percona-toolkit 之 【pt-query-digest】使用
背景
关于pt-query-digest的使用场景和方法在percona-toolkit 之 【pt-query-digest】介绍文章里已经做了详细说明，现在开始介绍下如何使用，以及常用的命令。
使用场景
在上一篇percona-toolkit 之 【pt-query-digest】介绍文章里已经介绍了，pt-query-digest可以从logs、processlist、和tcpdump 来分析MySQL的状况，logs包括slow log、general log、binlog。也可以把分析结果输出到文件中，或则把文件写到表中。使用方法：
pt-query-digest [OPTIONS] [FILES] [DSN]
下面我们开始说明日常的一些操作方法。
一 日志类型方面
1. slow log：--type=slowlog
属性：属性=values
$VAR1 = {
Lock_time => '0.000122',
Query_time => '6.405714',
Rows_examined => '',
Rows_sent => '',
Thread_id => '',
arg => 'select user,host,sleep(0.8) from user',
bytes => 37,
cmd => 'Query',
db => 'mysql',
fingerprint => 'select user,host,sleep(?) from user',
host => '192.168.100.222',
ip => '192.168.163.132',
pos_in_log => 4779,
timestamp => '',
ts => '2020-03-02T01:14:01',
user => 'zjy'
};
分析报告分为二部分说明：
第一部分：总体概况说明
-- 分析消耗的用户CPU时间，系统CPU时间，物理内存占用大小，虚拟内存占用大小
# 190ms user time, 10ms system time, 34.25M rss, 98.80M vsz
-- 分析的当前日期
# Current date: Sun Mar 1 23:55:53 2020
-- 分析的主机名
# Hostname: test2
-- 分析的文件名
# Files: test2-slow.log
-- 分析的整体情况：语句总数量，唯一语句数量，QPS和并发数
# Overall: 8 total, 4 unique, 0.03 QPS, 0.08x concurrency ________________
-- 分析日志的时间范围
# Time range: 2020-03-01T15:49:47 to 2020-03-01T15:54:16
--属性 总计 最小 最大 平均 95% 标准 中等
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
-- 执行时间
# Exec time 21s 2s 5s 3s 5s 986ms 2s
-- 锁时间
# Lock time 16ms 190us 6ms 2ms 6ms 2ms 2ms
-- 发送到客户端的行数
# Rows sent 36 3 10 4.50 9.83 2.10 3.89
-- 扫描行数
# Rows examine 36 3 10 4.50 9.83 2.10 3.89
-- 查询的字节数
# Query size 451 30 65 56.38 62.76 13.61 62.76
/*如果在此地方想新增一些属性，可以用--filter来进行设置 比如：--filter '($event->{Row_ratio} = $event->{Rows_sent}/($event->{Rows_examined}))' ，会新增Row ratio属性*/
-- 概况统计
# Profile
-- 排名，查询指纹，总响应时间及百分比，执行次数，执行平均响应时间，响应时间Variance-to-mean的比率，查询对象
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x5C3D88030F0258F752A830BD792DF4BA 10.0392 47.7% 5 2.0078 0.00 SELECT host
