tmp tables: ', created_tmp_tables, '\\n',
'tmp disk tables: ', created_tmp_disk_tables, '\\n'
'select scan: ', select_scan, '\\n',
'select full join: ', select_full_join, '\\n',
'select full range join: ', select_full_range_join, '\\n',
'select range: ', select_range, '\\n',
'select range check: ', select_range_check, '\\n',
'sort merge passes: ', sort_merge_passes, '\\n',
'sort rows: ', sort_rows, '\\n',
'sort range: ', sort_range, '\\n',
'sort scan: ', sort_scan, '\\n',
'no index used: ', IF(no_index_used, 'TRUE', 'FALSE'), '\\n',
'no good index used: ', IF(no_good_index_used, 'TRUE', 'FALSE'), '\\n'
) AS wait_info
FROM performance_schema.events_statements_history_long
WHERE thread_id = in_thread_id AND event_id > v_min_event_id)
UNION
/* Select all stages */
(SELECT thread_id, event_id, event_name, timer_wait, timer_start, nesting_event_id, null AS wait_info
FROM performance_schema.events_stages_history_long
WHERE thread_id = in_thread_id AND event_id > v_min_event_id)
UNION
/* Select all events, adding information appropriate to the event */
(SELECT thread_id, event_id,
CONCAT(event_name,
IF(event_name NOT LIKE 'wait/synch/mutex%', IFNULL(CONCAT(' - ', operation), ''), ''),
IF(number_of_bytes IS NOT NULL, CONCAT(' ', number_of_bytes, ' bytes'), ''),
IF(event_name LIKE 'wait/io/file%', '\\n', ''),
IF(object_schema IS NOT NULL, CONCAT('\\nObject: ', object_schema, '.'), ''),
IF(object_name IS NOT NULL,
IF (event_name LIKE 'wait/io/socket%',
/* Print the socket if used, else the IP:port as reported */
CONCAT('\\n', IF (object_name LIKE ':0%', @@socket, object_name)),
object_name),
''
),
IF(index_name IS NOT NULL, CONCAT(' Index: ', index_name), ''), '\\n'
) AS event_name,
timer_wait, timer_start, nesting_event_id, source AS wait_info
FROM performance_schema.events_waits_history_long
WHERE thread_id = in_thread_id AND event_id > v_min_event_id)
) events
ORDER BY event_id;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET v_done = TRUE;
/* Do not track the current thread, it will kill the stack */
CALL sys.ps_setup_disable_thread(CONNECTION_ID());
IF (in_auto_setup) THEN
CALL sys.ps_setup_save(0);
/* Ensure only the thread to create the stack trace for is instrumented and that we instrument
everything. */
DELETE FROM performance_schema.setup_actors;
UPDATE performance_schema.threads
SET INSTRUMENTED = IF(THREAD_ID = in_thread_id, 'YES', 'NO');
UPDATE performance_schema.setup_consumers
SET ENABLED = 'YES'
WHERE NAME NOT LIKE '%\_history'; -- only the %_history_long tables and it ancestors are needed
UPDATE performance_schema.setup_instruments
SET ENABLED = 'YES',
TIMED = 'YES';
END IF;
IF (in_start_fresh) THEN
TRUNCATE performance_schema.events_statements_history_long;
TRUNCATE performance_schema.events_stages_history_long;
TRUNCATE performance_schema.events_waits_history_long;
END IF;
DROP TEMPORARY TABLE IF EXISTS tmp_events;
CREATE TEMPORARY TABLE tmp_events (
event_id bigint unsigned NOT NULL,
event longblob,
PRIMARY KEY (event_id)
);
/* Print headers for a .dot file */
INSERT INTO tmp_events VALUES (0, CONCAT('digraph events { rankdir=LR; nodesep=0.10;\n',
'// Stack created .....: ', NOW(), '\n',
'// MySQL version .....: ', VERSION(), '\n',
'// MySQL hostname ....: ', @@hostname, '\n',
'// MySQL port ........: ', @@port, '\n',
'// MySQL socket ......: ', @@socket, '\n',
'// MySQL user ........: ', CURRENT_USER(), '\n'));
SELECT CONCAT('Data collection starting for THREAD_ID = ', in_thread_id) AS 'Info';
SET v_min_event_id = 0,
v_start = UNIX_TIMESTAMP(),
in_interval = IFNULL(in_interval, 1.00),
in_max_runtime = IFNULL(in_max_runtime, 60.00);
WHILE (v_runtime < in_max_runtime
AND (SELECT INSTRUMENTED FROM performance_schema.threads WHERE THREAD_ID = in_thread_id) = 'YES') DO
SET v_done = FALSE;
OPEN c_stack;
c_stack_loop: LOOP
FETCH c_stack INTO v_event, v_min_event_id;
IF v_done THEN
LEAVE c_stack_loop;
END IF;
IF (LENGTH(v_event) > 0) THEN
INSERT INTO tmp_events VALUES (v_min_event_id, v_event);
END IF;
END LOOP;
CLOSE c_stack;
SELECT SLEEP(in_interval) INTO @sleep;
SET v_runtime = v_runtime + (UNIX_TIMESTAMP() - v_start);
END WHILE;
INSERT INTO tmp_events VALUES (v_min_event_id+1, '}');
SET @query = CONCAT('SELECT event FROM tmp_events ORDER BY event_id INTO OUTFILE ''', in_outfile, ''' FIELDS ESCAPED BY '''' LINES TERMINATED BY ''''');
PREPARE stmt_output FROM @query;
EXECUTE stmt_output;
DEALLOCATE PREPARE stmt_output;
SELECT CONCAT('Stack trace written to ', in_outfile) AS 'Info';
SELECT CONCAT('dot -Tpdf -o /tmp/stack_', in_thread_id, '.pdf ', in_outfile) AS 'Convert to PDF';
SELECT CONCAT('dot -Tpng -o /tmp/stack_', in_thread_id, '.png ', in_outfile) AS 'Convert to PNG';
DROP TEMPORARY TABLE tmp_events;
/* Reset the settings for the performance schema */
IF (in_auto_setup) THEN
CALL sys.ps_setup_reload_saved();
CALL sys.ps_setup_enable_thread(CONNECTION_ID());
END IF;
END$$
DELIMITER ;