Add a memory summary per thread, to use with the the processlist view in 5.7

Author: MarkLeith

views/p_s/memory_by_thread.sql

@@ -0,0 +1,112 @@
+/* Copyright (c) 2014, 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: memory_by_user_by_current_bytes
+ *
+ * Summarizes memory use by user using the 5.7 Performance Schema instrumentation.
+ * 
+ * When the user found is NULL, it is assumed to be a "background" thread.  
+ *
+ * mysql> select * from sys.memory_by_thread_by_current_bytes limit 5;
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ * | thread_id | user           | current_count_used | current_allocated | current_avg_alloc | current_max_alloc | total_allocated |
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ * |         1 | sql/main       |              29333 | 166.02 MiB        | 5.80 KiB          | 131.13 MiB        | 196.00 MiB      |
+ * |        55 | root@localhost |                175 | 1.04 MiB          | 6.09 KiB          | 350.86 KiB        | 67.37 MiB       |
+ * |        58 | root@localhost |                236 | 368.13 KiB        | 1.56 KiB          | 312.05 KiB        | 130.34 MiB      |
+ * |       904 | root@localhost |                 32 | 18.00 KiB         | 576 bytes         | 16.00 KiB         | 6.68 MiB        |
+ * |       970 | root@localhost |                 12 | 16.80 KiB         | 1.40 KiB          | 16.00 KiB         | 1.20 MiB        |
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ *
+ */
+
+CREATE OR REPLACE
+  ALGORITHM = TEMPTABLE
+  DEFINER = 'root'@'localhost'
+  SQL SECURITY INVOKER 
+VIEW memory_by_thread_by_current_bytes (
+  thread_id,
+  user,
+  current_count_used,
+  current_allocated,
+  current_avg_alloc,
+  current_max_alloc,
+  total_allocated
+) AS
+SELECT thread_id,
+       IF(t.name = 'thread/sql/one_connection', 
+          CONCAT(t.processlist_user, '@', t.processlist_host), 
+          REPLACE(t.name, 'thread/', '')) user,
+       SUM(mt.current_count_used) AS current_count_used,
+       sys.format_bytes(SUM(mt.current_number_of_bytes_used)) AS current_allocated,
+       sys.format_bytes(IFNULL(SUM(mt.current_number_of_bytes_used) / NULLIF(SUM(current_count_used), 0), 0)) AS current_avg_alloc,
+       sys.format_bytes(MAX(mt.current_number_of_bytes_used)) AS current_max_alloc,
+       sys.format_bytes(SUM(mt.sum_number_of_bytes_alloc)) AS total_allocated
+  FROM performance_schema.memory_summary_by_thread_by_event_name AS mt
+  JOIN performance_schema.threads AS t USING (thread_id)
+ GROUP BY thread_id, IF(t.name = 'thread/sql/one_connection', 
+          CONCAT(t.processlist_user, '@', t.processlist_host), 
+          REPLACE(t.name, 'thread/', ''))
+ ORDER BY SUM(current_number_of_bytes_used) DESC;
+
+/*
+ * View: x$memory_by_user_by_current_bytes
+ *
+ * Summarizes memory use by user
+ * 
+ * When the user found is NULL, it is assumed to be a "background" thread.  
+ *
+ * mysql> select * from sys.x$memory_by_thread_by_current_bytes limit 5;
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ * | thread_id | user           | current_count_used | current_allocated | current_avg_alloc | current_max_alloc | total_allocated |
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ * |         1 | sql/main       |              29333 |         174089450 |         5934.9351 |         137494528 |       205523135 |
+ * |        55 | root@localhost |                173 |           1074664 |         6211.9306 |            359280 |        72248413 |
+ * |        58 | root@localhost |                240 |            377099 |         1571.2458 |            319536 |       169483870 |
+ * |      1152 | root@localhost |                 30 |             56949 |         1898.3000 |             16391 |         1010024 |
+ * |      1154 | root@localhost |                 34 |             56369 |         1657.9118 |             16391 |         1958771 |
+ * +-----------+----------------+--------------------+-------------------+-------------------+-------------------+-----------------+
+ * 
+ */
+
+CREATE OR REPLACE
+  ALGORITHM = TEMPTABLE
+  DEFINER = 'root'@'localhost'
+  SQL SECURITY INVOKER 
+VIEW x$memory_by_thread_by_current_bytes (
+  thread_id,
+  user,
+  current_count_used,
+  current_allocated,
+  current_avg_alloc,
+  current_max_alloc,
+  total_allocated
+) AS
+SELECT t.thread_id,
+       IF(t.name = 'thread/sql/one_connection', 
+          CONCAT(t.processlist_user, '@', t.processlist_host), 
+          REPLACE(t.name, 'thread/', '')) user,
+       SUM(mt.current_count_used) AS current_count_used,
+       SUM(mt.current_number_of_bytes_used) AS current_allocated,
+       IFNULL(SUM(mt.current_number_of_bytes_used) / NULLIF(SUM(current_count_used), 0), 0) AS current_avg_alloc,
+       MAX(mt.current_number_of_bytes_used) AS current_max_alloc,
+       SUM(mt.sum_number_of_bytes_alloc) AS total_allocated
+  FROM performance_schema.memory_summary_by_thread_by_event_name AS mt
+  JOIN performance_schema.threads AS t USING (thread_id)
+ GROUP BY thread_id, IF(t.name = 'thread/sql/one_connection', 
+          CONCAT(t.processlist_user, '@', t.processlist_host), 
+          REPLACE(t.name, 'thread/', ''))
+ ORDER BY SUM(mt.current_number_of_bytes_used) DESC;