# 2 0x02DFE94A93ADC62623BF2E1E98C17EC3 5.0108 23.8% 1 5.0108 0.00 SELECT host
# 3 0x6D482C964694712F6B3445151D7A429C 3.0108 14.3% 1 3.0108 0.00 SELECT x
# 4 0x8430AB741BBC096B102EDAA5ACD08366 3.0033 14.3% 1 3.0033 0.00 SELECT x
# MISC 0xMISC 2.0002 3.3% 1 2.9911 0.00 <35 ITEMS> #剩余查询的显示
第二部分：查询SQL概况说明
-- 查询的顺序号（和第一部分的Rank对应），QPS，并发，查询指纹，
# Query 1: 0.08 QPS, 0.16x concurrency, ID 0x5C3D88030F0258F752A830BD792DF4BA at byte 739
# This item is included in the report because it matches --limit.
-- 响应比率
# Scores: V/M = 0.00
-- 分析查询的时间范围
# Time range: 2020-03-01T15:53:12 to 2020-03-01T15:54:16
-- 属性，百分比，总数，最小，最大，95%，标准，中等
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
-- 次数
# Count 55 5
-- 执行时间
# Exec time 38 10s 2s 2s 2s 2s 0 2s
-- 锁时间
# Lock time 38 7ms 209us 6ms 1ms 6ms 2ms 273us
-- 发送到客户端的行数
# Rows sent 43 20 4 4 4 4 0 4
-- 扫描行数
# Rows examine 43 20 4 4 4 4 0 4
-- 查询的字节数
# Query size 63 325 65 65 65 65 0 65
-- 发送和扫描行数比值，用第一部分提到的--filter来进行设置
# Row ratio 55 5 1 1 1 1 0 1
# String:
-- 数据库
# Databases test
-- 主机
# Hosts test2
-- 查询用户
# Users root
-- 查询执行时间分布的直方图：1微妙、10微妙、100微妙、10毫秒、100毫秒，1秒，10秒以上查询的分布情况
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
-- 表信息
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'host'\G
# SHOW CREATE TABLE `test`.`host`\G
-- 执行计划信息
# EXPLAIN /*!50100 PARTITIONS*/
-- 查询SQL
select id,hostname,agent_version,sleep(0.5) from host where id <5\G #如果是非select查询：insert，delete，update，则会转换成select进行explain
使用场景：
①：分析所有的慢查询：
pt-query-digest test2-slow.log --type=slowlog
# 180ms user time, 10ms system time, 34.17M rss, 98.79M vsz
# Current date: Mon Mar 2 00:50:10 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 15 total, 4 unique, 0.01 QPS, 0.02x concurrency _______________
# Time range: 2020-03-01T15:49:47 to 2020-03-01T16:32:44
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 55s 2s 6s 4s 5s 1s 3s
# Lock time 20ms 126us 6ms 1ms 6ms 2ms 273us
# Rows sent 99 3 10 6.60 9.83 3.17 3.89
# Rows examine 99 3 10 6.60 9.83 3.17 3.89
# Query size 853 30 65 56.87 62.76 12.41 59.77 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x02DFE94A93ADC62623BF2E1E98C17EC3 35.6617 65.2% 7 5.0945 0.01 SELECT host
# 2 0x5C3D88030F0258F752A830BD792DF4BA 10.0392 18.3% 5 2.0078 0.00 SELECT host
# 3 0x6D482C964694712F6B3445151D7A429C 6.0137 11.0% 2 3.0069 0.00 SELECT x
# 4 0x8430AB741BBC096B102EDAA5ACD08366 3.0033 5.5% 1 3.0033 0.00 SELECT x # Query 1: 0.00 QPS, 0.02x concurrency, ID 0x02DFE94A93ADC62623BF2E1E98C17EC3 at byte 3120
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.01
# Time range: 2020-03-01T15:52:55 to 2020-03-01T16:31:56
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 46 7
# Exec time 65 36s 5s 6s 5s 5s 178ms 5s
# Lock time 30 6ms 126us 3ms 863us 2ms 1ms 214us
# Rows sent 70 70 10 10 10 10 0 10
# Rows examine 70 70 10 10 10 10 0 10
# Query size 50 434 62 62 62 62 0 62
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'host'\G
# SHOW CREATE TABLE `test`.`host`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,hostname,agent_version,sleep(0.5) from host limit 10\G # Query 2: 0.08 QPS, 0.16x concurrency, ID 0x5C3D88030F0258F752A830BD792DF4BA at byte 739
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-03-01T15:53:12 to 2020-03-01T15:54:16
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 33 5
# Exec time 18 10s 2s 2s 2s 2s 0 2s
# Lock time 36 7ms 209us 6ms 1ms 6ms 2ms 273us
# Rows sent 20 20 4 4 4 4 0 4
# Rows examine 20 20 4 4 4 4 0 4
# Query size 38 325 65 65 65 65 0 65
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'host'\G
# SHOW CREATE TABLE `test`.`host`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,hostname,agent_version,sleep(0.5) from host where id <5\G # Query 3: 0.00 QPS, 0.00x concurrency, ID 0x6D482C964694712F6B3445151D7A429C at byte 0
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-03-01T15:49:47 to 2020-03-01T16:32:44
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 13 2
# Exec time 10 6s 3s 3s 3s 3s 6ms 3s
# Lock time 32 6ms 301us 6ms 3ms 6ms 4ms 3ms
# Rows sent 6 6 3 3 3 3 0 3
# Rows examine 6 6 3 3 3 3 0 3
# Query size 7 60 30 30 30 30 0 30
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'x'\G
# SHOW CREATE TABLE `test`.`x`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,name,sleep(1) from x\G # Query 4: 0 QPS, 0x concurrency, ID 0x8430AB741BBC096B102EDAA5ACD08366 at byte 241
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-01T15:50:02
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 6 1
# Exec time 5 3s 3s 3s 3s 3s 0 3s
# Lock time 0 190us 190us 190us 190us 190us 0 190us
# Rows sent 3 3 3 3 3 3 0 3
# Rows examine 3 3 3 3 3 3 0 3
# Query size 3 34 34 34 34 34 0 34
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'x'\G
# SHOW CREATE TABLE `test`.`x`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,name,age,sleep(1) from x\G
②：分析指定数据库的慢查询：
pt-query-digest test2-slow.log --type=slowlog --filter '($event->{db} || "") =~ m/^mysql/i'
