58 lines
2.5 KiB
SQL
58 lines
2.5 KiB
SQL
-- Copyright (c) 2014, 2019, Oracle and/or its affiliates. All rights reserved.
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; version 2 of the License.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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--
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-- View: latest_file_io
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--
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-- Shows the latest file IO, by file / thread.
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--
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-- mysql> select * from latest_file_io limit 5;
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-- +----------------------+----------------------------------------+------------+-----------+-----------+
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-- | thread | file | latency | operation | requested |
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-- +----------------------+----------------------------------------+------------+-----------+-----------+
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-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 9.26 us | write | 124 bytes |
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-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 4.00 us | write | 2 bytes |
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-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 56.34 us | close | NULL |
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-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYD | 53.93 us | close | NULL |
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-- | msandbox@localhost:1 | @@tmpdir/#sqlcf28_1_4e.MYI | 104.05 ms | delete | NULL |
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-- +----------------------+----------------------------------------+------------+-----------+-----------+
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--
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CREATE OR REPLACE
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ALGORITHM = MERGE
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DEFINER = 'mysql.sys'@'localhost'
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SQL SECURITY INVOKER
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VIEW latest_file_io (
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thread,
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file,
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latency,
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operation,
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requested
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) AS
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SELECT IF(id IS NULL,
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CONCAT(SUBSTRING_INDEX(name, '/', -1), ':', thread_id),
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CONCAT(user, '@', host, ':', id)
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) thread,
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sys.format_path(object_name) file,
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sys.format_time(timer_wait) AS latency,
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operation,
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sys.format_bytes(number_of_bytes) AS requested
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FROM performance_schema.events_waits_history_long
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JOIN performance_schema.threads USING (thread_id)
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LEFT JOIN information_schema.processlist ON processlist_id = id
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WHERE object_name IS NOT NULL
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AND event_name LIKE 'wait/io/file/%'
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ORDER BY timer_start;
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