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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: statements_with_runtimes_in_95th_percentile
--
-- List all statements whose average runtime, in microseconds, is in the top 95th percentile.
--
-- mysql> select * from statements_with_runtimes_in_95th_percentile limit 5;
-- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
-- | query | db | full_scan | exec_count | err_count | warn_count | total_latency | max_latency | avg_latency | rows_sent | rows_sent_avg | rows_examined | rows_examined_avg | FIRST_SEEN | LAST_SEEN | digest |
-- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
-- | SELECT `e` . `round_robin_bin` ... `timestamp` = `maxes` . `ts` | mem | * | 14 | 0 | 0 | 43.96 s | 6.69 s | 3.14 s | 11 | 1 | 253170 | 18084 | 2013-12-04 20:05:01 | 2013-12-04 20:06:34 | 29ba002bf039bb6439357a10134407de |
-- | SELECT `e` . `round_robin_bin` ... `timestamp` = `maxes` . `ts` | mem | * | 8 | 0 | 0 | 17.89 s | 4.12 s | 2.24 s | 7 | 1 | 169534 | 21192 | 2013-12-04 20:04:54 | 2013-12-04 20:05:05 | 0b1c1f91e7e9e0ff91aa49d15f540793 |
-- | SELECT `e` . `round_robin_bin` ... `timestamp` = `maxes` . `ts` | mem | * | 1 | 0 | 0 | 2.22 s | 2.22 s | 2.22 s | 1 | 1 | 40322 | 40322 | 2013-12-04 20:05:39 | 2013-12-04 20:05:39 | 07b27145c8f8a3779737df5032374833 |
-- | SELECT `e` . `round_robin_bin` ... `timestamp` = `maxes` . `ts` | mem | * | 1 | 0 | 0 | 1.97 s | 1.97 s | 1.97 s | 1 | 1 | 40322 | 40322 | 2013-12-04 20:05:39 | 2013-12-04 20:05:39 | a07488137ea5c1bccf3e291c50bfd21f |
-- | SELECT `e` . `round_robin_bin` ... `timestamp` = `maxes` . `ts` | mem | * | 2 | 0 | 0 | 3.91 s | 3.91 s | 1.96 s | 1 | 1 | 13126 | 6563 | 2013-12-04 20:05:04 | 2013-12-04 20:06:34 | b8bddc6566366dafc7e474f67096a93b |
-- +-------------------------------------------------------------------+------+-----------+------------+-----------+------------+---------------+-------------+-------------+-----------+---------------+---------------+-------------------+---------------------+---------------------+----------------------------------+
--
CREATE OR REPLACE
ALGORITHM = MERGE
DEFINER = 'mariadb.sys'@'localhost'
SQL SECURITY INVOKER
VIEW statements_with_runtimes_in_95th_percentile (
query,
db,
full_scan,
exec_count,
err_count,
warn_count,
total_latency,
max_latency,
avg_latency,
rows_sent,
rows_sent_avg,
rows_examined,
rows_examined_avg,
first_seen,
last_seen,
digest
) AS
SELECT sys.format_statement(DIGEST_TEXT) AS query,
SCHEMA_NAME as db,
IF(SUM_NO_GOOD_INDEX_USED > 0 OR SUM_NO_INDEX_USED > 0, '*', '') AS full_scan,
COUNT_STAR AS exec_count,
SUM_ERRORS AS err_count,
SUM_WARNINGS AS warn_count,
sys.format_time(SUM_TIMER_WAIT) AS total_latency,
sys.format_time(MAX_TIMER_WAIT) AS max_latency,
sys.format_time(AVG_TIMER_WAIT) AS avg_latency,
SUM_ROWS_SENT AS rows_sent,
ROUND(IFNULL(SUM_ROWS_SENT / NULLIF(COUNT_STAR, 0), 0)) AS rows_sent_avg,
SUM_ROWS_EXAMINED AS rows_examined,
ROUND(IFNULL(SUM_ROWS_EXAMINED / NULLIF(COUNT_STAR, 0), 0)) AS rows_examined_avg,
FIRST_SEEN AS first_seen,
LAST_SEEN AS last_seen,
DIGEST AS digest
FROM performance_schema.events_statements_summary_by_digest stmts
JOIN sys.x$ps_digest_95th_percentile_by_avg_us AS top_percentile
ON ROUND(stmts.avg_timer_wait/1000000) >= top_percentile.avg_us
ORDER BY AVG_TIMER_WAIT DESC;
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