# 170ms user time, 20ms system time, 34.21M rss, 98.80M vsz
# Current date: Mon Mar 2 09:17:19 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 4 total, 1 unique, 0.07 QPS, 0.34x concurrency ________________
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 18s 4s 6s 5s 6s 1s 4s
# Lock time 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 32 8 8 8 8 0 8
# Rows examine 32 8 8 8 8 0 8
# Query size 148 37 37 37 37 0 37 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============== ===== ====== ====
# 1 0x1AD46E75EF3D662BDE818F1F36DC02DD 18.4270 100.0% 4 4.6067 0.24 SELECT user # Query 1: 0.07 QPS, 0.34x concurrency, ID 0x1AD46E75EF3D662BDE818F1F36DC02DD at byte 4782
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.24
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 4
# Exec time 100 18s 4s 6s 5s 6s 1s 4s
# Lock time 100 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 100 32 8 8 8 8 0 8
# Rows examine 100 32 8 8 8 8 0 8
# Query size 100 148 37 37 37 37 0 37
# String:
# Databases mysql
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
# EXPLAIN /*!50100 PARTITIONS*/
select user,host,sleep(0.8) from user\G
③：分析指定用户的慢查询：
pt-query-digest test2-slow.log --type=slowlog --filter '($event->{user} || "") =~ m/^zjy/i'
# 180ms user time, 0 system time, 34.13M rss, 98.80M vsz
# Current date: Mon Mar 2 09:20:30 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 4 total, 1 unique, 0.07 QPS, 0.34x concurrency ________________
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 18s 4s 6s 5s 6s 1s 4s
# Lock time 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 32 8 8 8 8 0 8
# Rows examine 32 8 8 8 8 0 8
# Query size 148 37 37 37 37 0 37 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============== ===== ====== ====
# 1 0x1AD46E75EF3D662BDE818F1F36DC02DD 18.4270 100.0% 4 4.6067 0.24 SELECT user # Query 1: 0.07 QPS, 0.34x concurrency, ID 0x1AD46E75EF3D662BDE818F1F36DC02DD at byte 4779
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.24
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 4
# Exec time 100 18s 4s 6s 5s 6s 1s 4s
# Lock time 100 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 100 32 8 8 8 8 0 8
# Rows examine 100 32 8 8 8 8 0 8
# Query size 100 148 37 37 37 37 0 37
# String:
# Databases mysql
# Hosts test2
# Users zjy
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
# EXPLAIN /*!50100 PARTITIONS*/
select user,host,sleep(0.8) from user\G
④：分析指定IP的慢查询：
pt-query-digest test2-slow.log --type=slowlog --filter '($event->{host} || $event->{ip} || "") =~ m/^192.168.100.*/i'
# 170ms user time, 20ms system time, 33.98M rss, 98.67M vsz
# Current date: Mon Mar 2 09:28:51 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 1 total, 1 unique, 0 QPS, 0x concurrency ______________________
# Time range: all events occurred at 2020-03-02T01:14:01
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 6s 6s 6s 6s 6s 0 6s
# Lock time 122us 122us 122us 122us 122us 0 122us
# Rows sent 8 8 8 8 8 0 8
# Rows examine 8 8 8 8 8 0 8
# Query size 37 37 37 37 37 0 37 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x1AD46E75EF3D662BDE818F1F36DC02DD 6.4057 100.0% 1 6.4057 0.00 SELECT user # Query 1: 0 QPS, 0x concurrency, ID 0x1AD46E75EF3D662BDE818F1F36DC02DD at byte 4779
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02T01:14:01
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 1
# Exec time 100 6s 6s 6s 6s 6s 0 6s
# Lock time 100 122us 122us 122us 122us 122us 0 122us
# Rows sent 100 8 8 8 8 8 0 8
# Rows examine 100 8 8 8 8 8 0 8
# Query size 100 37 37 37 37 37 0 37
# String:
# Databases mysql
# Hosts 192.168.100.222
# Users zjy
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
# EXPLAIN /*!50100 PARTITIONS*/
select user,host,sleep(0.8) from user\G
⑤：分析指定时间范围的慢查询：
pt-query-digest test2-slow.log --type=slowlog --since='2020-03-01 15:49:47' --until='2020-03-01 15:52:55'
pt-query-digest test2-slow.log --type=slowlog --since='1583048987' --until='1583049175'
# 170ms user time, 20ms system time, 34.03M rss, 98.80M vsz
# Current date: Mon Mar 2 10:05:52 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 2 total, 2 unique, 0.13 QPS, 0.40x concurrency ________________
# Time range: 2020-03-01T15:49:47 to 2020-03-01T15:50:02
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 6s 3s 3s 3s 3s 5ms 3s
# Lock time 6ms 190us 6ms 3ms 6ms 4ms 3ms
# Rows sent 6 3 3 3 3 0 3
# Rows examine 6 3 3 3 3 0 3
# Query size 64 30 34 32 34 2.83 32 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x6D482C964694712F6B3445151D7A429C 3.0108 50.1% 1 3.0108 0.00 SELECT x
# 2 0x8430AB741BBC096B102EDAA5ACD08366 3.0033 49.9% 1 3.0033 0.00 SELECT x # Query 1: 0 QPS, 0x concurrency, ID 0x6D482C964694712F6B3445151D7A429C at byte 0
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-01T15:49:47
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 1
# Exec time 50 3s 3s 3s 3s 3s 0 3s
# Lock time 96 6ms 6ms 6ms 6ms 6ms 0 6ms
# Rows sent 50 3 3 3 3 3 0 3
# Rows examine 50 3 3 3 3 3 0 3
# Query size 46 30 30 30 30 30 0 30
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'x'\G
