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ps_statement_avg_latency_histogram()
xiaoboluo768 edited this page Jun 9, 2020
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3 revisions
-
显示跟踪performance_schema.events_statements_summary_by_diges表中所有经过标准化格式转换的语句执行平均延迟时间的文本直方图，代表语句平均执行时间分布，通过查询sys.x$ps_digest_avg_latency_distribution视图进行一些数据处理实现
- 该存储过程执行时无需任何传入参数
-
定义语句
DROP PROCEDURE IF EXISTS ps_statement_avg_latency_histogram;
DELIMITER $$
CREATE DEFINER='root'@'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 ;
- 示例
admin@localhost : sys 12:45:44> call ps_statement_avg_latency_histogram();
| Performance Schema Statement Digest Average Latency Histogram
# 注意，. = 1 unit的意思是一个点号字符代表一个单位，即一个语句（但并不代表次数，如下输出信息中，时间段分布之后紧贴的数字代表语句执行次数），*和#字符串含义以此类推
. = 1 unit
* = 2 units
# = 3 units
(0 - 2ms) 17 | ......
(2 - 3ms) 4 | ....
(3 - 5ms) 3 | ...
(5 - 6ms) 1 | .
(6 - 8ms) 0 |
(8 - 10ms) 0 |
(10 - 11ms) 0 |
(11 - 13ms) 0 |
(13 - 15ms) 0 |
(15 - 16ms) 0 |
(16 - 18ms) 0 |
(18 - 19ms) 0 |
(19 - 21ms) 0 |
(21 - 23ms) 0 |
(23 - 24ms) 0 |
(24 - 26ms) 0 |
Total Statements: 26; Buckets: 16; Bucket Size: 2 ms;
1 row in set (0.02 sec)
Query OK, 0 rows affected (0.02 sec)
上一篇： ps_setup_show_enabled_instruments()存储过程 | 下一篇： ps_trace_statement_digest()存储过程
- 验证、测试、整理：罗小波
- QQ：309969177
- 提示：本系列文章的主体结构遵循Oracle MySQL 官方 5.7 手册中，关于information_schema、mysql schema、performance_schema、sys schema的章节结构体系，并额外添加了一些验证、测试数据。鉴于本人精力和能力有限，难免出现一些纰漏，欢迎大家踊跃指正！