66 lines
3.4 KiB
SQL
66 lines
3.4 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: schema_index_statistics
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--
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-- Statistics around indexes.
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--
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-- Ordered by the total wait time descending - top indexes are most contended.
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--
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-- mysql> select * from schema_index_statistics limit 5;
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-- +------------------+-------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
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-- | table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency |
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-- +------------------+-------------+------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+
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-- | mem | mysqlserver | PRIMARY | 6208 | 108.27 ms | 0 | 0 ps | 5470 | 1.47 s | 0 | 0 ps |
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-- | mem | innodb | PRIMARY | 4666 | 76.27 ms | 0 | 0 ps | 4454 | 571.47 ms | 0 | 0 ps |
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-- | mem | connection | PRIMARY | 1064 | 20.98 ms | 0 | 0 ps | 1064 | 457.30 ms | 0 | 0 ps |
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-- | mem | environment | PRIMARY | 5566 | 151.17 ms | 0 | 0 ps | 694 | 252.57 ms | 0 | 0 ps |
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-- | mem | querycache | PRIMARY | 1698 | 27.99 ms | 0 | 0 ps | 1698 | 371.72 ms | 0 | 0 ps |
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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 schema_index_statistics (
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table_schema,
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table_name,
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index_name,
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rows_selected,
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select_latency,
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rows_inserted,
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insert_latency,
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rows_updated,
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update_latency,
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rows_deleted,
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delete_latency
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) AS
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SELECT OBJECT_SCHEMA AS table_schema,
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OBJECT_NAME AS table_name,
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INDEX_NAME as index_name,
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COUNT_FETCH AS rows_selected,
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sys.format_time(SUM_TIMER_FETCH) AS select_latency,
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COUNT_INSERT AS rows_inserted,
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sys.format_time(SUM_TIMER_INSERT) AS insert_latency,
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COUNT_UPDATE AS rows_updated,
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sys.format_time(SUM_TIMER_UPDATE) AS update_latency,
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COUNT_DELETE AS rows_deleted,
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sys.format_time(SUM_TIMER_DELETE) AS delete_latency
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FROM performance_schema.table_io_waits_summary_by_index_usage
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WHERE index_name IS NOT NULL
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ORDER BY sum_timer_wait DESC;
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