# SHOW CREATE TABLE `test`.`x`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,name,sleep(1) from x\G # Query 2: 0 QPS, 0x concurrency, ID 0x8430AB741BBC096B102EDAA5ACD08366 at byte 241
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-01T15:50:02
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 1
# Exec time 49 3s 3s 3s 3s 3s 0 3s
# Lock time 3 190us 190us 190us 190us 190us 0 190us
# Rows sent 50 3 3 3 3 3 0 3
# Rows examine 50 3 3 3 3 3 0 3
# Query size 53 34 34 34 34 34 0 34
# String:
# Databases test
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'x'\G
# SHOW CREATE TABLE `test`.`x`\G
# EXPLAIN /*!50100 PARTITIONS*/
select id,name,age,sleep(1) from x\G
⑥：分析最近时间的慢查询（最近10h，单位可以为s、和m）：
pt-query-digest test2-slow.log --type=slowlog --since='10h'
# 150ms user time, 20ms system time, 34.22M rss, 98.80M vsz
# Current date: Mon Mar 2 10:13:55 2020
# Hostname: test2
# Files: test2-slow.log
# Overall: 4 total, 1 unique, 0.07 QPS, 0.34x concurrency ________________
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 18s 4s 6s 5s 6s 1s 4s
# Lock time 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 32 8 8 8 8 0 8
# Rows examine 32 8 8 8 8 0 8
# Query size 148 37 37 37 37 0 37 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============== ===== ====== ====
# 1 0x1AD46E75EF3D662BDE818F1F36DC02DD 18.4270 100.0% 4 4.6067 0.24 SELECT user # Query 1: 0.07 QPS, 0.34x concurrency, ID 0x1AD46E75EF3D662BDE818F1F36DC02DD at byte 4779
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.24
# Time range: 2020-03-02T01:13:07 to 2020-03-02T01:14:01
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 4
# Exec time 100 18s 4s 6s 5s 6s 1s 4s
# Lock time 100 3ms 122us 3ms 871us 3ms 1ms 2ms
# Rows sent 100 32 8 8 8 8 0 8
# Rows examine 100 32 8 8 8 8 0 8
# Query size 100 148 37 37 37 37 0 37
# String:
# Databases mysql
# Hosts test2 (3/75%), 192.168.100.222 (1/25%)
# Users zjy
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
# EXPLAIN /*!50100 PARTITIONS*/
select user,host,sleep(0.8) from user\G
⑦：分析指定查询类型的慢查询：
pt-query-digest test2-slow.log_bak --type=slowlog --filter '$event->{arg} =~ m/^update/i'
# 160ms user time, 0 system time, 33.95M rss, 98.80M vsz
# Current date: Mon Mar 2 10:54:08 2020
# Hostname: test2
# Files: test2-slow.log_bak
# Overall: 2 total, 2 unique, 0.00 QPS, 0.00x concurrency ________________
# Time range: 2020-02-28T10:49:02 to 2020-02-28T12:59:04
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 14s 6s 8s 7s 8s 1s 7s
# Lock time 6ms 2ms 4ms 3ms 4ms 1ms 3ms
# Rows sent 10 2 8 5 8 4.24 5
# Rows examine 10 2 8 5 8 4.24 5
# Query size 89 36 53 44.50 53 12.02 44.50 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x85DD43B595DF4DE2480E3EA0F1B26C9F 8.0111 57.2% 1 8.0111 0.00 UPDATE user sleep mysql.user
# 2 0x836D2825542008408981DFD394A2EB60 6.0065 42.8% 1 6.0065 0.00 UPDATE cluster_name sleep cluster_domain_name # Query 1: 0 QPS, 0x concurrency, ID 0x85DD43B595DF4DE2480E3EA0F1B26C9F at byte 1614
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-02-28T12:59:04
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 1
# Exec time 57 8s 8s 8s 8s 8s 0 8s
# Lock time 37 2ms 2ms 2ms 2ms 2ms 0 2ms
# Rows sent 80 8 8 8 8 8 0 8
# Rows examine 80 8 8 8 8 8 0 8
# Query size 40 36 36 36 36 36 0 36
# String:
# Databases mysql
# Hosts test2
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
# SHOW TABLE STATUS FROM `mysql` LIKE 'sleep'\G
# SHOW CREATE TABLE `mysql`.`sleep`\G
# SHOW TABLE STATUS FROM `mysql` LIKE 'user'\G
# SHOW CREATE TABLE `mysql`.`user`\G
update user,sleep(1) from mysql.user\G # Query 2: 0 QPS, 0x concurrency, ID 0x836D2825542008408981DFD394A2EB60 at byte 1118
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-02-28T10:49:02
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 1
# Exec time 42 6s 6s 6s 6s 6s 0 6s
# Lock time 62 4ms 4ms 4ms 4ms 4ms 0 4ms
# Rows sent 20 2 2 2 2 2 0 2
# Rows examine 20 2 2 2 2 2 0 2
# Query size 59 53 53 53 53 53 0 53
# String:
# Databases orchestrator
# Hosts 192.168.163.111
# Users root
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s ################################################################
# 10s+
# Tables
# SHOW TABLE STATUS FROM `orchestrator` LIKE 'cluster_name'\G
# SHOW CREATE TABLE `orchestrator`.`cluster_name`\G
# SHOW TABLE STATUS FROM `orchestrator` LIKE 'sleep'\G
# SHOW CREATE TABLE `orchestrator`.`sleep`\G
# SHOW TABLE STATUS FROM `orchestrator` LIKE 'cluster_domain_name'\G
# SHOW CREATE TABLE `orchestrator`.`cluster_domain_name`\G
update cluster_name,sleep(3) from cluster_domain_name\G
⑧：指定时间、排除指定IP、指定慢查类型(select)写入到表中：
pt-query-digest --user=root --password=root --port= --review h=192.168.163.132,D=slow_query_log,t=global_query_review --history h=192.168.163.132,D=slow_query_log,t=global_query_review_history --limit=% --filter='($event->{Bytes} = length($event->{arg}) and $event->{hostname}="test2") and ($event->{host} || $event->{ip}) !~ m/^localhost$|^192.168.163.1$/i and $event->{arg} =~ m/^select/i' --since='2020-03-23 12:00:00' --until='2020-03-23 13:00:00' /usr/local/mysql/logs/slow.log --no-report
⑨：后续补充...
