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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$latest_file_io
--
-- Shows the latest file IO, by file / thread.
--
-- mysql> SELECT * FROM x$latest_file_io LIMIT 5;
-- +------------------+------------------------------------------------------------------------------------+-------------+-----------+-----------+
-- | thread | file | latency | operation | requested |
-- +------------------+------------------------------------------------------------------------------------+-------------+-----------+-----------+
-- | root@localhost:6 | /Users/mark/sandboxes/msb_5_7_2/data/ps_helper/user_summary_by_statement_type.frm~ | 26152490 | write | 4210 |
-- | root@localhost:6 | /Users/mark/sandboxes/msb_5_7_2/data/ps_helper/user_summary_by_statement_type.frm~ | 30062722690 | sync | NULL |
-- | root@localhost:6 | /Users/mark/sandboxes/msb_5_7_2/data/ps_helper/user_summary_by_statement_type.frm~ | 34144890 | close | NULL |
-- | root@localhost:6 | /Users/mark/sandboxes/msb_5_7_2/data/ps_helper/check_lost_instrumentation.frm | 113001980 | open | NULL |
-- | root@localhost:6 | /Users/mark/sandboxes/msb_5_7_2/data/ps_helper/check_lost_instrumentation.frm | 9553180 | read | 10 |
-- +------------------+------------------------------------------------------------------------------------+-------------+-----------+-----------+
--
CREATE OR REPLACE
ALGORITHM = MERGE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW x$latest_file_io (
thread,
file,
latency,
operation,
requested
) AS
SELECT IF(id IS NULL,
CONCAT(SUBSTRING_INDEX(name, '/', -1), ':', thread_id),
CONCAT(user, '@', host, ':', id)
) thread,
object_name file,
timer_wait AS latency,
operation,
number_of_bytes AS requested
FROM performance_schema.events_waits_history_long
JOIN performance_schema.threads USING (thread_id)
LEFT JOIN information_schema.processlist ON processlist_id = id
WHERE object_name IS NOT NULL
AND event_name LIKE 'wait/io/file/%'
ORDER BY timer_start;
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