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-- Copyright (c) 2014, 2016, 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: innodb_buffer_stats_by_schema
--
-- Summarizes the output of the INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
-- table, aggregating by schema
--
--
-- mysql> select * from innodb_buffer_stats_by_schema;
-- +--------------------------+------------+------------+-------+--------------+-----------+-------------+
-- | object_schema | allocated | data | pages | pages_hashed | pages_old | rows_cached |
-- +--------------------------+------------+------------+-------+--------------+-----------+-------------+
-- | mem30_trunk__instruments | 1.69 MiB | 510.03 KiB | 108 | 108 | 108 | 3885 |
-- | InnoDB System | 688.00 KiB | 351.62 KiB | 43 | 43 | 43 | 862 |
-- | mem30_trunk__events | 80.00 KiB | 21.61 KiB | 5 | 5 | 5 | 229 |
-- +--------------------------+------------+------------+-------+--------------+-----------+-------------+
--
DELIMITER $$
BEGIN NOT ATOMIC
DECLARE EXIT HANDLER FOR SQLEXCEPTION
BEGIN
END;
CREATE OR REPLACE
ALGORITHM = TEMPTABLE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW innodb_buffer_stats_by_schema (
object_schema,
allocated,
data,
pages,
pages_hashed,
pages_old,
rows_cached
) AS
SELECT IF(LOCATE('.', ibp.table_name) = 0, 'InnoDB System', REPLACE(SUBSTRING_INDEX(ibp.table_name, '.', 1), '`', '')) AS object_schema,
format_bytes(SUM(IF(ibp.compressed_size = 0, 16384, compressed_size))) AS allocated,
format_bytes(SUM(ibp.data_size)) AS data,
COUNT(ibp.page_number) AS pages,
COUNT(IF(ibp.is_hashed = 'YES', 1, NULL)) AS pages_hashed,
COUNT(IF(ibp.is_old = 'YES', 1, NULL)) AS pages_old,
ROUND(SUM(ibp.number_records)/COUNT(DISTINCT ibp.index_name)) AS rows_cached
FROM information_schema.innodb_buffer_page ibp
WHERE table_name IS NOT NULL
GROUP BY object_schema
ORDER BY SUM(IF(ibp.compressed_size = 0, 16384, compressed_size)) DESC;
END$$
DELIMITER ;
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