2. general log：--type=genlog
属性：
$VAR1 = {
Query_time => 0,
Thread_id => '',
arg => 'SHOW FULL PROCESSLIST',
bytes => 21,
cmd => 'Query',
db => 'mysql',
fingerprint => 'show full processlist',
pos_in_log => 191402,
ts => '2020-02-29T12:21:53.692656Z'
};
general log 和 slow log的最大区别是--order-by默认从Query_time:sum改成了Query_time:cnt。general log没有执行时间。
分析报告分为二部分说明：
第一部分：总体概况说明，同上面的slow log。
第二部分：查询SQL概况说明。
# Query 1: 0 QPS, 0x concurrency, ID 0x0BBD8F114BF69E6F45609ADE347419D3 at byte 1075144
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-02-29T09:38:40.431645Z to 2020-02-29T17:03:19.210317Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
-- 次数
# Count 96 16463
-- 执行时间
# Exec time 0 0 0 0 0 0 0 0
-- 查询字节数
# Query size 90 337.62k 21 21 21 21 0 21
# String:
# Databases mysql
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
SHOW FULL PROCESSLIST\G
①：分析所有general log：
pt-query-digest test2.log --type=genlog
# 1.1s user time, 10ms system time, 37.23M rss, 101.77M vsz
# Current date: Mon Mar 2 11:54:58 2020
# Hostname: test2
# Files: test2.log
# Overall: 17.15k total, 36 unique, 0 QPS, 0x concurrency ________________
# Time range: 2020-02-29T08:16:40.412968Z to 2020-03-02T02:47:33.305124Z
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 371.27k 9 215 22.17 20.43 11.62 20.43 # Profile
# Rank Query ID Response time Calls R/Call V/M Item
# ==== ============================= ============= ===== ====== ===== ====
# 1 0x0BBD8F114BF69E6F45609ADE... 0.0000 0.0% 16463 0.0000 0.00 SHOW PROCESSLIST
# 2 0x7417646A9FE969365D51E5F0... 0.0000 0.0% 150 0.0000 0.00 ADMIN CONNECT
# MISC 0xMISC 0.0000 0.0% 533 0.0000 0.0 <34 ITEMS> # Query 1: 0 QPS, 0x concurrency, ID 0x0BBD8F114BF69E6F45609ADE347419D3 at byte 1075144
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-02-29T09:38:40.431645Z to 2020-02-29T17:03:19.210317Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 96 16463
# Exec time 0 0 0 0 0 0 0 0
# Query size 90 337.62k 21 21 21 21 0 21
# String:
# Databases mysql
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
SHOW FULL PROCESSLIST\G # Query 2: 0 QPS, 0x concurrency, ID 0x7417646A9FE969365D51E5F01B88B79E at byte 1079129
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-02-29T08:16:42.510608Z to 2020-03-02T02:47:30.977613Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 0 150
# Exec time 0 0 0 0 0 0 0 0
# Query size 1 4.39k 30 30 30 30 0 30
# String:
# Databases mysql (146/97%), test (3/2%), xyz (1/0%)
# Hosts test2 (148/98%), localhost (2/1%)
# Users root (148/98%), debian-sys... (2/1%)
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
administrator command: Connect\G
②：分析指定数据库的general log：
pt-query-digest test2.log --type=genlog --filter '($event->{db} || "") =~ m/^xyz/i'
# 760ms user time, 0 system time, 33.97M rss, 98.79M vsz
# Current date: Mon Mar 2 11:58:25 2020
# Hostname: test2
# Files: test2.log
# Overall: 19 total, 7 unique, 0 QPS, 0x concurrency _____________________
# Time range: 2020-02-29T08:16:42.510608Z to 2020-03-02T03:57:21.856375Z
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 374 11 32 19.68 28.75 5.67 16.81 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================= ============= ===== ====== =====
# 1 0x13CE8196A68B6EDD5056FEA7A295... 0.0000 0.0% 11 0.0000 0.00 SELECT opa
# MISC 0xMISC 0.0000 0.0% 8 0.0000 0.0 <6 ITEMS> # Query 1: 0 QPS, 0x concurrency, ID 0x13CE8196A68B6EDD5056FEA7A29521B5 at byte 1079780
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-02-29T08:16:53.573687Z to 2020-03-02T03:56:54.493066Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 57 11
# Exec time 0 0 0 0 0 0 0 0
# Query size 50 187 17 17 17 17 0 17
# String:
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `xyz` LIKE 'opa'\G
# SHOW CREATE TABLE `xyz`.`opa`\G
# EXPLAIN /*!50100 PARTITIONS*/
select * from opa\G
③：分析指定用户的general log：
pt-query-digest test2.log --type=genlog --filter '($event->{user} || "") =~ m/^rep/i'
# 760ms user time, 40ms system time, 34.09M rss, 98.66M vsz
# Current date: Mon Mar 2 12:01:37 2020
# Hostname: test2
# Files: test2.log
# Overall: 1 total, 1 unique, 0 QPS, 0x concurrency ______________________
# Time range: all events occurred at 2020-03-02T04:01:10.355849Z
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 30 30 30 30 30 0 30 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x7417646A9FE969365D51E5F01B88B79E 0.0000 0.0% 1 0.0000 0.00 ADMIN CONNECT # Query 1: 0 QPS, 0x concurrency, ID 0x7417646A9FE969365D51E5F01B88B79E at byte 1080607
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02T04:01:10.355849Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 100 30 30 30 30 30 0 30
# String:
# Databases xyz
# Hosts test2
# Users rep
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
administrator command: Connect\G
④：分析指定IP的general log：只能查询有连接信息的一行
pt-query-digest test2.log --type=genlog --filter '($event->{host} || $event->{ip} || "") =~ m/^192.168.163.1/i'
