-- 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$user_summary_by_file_io -- -- Summarizes file IO totals per user. -- -- When the user found is NULL, it is assumed to be a "background" thread. -- -- mysql> select * from x$user_summary_by_file_io; -- +------------+-------+----------------+ -- | user | ios | io_latency | -- +------------+-------+----------------+ -- | root | 26457 | 21579585586390 | -- | background | 1189 | 394212617370 | -- +------------+-------+----------------+ -- CREATE OR REPLACE ALGORITHM = TEMPTABLE DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW x$user_summary_by_file_io ( user, ios, io_latency ) AS SELECT IF(user IS NULL, 'background', user) AS user, SUM(count_star) AS ios, SUM(sum_timer_wait) AS io_latency FROM performance_schema.events_waits_summary_by_user_by_event_name GROUP BY IF(user IS NULL, 'background', user) ORDER BY SUM(sum_timer_wait) DESC;