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io_by_thread_by_latency.sql
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io_by_thread_by_latency.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 */
/*
* View: io_by_thread_by_latency
*
* Show the top IO consumers by thread, ordered by total latency
*
* mysql> select * from io_by_thread_by_latency;
* +---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+
* | user | total | total_latency | min_latency | avg_latency | max_latency | thread_id | processlist_id |
* +---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+
* | root@localhost | 11580 | 18.01 s | 429.78 ns | 1.12 ms | 181.07 ms | 25 | 6 |
* | main | 1358 | 1.31 s | 475.02 ns | 2.27 ms | 350.70 ms | 1 | NULL |
* | page_cleaner_thread | 654 | 147.44 ms | 588.12 ns | 225.44 us | 46.41 ms | 18 | NULL |
* | io_write_thread | 131 | 107.75 ms | 8.60 us | 822.55 us | 27.69 ms | 8 | NULL |
* | io_write_thread | 46 | 47.07 ms | 10.64 us | 1.02 ms | 16.90 ms | 9 | NULL |
* | io_write_thread | 71 | 46.99 ms | 9.11 us | 661.81 us | 17.04 ms | 11 | NULL |
* | io_log_thread | 20 | 21.01 ms | 14.25 us | 1.05 ms | 7.08 ms | 3 | NULL |
* | srv_master_thread | 13 | 17.60 ms | 8.49 us | 1.35 ms | 9.99 ms | 16 | NULL |
* | srv_purge_thread | 4 | 1.81 ms | 34.31 us | 452.45 us | 1.02 ms | 17 | NULL |
* | io_write_thread | 19 | 951.39 us | 9.75 us | 50.07 us | 297.47 us | 10 | NULL |
* | signal_handler | 3 | 218.03 us | 21.64 us | 72.68 us | 154.84 us | 19 | NULL |
* +---------------------+-------+---------------+-------------+-------------+-------------+-----------+----------------+
*
*/
CREATE OR REPLACE
ALGORITHM = TEMPTABLE
DEFINER = 'root'@'localhost'
SQL SECURITY INVOKER
VIEW io_by_thread_by_latency (
user,
total,
total_latency,
min_latency,
avg_latency,
max_latency,
thread_id,
processlist_id
)
AS
SELECT IF(processlist_id IS NULL,
SUBSTRING_INDEX(name, '/', -1),
CONCAT(processlist_user, '@', processlist_host)
) user,
SUM(count_star) total,
sys.format_time(SUM(sum_timer_wait)) total_latency,
sys.format_time(MIN(min_timer_wait)) min_latency,
sys.format_time(AVG(avg_timer_wait)) avg_latency,
sys.format_time(MAX(max_timer_wait)) max_latency,
thread_id,
processlist_id
FROM performance_schema.events_waits_summary_by_thread_by_event_name
LEFT JOIN performance_schema.threads USING (thread_id)
WHERE event_name LIKE 'wait/io/file/%'
AND sum_timer_wait > 0
GROUP BY thread_id
ORDER BY SUM(sum_timer_wait) DESC;
/*
* View: x$io_by_thread_by_latency
*
* Show the top IO consumers by thread, ordered by total latency
*
* mysql> select * from x$io_by_thread_by_latency;
* +---------------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+
* | user | total | total_latency | min_latency | avg_latency | max_latency | thread_id | processlist_id |
* +---------------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+
* | root@localhost | 11587 | 18007539905680 | 429780 | 1120831681.6667 | 181065665560 | 25 | 6 |
* | main | 1358 | 1309001741320 | 475020 | 2269581997.8000 | 350700491310 | 1 | NULL |
* | page_cleaner_thread | 654 | 147435455960 | 588120 | 225436198.0000 | 46412043990 | 18 | NULL |
* | io_write_thread | 131 | 107754483070 | 8603140 | 822553303.0000 | 27691592500 | 8 | NULL |
* | io_write_thread | 46 | 47074926860 | 10642710 | 1023367631.0000 | 16899745070 | 9 | NULL |
* | io_write_thread | 71 | 46988801210 | 9108320 | 661814075.0000 | 17042760020 | 11 | NULL |
* | io_log_thread | 20 | 21007710490 | 14250600 | 1050385336.0000 | 7081255090 | 3 | NULL |
* | srv_master_thread | 13 | 17601511720 | 8486270 | 1353962324.0000 | 9990100380 | 16 | NULL |
* | srv_purge_thread | 4 | 1809792270 | 34307000 | 452447879.0000 | 1018887740 | 17 | NULL |
* | io_write_thread | 19 | 951385890 | 9745450 | 50072763.0000 | 297468080 | 10 | NULL |
* | signal_handler | 3 | 218026640 | 21639800 | 72675421.0000 | 154841440 | 19 | NULL |
* +---------------------+-------+----------------+-------------+-----------------+--------------+-----------+----------------+
*
*/
CREATE OR REPLACE
ALGORITHM = TEMPTABLE
DEFINER = 'root'@'localhost'
SQL SECURITY INVOKER
VIEW x$io_by_thread_by_latency (
user,
total,
total_latency,
min_latency,
avg_latency,
max_latency,
thread_id,
processlist_id
)
AS
SELECT IF(processlist_id IS NULL,
SUBSTRING_INDEX(name, '/', -1),
CONCAT(processlist_user, '@', processlist_host)
) user,
SUM(count_star) total,
SUM(sum_timer_wait) total_latency,
MIN(min_timer_wait) min_latency,
AVG(avg_timer_wait) avg_latency,
MAX(max_timer_wait) max_latency,
thread_id,
processlist_id
FROM performance_schema.events_waits_summary_by_thread_by_event_name
LEFT JOIN performance_schema.threads USING (thread_id)
WHERE event_name LIKE 'wait/io/file/%'
AND sum_timer_wait > 0
GROUP BY thread_id
ORDER BY SUM(sum_timer_wait) DESC;