# 680ms user time, 10ms system time, 34.10M rss, 98.67M vsz
# Current date: Mon Mar 2 12:07:37 2020
# Hostname: test2
# Files: test2.log
# Overall: 1 total, 1 unique, 0 QPS, 0x concurrency ______________________
# Time range: all events occurred at 2020-03-02T04:04:44.525323Z
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 30 30 30 30 30 0 30 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x7417646A9FE969365D51E5F01B88B79E 0.0000 0.0% 1 0.0000 0.00 ADMIN CONNECT # Query 1: 0 QPS, 0x concurrency, ID 0x7417646A9FE969365D51E5F01B88B79E at byte 1080854
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02T04:04:44.525323Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 100 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 100 30 30 30 30 30 0 30
# String:
# Databases xyz
# Hosts 192.168.163.1
# Users rep
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
administrator command: Connect\G
⑤：分析指定时间范围的general log：
因为since、until是和属性ts进行比较的，而ts表示慢查询的timestamp，general log的ts格式不支持。
Argument "2020-03-02T03:56:40.729571Z" isn't numeric in numeric ge (>=) at /usr/bin/pt-query-digest line 13828
⑥：分析指定查询类型的general log：
pt-query-digest test2.log --type=genlog --filter '$event->{arg} =~ m/^update/i'
# 800ms user time, 20ms system time, 34.14M rss, 98.66M vsz
# Current date: Mon Mar 2 12:53:22 2020
# Hostname: test2
# Files: test2.log
# Overall: 3 total, 2 unique, 0 QPS, 0x concurrency ______________________
# Time range: 2020-03-01T15:51:00.127775Z to 2020-03-01T15:51:41.615228Z
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 117 29 44 39 42.48 6.47 42.48 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x80ADD689782BEAD7D70ED30064A844AE 0.0000 0.0% 2 0.0000 0.00 UPDATE host
# 2 0xD2D49F3A84020704D76F13F185D17AF0 0.0000 0.0% 1 0.0000 0.00 UPDATE host # Query 1: 0 QPS, 0x concurrency, ID 0x80ADD689782BEAD7D70ED30064A844AE at byte 1076295
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-03-01T15:51:00.127775Z to 2020-03-01T15:51:41.615228Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 66 2
# Exec time 0 0 0 0 0 0 0 0
# Query size 75 88 44 44 44 44 0 44
# String:
# Databases test
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'host'\G
# SHOW CREATE TABLE `test`.`host`\G
update host set hostname = concat('test',id)\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select hostname = concat('test',id) from host \G # Query 2: 0 QPS, 0x concurrency, ID 0xD2D49F3A84020704D76F13F185D17AF0 at byte 1076124
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-01T15:51:18.804090Z
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 33 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 24 29 29 29 29 29 0 29
# String:
# Databases test
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `test` LIKE 'host'\G
# SHOW CREATE TABLE `test`.`host`\G
update host set hostname = ''\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select hostname = '' from host \G
⑦：后续补充中...
3. binlog：--type=binlog
属性：
$VAR1 = {
Query_time => '',
Thread_id => '',
arg => '...',
bytes => 40,
cmd => 'Query',
db => 'xyz',
end_log_pos => '',
error_code => '',
fingerprint => '...',
offset => '',
pos_in_log => 1942,
server_id => '',
timestamp => '',
ts => '200302 15:20:57'
};
注意： 在测试的时候发现，binlog如果是ROW模式，则分析不出SQL信息？
因为没有用户（user）、IP属性，所以不能通过它们分析。
预备：在分析binlog之前，需要先把binlog转换成文本：
mysqlbinlog --no-defaults -vv --base64-output=DECODE-ROWS mysql-bin.000053 >mysql-bin.000053.txt
① 分析所有binlog：
pt-query-digest /var/log/mysql/mysql-bin.000053.txt --type=binlog
# 150ms user time, 30ms system time, 34.53M rss, 99.06M vsz
# Current date: Mon Mar 2 15:43:19 2020
# Hostname: test2
# Files: /var/log/mysql/mysql-bin.000053.txt
# Overall: 4 total, 6 unique, 0.03 QPS, 0x concurrency ___________________
# Time range: 2020-03-02 15:18:30 to 15:20:57
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 213 5 71 30.43 69.19 23.03 38.53
# @@session.au 1 1 1 1 1 0 1
# @@session.au 1 1 1 1 1 0 1
# @@session.au 1 1 1 1 1 0 1
# @@session.ch 33 33 33 33 33 0 33
# @@session.co 33 33 33 33 33 0 33
# @@session.co 8 8 8 8 8 0 8
# @@session.fo 1 1 1 1 1 0 1
# @@session.lc 0 0 0 0 0 0 0
# @@session.ps 176 176 176 176 176 0 176
# @@session.sq 0 0 0 0 0 0 0
# @@session.sq 1.34G 1.34G 1.34G 1.34G 1.34G 0 1.34G
# @@session.un 1 1 1 1 1 0 1
# error code 0 0 0 0 0 0 0 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x82CE37495437A097404F41D8B9BC40F5 0.0000 0.0% 1 0.0000 0.00 UPDATE opa
# 2 0x8D589AFA4DFAEEED85FFF5AA78E5FF6A 0.0000 0.0% 2 0.0000 0.00 BEGIN
# 3 0x22F19246E8077C1AD6C6EBCA2A2AA193 0.0000 0.0% 1 0.0000 0.00 UPDATE opa # Query 1: 0 QPS, 0x concurrency, ID 0x82CE37495437A097404F41D8B9BC40F5 at byte 1942
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02 15:20:57
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 25 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 18 40 40 40 40 40 0 40
# error code 0 0 0 0 0 0 0 0
# String:
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `xyz` LIKE 'opa'\G
