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-- 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;
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