1-- Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved. 2-- 3-- This program is free software; you can redistribute it and/or modify 4-- it under the terms of the GNU General Public License as published by 5-- the Free Software Foundation; version 2 of the License. 6-- 7-- This program is distributed in the hope that it will be useful, 8-- but WITHOUT ANY WARRANTY; without even the implied warranty of 9-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10-- GNU General Public License for more details. 11-- 12-- You should have received a copy of the GNU General Public License 13-- along with this program; if not, write to the Free Software 14-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 15 16-- 17-- View: x$schema_index_statistics 18-- 19-- Statistics around indexes. 20-- 21-- Ordered by the total wait time descending - top indexes are most contended. 22-- 23-- mysql> SELECT * FROM x$schema_index_statistics LIMIT 5; 24-- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ 25-- | table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency | 26-- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ 27-- | common_schema | _global_sql_tokens | PRIMARY | 1886 | 1129676730 | 0 | 0 | 0 | 0 | 1878 | 0 | 28-- | common_schema | _script_statements | PRIMARY | 4606 | 4212160680 | 0 | 0 | 0 | 0 | 0 | 0 | 29-- | common_schema | _global_qs_variables | declaration_depth | 256 | 1650193090 | 0 | 0 | 32 | 1372148050 | 0 | 0 | 30-- | common_schema | _global_qs_variables | PRIMARY | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | 31-- | common_schema | metadata | PRIMARY | 5 | 76730810 | 0 | 0 | 4 | 114310170 | 0 | 0 | 32-- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ 33-- 34 35CREATE OR REPLACE 36 ALGORITHM = MERGE 37 DEFINER = 'root'@'localhost' 38 SQL SECURITY INVOKER 39VIEW x$schema_index_statistics ( 40 table_schema, 41 table_name, 42 index_name, 43 rows_selected, 44 select_latency, 45 rows_inserted, 46 insert_latency, 47 rows_updated, 48 update_latency, 49 rows_deleted, 50 delete_latency 51) AS 52SELECT OBJECT_SCHEMA AS table_schema, 53 OBJECT_NAME AS table_name, 54 INDEX_NAME as index_name, 55 COUNT_FETCH AS rows_selected, 56 SUM_TIMER_FETCH AS select_latency, 57 COUNT_INSERT AS rows_inserted, 58 SUM_TIMER_INSERT AS insert_latency, 59 COUNT_UPDATE AS rows_updated, 60 SUM_TIMER_UPDATE AS update_latency, 61 COUNT_DELETE AS rows_deleted, 62 SUM_TIMER_INSERT AS delete_latency 63 FROM performance_schema.table_io_waits_summary_by_index_usage 64 WHERE index_name IS NOT NULL 65 ORDER BY sum_timer_wait DESC; 66