# SHOW CREATE TABLE `xyz`.`opa`\G
update opa set name = concat(id,name,id)\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select name = concat(id,name,id) from opa \G # Query 2: 0.01 QPS, 0x concurrency, ID 0x8D589AFA4DFAEEED85FFF5AA78E5FF6A at byte 1780
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-03-02 15:18:30 to 15:20:57
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 2
# Exec time 0 0 0 0 0 0 0 0
# Query size 4 10 5 5 5 5 0 5
# @@session.au 100 1 1 1 1 1 0 1
# @@session.au 100 1 1 1 1 1 0 1
# @@session.au 100 1 1 1 1 1 0 1
# @@session.ch 100 33 33 33 33 33 0 33
# @@session.co 100 33 33 33 33 33 0 33
# @@session.co 100 8 8 8 8 8 0 8
# @@session.fo 100 1 1 1 1 1 0 1
# @@session.lc 0 0 0 0 0 0 0 0
# @@session.ps 100 176 176 176 176 176 0 176
# @@session.sq 0 0 0 0 0 0 0 0
# @@session.sq 100 1.34G 1.34G 1.34G 1.34G 1.34G 0 1.34G
# @@session.un 100 1 1 1 1 1 0 1
# error code 0 0 0 0 0 0 0 0
# String:
# @@session.co default
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
BEGIN\G # Query 3: 0 QPS, 0x concurrency, ID 0x22F19246E8077C1AD6C6EBCA2A2AA193 at byte 1289
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02 15:18:30
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 25 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 19 42 42 42 42 42 0 42
# error code 0 0 0 0 0 0 0 0
# String:
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `xyz` LIKE 'opa'\G
# SHOW CREATE TABLE `xyz`.`opa`\G
update opa set name = concat(name,id,name)\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select name = concat(name,id,name) from opa \G
②：分析指定数据库的bin log：
pt-query-digest /var/log/mysql/mysql-bin.000053.txt --type=binlog --filter '($event->{db} || "") =~ m/^xyz/i'
# 160ms user time, 20ms system time, 33.99M rss, 98.66M vsz
# Current date: Mon Mar 2 15:45:49 2020
# Hostname: test2
# Files: /var/log/mysql/mysql-bin.000053.txt
# Overall: 3 total, 6 unique, 0.02 QPS, 0x concurrency ___________________
# Time range: 2020-03-02 15:18:30 to 15:20:57
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 208 5 71 34.67 69.19 22.41 41.47
# error code 0 0 0 0 0 0 0 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x82CE37495437A097404F41D8B9BC40F5 0.0000 0.0% 1 0.0000 0.00 UPDATE opa
# MISC 0xMISC 0.0000 0.0% 2 0.0000 0.0 <2 ITEMS> # Query 1: 0 QPS, 0x concurrency, ID 0x82CE37495437A097404F41D8B9BC40F5 at byte 1942
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02 15:20:57
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 33 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 19 40 40 40 40 40 0 40
# error code 0 0 0 0 0 0 0 0
# String:
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `xyz` LIKE 'opa'\G
# SHOW CREATE TABLE `xyz`.`opa`\G
update opa set name = concat(id,name,id)\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select name = concat(id,name,id) from opa \G
③：分析指定时间范围的binlog
pt-query-digest /var/log/mysql/mysql-bin.000053.txt --type=binlog --since='2020-03-01 15:49:47' --until='2020-03-05 15:52:55'
# 170ms user time, 10ms system time, 34.39M rss, 99.05M vsz
# Current date: Mon Mar 2 16:00:25 2020
# Hostname: test2
# Files: /var/log/mysql/mysql-bin.000053.txt
# Overall: 4 total, 6 unique, 0.03 QPS, 0x concurrency ___________________
# Time range: 2020-03-02 15:18:30 to 15:20:57
# Attribute total min max avg 95% stddev median
# ============ ======= ======= ======= ======= ======= ======= =======
# Exec time 0 0 0 0 0 0 0
# Query size 213 5 71 30.43 69.19 23.03 38.53
# @@session.au 1 1 1 1 1 0 1
# @@session.au 1 1 1 1 1 0 1
# @@session.au 1 1 1 1 1 0 1
# @@session.ch 33 33 33 33 33 0 33
# @@session.co 33 33 33 33 33 0 33
# @@session.co 8 8 8 8 8 0 8
# @@session.fo 1 1 1 1 1 0 1
# @@session.lc 0 0 0 0 0 0 0
# @@session.ps 176 176 176 176 176 0 176
# @@session.sq 0 0 0 0 0 0 0
# @@session.sq 1.34G 1.34G 1.34G 1.34G 1.34G 0 1.34G
# @@session.un 1 1 1 1 1 0 1
# error code 0 0 0 0 0 0 0 # Profile
# Rank Query ID Response time Calls R/Call V/M
# ==== ================================== ============= ===== ====== =====
# 1 0x82CE37495437A097404F41D8B9BC40F5 0.0000 0.0% 1 0.0000 0.00 UPDATE opa
# 2 0x8D589AFA4DFAEEED85FFF5AA78E5FF6A 0.0000 0.0% 2 0.0000 0.00 BEGIN
# MISC 0xMISC 0.0000 0.0% 1 0.0000 0.0 <1 ITEMS> # Query 1: 0 QPS, 0x concurrency, ID 0x82CE37495437A097404F41D8B9BC40F5 at byte 1942
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: all events occurred at 2020-03-02 15:20:57
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 25 1
# Exec time 0 0 0 0 0 0 0 0
# Query size 18 40 40 40 40 40 0 40
# error code 0 0 0 0 0 0 0 0
# String:
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
# Tables
# SHOW TABLE STATUS FROM `xyz` LIKE 'opa'\G
# SHOW CREATE TABLE `xyz`.`opa`\G
update opa set name = concat(id,name,id)\G
# Converted for EXPLAIN
# EXPLAIN /*!50100 PARTITIONS*/
select name = concat(id,name,id) from opa \G # Query 2: 0.01 QPS, 0x concurrency, ID 0x8D589AFA4DFAEEED85FFF5AA78E5FF6A at byte 1780
