-- Copyright (c) 2014, 2021, Oracle and/or its affiliates.
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License, version 2.0,
-- as published by the Free Software Foundation.
--
-- This program is also distributed with certain software (including
-- but not limited to OpenSSL) that is licensed under separate terms,
-- as designated in a particular file or component or in included license
-- documentation.  The authors of MySQL hereby grant you an additional
-- permission to link the program and your derivative works with the
-- separately licensed software that they have included with MySQL.
--
-- 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, version 2.0, 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$memory_global_by_current_bytes
-- 
-- Shows the current memory usage within the server globally broken down by allocation type.
--
-- mysql> select * from x$memory_global_by_current_bytes;
-- +-------------------------------------------------+---------------+---------------+-------------------+------------+------------+----------------+
-- | event_name                                      | current_count | current_alloc | current_avg_alloc | high_count | high_alloc | high_avg_alloc |
-- +-------------------------------------------------+---------------+---------------+-------------------+------------+------------+----------------+
-- | memory/performance_schema/internal_buffers      |            62 |     308073712 |      4968930.8387 |         62 |  308073712 |   4968930.8387 |
-- | memory/innodb/buf_buf_pool                      |             1 |     137428992 |    137428992.0000 |          1 |  137428992 | 137428992.0000 |
-- | memory/innodb/log0log                           |             9 |       8397152 |       933016.8889 |          9 |    8397152 |    933016.8889 |
-- | memory/mysys/KEY_CACHE                          |             3 |       8390792 |      2796930.6667 |          3 |    8390792 |   2796930.6667 |
-- | memory/innodb/hash0hash                         |            27 |       4962992 |       183814.5185 |         27 |    7173904 |    265700.1481 |
-- | memory/innodb/os0event                          |         24998 |       4199664 |          168.0000 |      24998 |    4199664 |       168.0000 |
-- ...
--

CREATE OR REPLACE
  ALGORITHM = MERGE
  DEFINER = 'mysql.sys'@'localhost'
  SQL SECURITY INVOKER 
VIEW x$memory_global_by_current_bytes (
  event_name,
  current_count,
  current_alloc,
  current_avg_alloc,
  high_count,
  high_alloc,
  high_avg_alloc
) AS
SELECT event_name,
       current_count_used AS current_count,
       current_number_of_bytes_used AS current_alloc,
       IFNULL(current_number_of_bytes_used / NULLIF(current_count_used, 0), 0) AS current_avg_alloc,
       high_count_used AS high_count,
       high_number_of_bytes_used AS high_alloc,
       IFNULL(high_number_of_bytes_used / NULLIF(high_count_used, 0), 0) AS high_avg_alloc
  FROM performance_schema.memory_summary_global_by_event_name
 WHERE current_number_of_bytes_used > 0
 ORDER BY current_number_of_bytes_used DESC;
