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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: latest_file_io
--
-- Shows the latest file IO, by file / thread.
--
-- mysql> select * from latest_file_io limit 5;
-- +----------------------+----------------------------------------+------------+-----------+-----------+
-- | thread | file | latency | operation | requested |
-- +----------------------+----------------------------------------+------------+-----------+-----------+
-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 9.26 us | write | 124 bytes |
-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 4.00 us | write | 2 bytes |
-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 56.34 us | close | NULL |
-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYD | 53.93 us | close | NULL |
-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 104.05 ms | delete | NULL |
-- +----------------------+----------------------------------------+------------+-----------+-----------+
--
CREATE OR REPLACE
ALGORITHM = MERGE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW 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,
sys.format_path(object_name) file,
format_pico_time(timer_wait) AS latency,
operation,
format_bytes(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;
|
