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mariadb/scripts/sys_schema/procedures/ps_statement_avg_latency_histogram.sql

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SQL
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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
DROP PROCEDURE IF EXISTS ps_statement_avg_latency_histogram;
DELIMITER $$
CREATE DEFINER='mariadb.sys'@'localhost' PROCEDURE ps_statement_avg_latency_histogram ()
COMMENT '
Description
-----------
Outputs a textual histogram graph of the average latency values
across all normalized queries tracked within the Performance Schema
events_statements_summary_by_digest table.
Can be used to show a very high level picture of what kind of
latency distribution statements running within this instance have.
Parameters
-----------
None.
Example
-----------
mysql> CALL sys.ps_statement_avg_latency_histogram()\\G
*************************** 1. row ***************************
Performance Schema Statement Digest Average Latency Histogram:
. = 1 unit
* = 2 units
# = 3 units
(0 - 38ms) 240 | ################################################################################
(38 - 77ms) 38 | ......................................
(77 - 115ms) 3 | ...
(115 - 154ms) 62 | *******************************
(154 - 192ms) 3 | ...
(192 - 231ms) 0 |
(231 - 269ms) 0 |
(269 - 307ms) 0 |
(307 - 346ms) 0 |
(346 - 384ms) 1 | .
(384 - 423ms) 1 | .
(423 - 461ms) 0 |
(461 - 499ms) 0 |
(499 - 538ms) 0 |
(538 - 576ms) 0 |
(576 - 615ms) 1 | .
Total Statements: 350; Buckets: 16; Bucket Size: 38 ms;
'
SQL SECURITY INVOKER
NOT DETERMINISTIC
READS SQL DATA
BEGIN
SELECT CONCAT('\n',
'\n . = 1 unit',
'\n * = 2 units',
'\n # = 3 units\n',
@label := CONCAT(@label_inner := CONCAT('\n(0 - ',
ROUND((@bucket_size := (SELECT ROUND((MAX(avg_us) - MIN(avg_us)) / (@buckets := 16)) AS size
FROM sys.x$ps_digest_avg_latency_distribution)) / (@unit_div := 1000)),
(@unit := 'ms'), ')'),
REPEAT(' ', (@max_label_size := ((1 + LENGTH(ROUND((@bucket_size * 15) / @unit_div)) + 3 + LENGTH(ROUND(@bucket_size * 16) / @unit_div)) + 1)) - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us <= @bucket_size), 0)),
REPEAT(' ', (@max_label_len := (@max_label_size + LENGTH((@total_queries := (SELECT SUM(cnt) FROM sys.x$ps_digest_avg_latency_distribution)))) + 1) - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < (@one_unit := 40), '.', IF(@count_in_bucket < (@two_unit := 80), '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND(@bucket_size / @unit_div), ' - ', ROUND((@bucket_size * 2) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size AND b1.avg_us <= @bucket_size * 2), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 2) / @unit_div), ' - ', ROUND((@bucket_size * 3) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 2 AND b1.avg_us <= @bucket_size * 3), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 3) / @unit_div), ' - ', ROUND((@bucket_size * 4) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 3 AND b1.avg_us <= @bucket_size * 4), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 4) / @unit_div), ' - ', ROUND((@bucket_size * 5) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 4 AND b1.avg_us <= @bucket_size * 5), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 5) / @unit_div), ' - ', ROUND((@bucket_size * 6) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 5 AND b1.avg_us <= @bucket_size * 6), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 6) / @unit_div), ' - ', ROUND((@bucket_size * 7) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 6 AND b1.avg_us <= @bucket_size * 7), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 7) / @unit_div), ' - ', ROUND((@bucket_size * 8) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 7 AND b1.avg_us <= @bucket_size * 8), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 8) / @unit_div), ' - ', ROUND((@bucket_size * 9) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 8 AND b1.avg_us <= @bucket_size * 9), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 9) / @unit_div), ' - ', ROUND((@bucket_size * 10) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 9 AND b1.avg_us <= @bucket_size * 10), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 10) / @unit_div), ' - ', ROUND((@bucket_size * 11) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 10 AND b1.avg_us <= @bucket_size * 11), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 11) / @unit_div), ' - ', ROUND((@bucket_size * 12) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 11 AND b1.avg_us <= @bucket_size * 12), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 12) / @unit_div), ' - ', ROUND((@bucket_size * 13) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 12 AND b1.avg_us <= @bucket_size * 13), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 13) / @unit_div), ' - ', ROUND((@bucket_size * 14) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 13 AND b1.avg_us <= @bucket_size * 14), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 14) / @unit_div), ' - ', ROUND((@bucket_size * 15) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 14 AND b1.avg_us <= @bucket_size * 15), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
@label := CONCAT(@label_inner := CONCAT('\n(', ROUND((@bucket_size * 15) / @unit_div), ' - ', ROUND((@bucket_size * 16) / @unit_div), @unit, ')'),
REPEAT(' ', @max_label_size - LENGTH(@label_inner)),
@count_in_bucket := IFNULL((SELECT SUM(cnt)
FROM sys.x$ps_digest_avg_latency_distribution AS b1
WHERE b1.avg_us > @bucket_size * 15 AND b1.avg_us <= @bucket_size * 16), 0)),
REPEAT(' ', @max_label_len - LENGTH(@label)), '| ',
IFNULL(REPEAT(IF(@count_in_bucket < @one_unit, '.', IF(@count_in_bucket < @two_unit, '*', '#')),
IF(@count_in_bucket < @one_unit, @count_in_bucket,
IF(@count_in_bucket < @two_unit, @count_in_bucket / 2, @count_in_bucket / 3))), ''),
'\n\n Total Statements: ', @total_queries, '; Buckets: ', @buckets , '; Bucket Size: ', ROUND(@bucket_size / @unit_div) , ' ', @unit, ';\n'
) AS `Performance Schema Statement Digest Average Latency Histogram`;
END $$
DELIMITER ;
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