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-- Copyright (c) 2014, 2015, 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: x$waits_global_by_latency
--
-- Lists the top wait events by their total latency, ignoring idle (this may be very large).
--
-- mysql> select * from x$waits_global_by_latency limit 5;
-- +--------------------------------------+-------+---------------+-------------+--------------+
-- | event | total | total_latency | avg_latency | max_latency |
-- +--------------------------------------+-------+---------------+-------------+--------------+
-- | wait/io/file/sql/file_parser | 679 | 3536136351540 | 5207858773 | 129860439800 |
-- | wait/io/file/innodb/innodb_data_file | 195 | 848170566100 | 4349592637 | 350700491310 |
-- | wait/io/file/sql/FRM | 1355 | 400428476500 | 295518990 | 44823120940 |
-- | wait/io/file/innodb/innodb_log_file | 20 | 54298899070 | 2714944765 | 30108124800 |
-- | wait/io/file/mysys/charset | 3 | 24244722970 | 8081574072 | 24151547420 |
-- +--------------------------------------+-------+---------------+-------------+--------------+
--
CREATE OR REPLACE
ALGORITHM = MERGE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW x$waits_global_by_latency (
events,
total,
total_latency,
avg_latency,
max_latency
) AS
SELECT event_name AS event,
count_star AS total,
sum_timer_wait AS total_latency,
avg_timer_wait AS avg_latency,
max_timer_wait AS max_latency
FROM performance_schema.events_waits_summary_global_by_event_name
WHERE event_name != 'idle'
AND sum_timer_wait > 0
ORDER BY sum_timer_wait DESC;
|
