-- 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: x$schema_index_statistics -- -- Statistics around indexes. -- -- Ordered by the total wait time descending - top indexes are most contended. -- -- mysql> SELECT * FROM x$schema_index_statistics LIMIT 5; -- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ -- | table_schema | table_name | index_name | rows_selected | select_latency | rows_inserted | insert_latency | rows_updated | update_latency | rows_deleted | delete_latency | -- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ -- | common_schema | _global_sql_tokens | PRIMARY | 1886 | 1129676730 | 0 | 0 | 0 | 0 | 1878 | 0 | -- | common_schema | _script_statements | PRIMARY | 4606 | 4212160680 | 0 | 0 | 0 | 0 | 0 | 0 | -- | common_schema | _global_qs_variables | declaration_depth | 256 | 1650193090 | 0 | 0 | 32 | 1372148050 | 0 | 0 | -- | common_schema | _global_qs_variables | PRIMARY | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 0 | -- | common_schema | metadata | PRIMARY | 5 | 76730810 | 0 | 0 | 4 | 114310170 | 0 | 0 | -- +---------------+----------------------+-------------------+---------------+----------------+---------------+----------------+--------------+----------------+--------------+----------------+ -- CREATE OR REPLACE ALGORITHM = MERGE DEFINER = 'root'@'localhost' SQL SECURITY INVOKER VIEW x$schema_index_statistics ( table_schema, table_name, index_name, rows_selected, select_latency, rows_inserted, insert_latency, rows_updated, update_latency, rows_deleted, delete_latency ) AS SELECT OBJECT_SCHEMA AS table_schema, OBJECT_NAME AS table_name, INDEX_NAME as index_name, COUNT_FETCH AS rows_selected, SUM_TIMER_FETCH AS select_latency, COUNT_INSERT AS rows_inserted, SUM_TIMER_INSERT AS insert_latency, COUNT_UPDATE AS rows_updated, SUM_TIMER_UPDATE AS update_latency, COUNT_DELETE AS rows_deleted, SUM_TIMER_INSERT AS delete_latency FROM performance_schema.table_io_waits_summary_by_index_usage WHERE index_name IS NOT NULL ORDER BY sum_timer_wait DESC;