-- 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: waits_by_host_by_latency -- -- Lists the top wait events per host by their total latency, ignoring idle (this may be very large). -- -- mysql> select * from sys.x$waits_by_host_by_latency where host != 'background' limit 5; -- +-----------+------------------------------+-------+----------------+-------------+--------------+ -- | host | event | total | total_latency | avg_latency | max_latency | -- +-----------+------------------------------+-------+----------------+-------------+--------------+ -- | localhost | wait/io/file/sql/file_parser | 1388 | 14502657551590 | 10448600240 | 357364034170 | -- | localhost | wait/io/file/sql/FRM | 167 | 361060236420 | 2162037319 | 75331088170 | -- | localhost | wait/io/file/myisam/kfile | 410 | 322294755250 | 786084585 | 65978227120 | -- | localhost | wait/io/file/myisam/dfile | 1327 | 307435262550 | 231676679 | 37162925800 | -- | localhost | wait/io/file/sql/dbopt | 89 | 180341976360 | 2026314303 | 63405386850 | -- +-----------+------------------------------+-------+----------------+-------------+--------------+ -- CREATE OR REPLACE ALGORITHM = MERGE DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW x$waits_by_host_by_latency ( host, event, total, total_latency, avg_latency, max_latency ) AS SELECT IF(host IS NULL, 'background', host) AS host, 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_by_host_by_event_name WHERE event_name != 'idle' AND sum_timer_wait > 0 ORDER BY host, sum_timer_wait DESC;