-- 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: io_global_by_file_by_latency -- -- Shows the top global IO consumers by latency by file. -- -- mysql> select * from io_global_by_file_by_latency limit 5; -- +-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+ -- | file | total | total_latency | count_read | read_latency | count_write | write_latency | count_misc | misc_latency | -- +-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+ -- | @@datadir/sys/wait_classes_global_by_avg_latency_raw.frm~ | 24 | 451.99 ms | 0 | 0 ps | 4 | 108.07 us | 20 | 451.88 ms | -- | @@datadir/sys/innodb_buffer_stats_by_schema_raw.frm~ | 24 | 379.84 ms | 0 | 0 ps | 4 | 108.88 us | 20 | 379.73 ms | -- | @@datadir/sys/io_by_thread_by_latency_raw.frm~ | 24 | 379.46 ms | 0 | 0 ps | 4 | 101.37 us | 20 | 379.36 ms | -- | @@datadir/ibtmp1 | 53 | 373.45 ms | 0 | 0 ps | 48 | 246.08 ms | 5 | 127.37 ms | -- | @@datadir/sys/statement_analysis_raw.frm~ | 24 | 353.14 ms | 0 | 0 ps | 4 | 94.96 us | 20 | 353.04 ms | -- +-----------------------------------------------------------+-------+---------------+------------+--------------+-------------+---------------+------------+--------------+ -- CREATE OR REPLACE ALGORITHM = MERGE DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW io_global_by_file_by_latency ( file, total, total_latency, count_read, read_latency, count_write, write_latency, count_misc, misc_latency ) AS SELECT sys.format_path(file_name) AS file, count_star AS total, sys.format_time(sum_timer_wait) AS total_latency, count_read, sys.format_time(sum_timer_read) AS read_latency, count_write, sys.format_time(sum_timer_write) AS write_latency, count_misc, sys.format_time(sum_timer_misc) AS misc_latency FROM performance_schema.file_summary_by_instance ORDER BY sum_timer_wait DESC;