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c2b6916393
* it isn't "pfs" function, don't call it Item_func_pfs, don't use item_pfsfunc.* * tests don't depend on performance schema, put in the main suite * inherit from Item_str_ascii_func * use connection collation, not utf8mb3_general_ci * set result length in fix_length_and_dec * do not set maybe_null * use my_snprintf() where possible * don't set m_value.ptr on every invocation * update sys schema to use the format_pico_time() * len must be size_t (compilation error on Windows) * the correct function name for double->double is fabs() * drop volatile hack
60 lines
2.9 KiB
SQL
60 lines
2.9 KiB
SQL
-- Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; version 2 of the License.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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--
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-- View: host_summary
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--
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-- Summarizes statement activity, file IO and connections by host.
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--
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-- When the host found is NULL, it is assumed to be a "background" thread.
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--
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-- mysql> select * from host_summary;
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-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
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-- | host | statements | statement_latency | statement_avg_latency | table_scans | file_ios | file_io_latency | current_connections | total_connections | unique_users |
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-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
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-- | hal1 | 2924 | 00:03:59.53 | 81.92 ms | 82 | 54702 | 55.61 s | 1 | 1 | 1 |
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-- +------+------------+-------------------+-----------------------+-------------+----------+-----------------+---------------------+-------------------+--------------+
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--
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CREATE OR REPLACE
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ALGORITHM = TEMPTABLE
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DEFINER = 'mariadb.sys'@'localhost'
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SQL SECURITY INVOKER
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VIEW host_summary (
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host,
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statements,
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statement_latency,
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statement_avg_latency,
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table_scans,
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file_ios,
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file_io_latency,
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current_connections,
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total_connections,
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unique_users
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) AS
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SELECT IF(accounts.host IS NULL, 'background', accounts.host) AS host,
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SUM(stmt.total) AS statements,
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format_pico_time(SUM(stmt.total_latency)) AS statement_latency,
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format_pico_time(IFNULL(SUM(stmt.total_latency) / NULLIF(SUM(stmt.total), 0), 0)) AS statement_avg_latency,
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SUM(stmt.full_scans) AS table_scans,
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SUM(io.ios) AS file_ios,
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format_pico_time(SUM(io.io_latency)) AS file_io_latency,
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SUM(accounts.current_connections) AS current_connections,
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SUM(accounts.total_connections) AS total_connections,
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COUNT(DISTINCT accounts.user) AS unique_users
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FROM performance_schema.accounts
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LEFT JOIN sys.x$host_summary_by_statement_latency AS stmt ON accounts.host = stmt.host
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LEFT JOIN sys.x$host_summary_by_file_io AS io ON accounts.host = io.host
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GROUP BY IF(accounts.host IS NULL, 'background', accounts.host);
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