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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: host_summary
--
-- Summarizes statement activity, file IO and connections by host.
--
-- When the host found is NULL, it is assumed to be a "background" thread.
--
-- mysql> select * from host_summary;
-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
-- | host | statements | statement_latency | statement_avg_latency | table_scans | file_ios | file_io_latency | current_connections | total_connections | unique_users |
-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
-- | hal1 | 2924 | 00:03:59.53 | 81.92 ms | 82 | 54702 | 55.61 s | 1 | 1 | 1 |
-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
--
CREATE OR REPLACE
ALGORITHM = TEMPTABLE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW host_summary (
host,
statements,
statement_latency,
statement_avg_latency,
table_scans,
file_ios,
file_io_latency,
current_connections,
total_connections,
unique_users
) AS
SELECT IF(accounts.host IS NULL, 'background', accounts.host) AS host,
SUM(stmt.total) AS statements,
format_pico_time(SUM(stmt.total_latency)) AS statement_latency,
format_pico_time(IFNULL(SUM(stmt.total_latency) / NULLIF(SUM(stmt.total), 0), 0)) AS statement_avg_latency,
SUM(stmt.full_scans) AS table_scans,
SUM(io.ios) AS file_ios,
format_pico_time(SUM(io.io_latency)) AS file_io_latency,
SUM(accounts.current_connections) AS current_connections,
SUM(accounts.total_connections) AS total_connections,
COUNT(DISTINCT accounts.user) AS unique_users
FROM performance_schema.accounts
LEFT JOIN sys.x$host_summary_by_statement_latency AS stmt ON accounts.host = stmt.host
LEFT JOIN sys.x$host_summary_by_file_io AS io ON accounts.host = io.host
GROUP BY IF(accounts.host IS NULL, 'background', accounts.host);
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