# This item is included in the report because it matches --limit.
# Scores: V/M = 0.00
# Time range: 2020-03-02 15:18:30 to 15:20:57
# Attribute pct total min max avg 95% stddev median
# ============ === ======= ======= ======= ======= ======= ======= =======
# Count 50 2
# Exec time 0 0 0 0 0 0 0 0
# Query size 4 10 5 5 5 5 0 5
# @@session.au 100 1 1 1 1 1 0 1
# @@session.au 100 1 1 1 1 1 0 1
# @@session.au 100 1 1 1 1 1 0 1
# @@session.ch 100 33 33 33 33 33 0 33
# @@session.co 100 33 33 33 33 33 0 33
# @@session.co 100 8 8 8 8 8 0 8
# @@session.fo 100 1 1 1 1 1 0 1
# @@session.lc 0 0 0 0 0 0 0 0
# @@session.ps 100 176 176 176 176 176 0 176
# @@session.sq 0 0 0 0 0 0 0 0
# @@session.sq 100 1.34G 1.34G 1.34G 1.34G 1.34G 0 1.34G
# @@session.un 100 1 1 1 1 1 0 1
# error code 0 0 0 0 0 0 0 0
# String:
# @@session.co default
# Databases xyz
# Query_time distribution
# 1us
# 10us
# 100us
# 1ms
# 10ms
# 100ms
# 1s
# 10s+
BEGIN\G
④：分析最近时间的binlog
pt-query-digest /var/log/mysql/mysql-bin.000053.txt --type=binlog --since='60m'
⑤：分析指定类型的binlog
pt-query-digest /var/log/mysql/mysql-bin.000053.txt --type=binlog --filter '$event->{arg} =~ m/^update/i'
⑥：后续补充中...
4. processlist
①：抓取show processlist的慢查，转存到指定文件：
-- 间隔1s执行show full processlist 拉取processlist中订阅到的慢查询转存到指定的文件。
pt-query-digest --processlist h=192.168.163.132,u=root,p=root --interval=1 --output=slowlog > /tmp/process.log
说明：比较适用于一些云数据库没有看慢查文件的权限。
②：分析show processlist的慢查：配合--run-time使用，可以限制执行时间，到时间（--iterations=1）之后退出并且打印分析。
-- 间隔1s执行show full processlist，永远运行，每30秒生成一次报告
pt-query-digest --processlist h=192.168.163.132,u=root,p=root --interval=1 --run-time-mode=clock --run-time=30s --iterations=0
说明：比较适用于一些问题排查方面的工作。
5. tcpdump
先抓包：
tcpdump -s 65535 -x -nn -q -tttt -i any -c 1000 port 3306 > mysql.tcp.txt
再分析：
pt-query-digest --type tcpdump mysql.tcp.txt
二 分析转存方面：将查询数据从slow.log保存到MySQL
1，查询&审计转存到表
pt-query-digest --review u=root,p=root,h=192.168.163.132,P=3306,D=xyz,t=query_review --create-review-table test2-slow.log
说明：把慢查询记录到数据库xyz的query_review表中：
mysql> select * from query_review\G
*************************** 1. row ***************************
checksum: 02DFE94A93ADC62623BF2E1E98C17EC3
fingerprint: select id,hostname,agent_version,sleep(?) from host limit ?
sample: select id,hostname,agent_version,sleep(0.5) from host limit 10
first_seen: 2020-03-03 00:07:55
last_seen: 2020-03-03 00:08:01
reviewed_by: NULL
reviewed_on: NULL
comments: NULL
*************************** 2. row ***************************
checksum: 37FD1F8E9516984F7D77EB5364A382DD
fingerprint: select id,name,sleep(?) from opa
sample: select id,name,sleep(0.5) from opa
first_seen: 2020-03-03 00:06:50
last_seen: 2020-03-03 00:07:04
reviewed_by: NULL
reviewed_on: NULL
comments: NULL
*************************** 3. row ***************************
checksum: 8430AB741BBC096B102EDAA5ACD08366
fingerprint: select id,name,age,sleep(?) from x
sample: select id,name,age,sleep(1) from x
first_seen: 2020-03-03 00:08:15
last_seen: 2020-03-03 00:08:15
reviewed_by: NULL
reviewed_on: NULL
comments: NULL
*************************** 4. row ***************************
checksum: D4B20686AF10136F85E9FAE50E04AE92
fingerprint: select name,sleep(?) from opa
sample: select name,sleep(0.5) from opa
first_seen: 2020-03-03 00:07:20
last_seen: 2020-03-03 00:07:26
reviewed_by: NULL
reviewed_on: NULL
comments: NULL
表列说明：
COLUMN MEANING
=========== ====================================================
checksum 查询指纹的64位校验和
fingerprint 查询的抽象版本；它的主键
sample 查询样本的文本
first_seen 此类查询的最早时间戳
last_seen 此类查询的最近时间戳
reviewed_by 如果设置，此后将跳过查询
reviewed_on 没有赋予任何特殊含义
comments 没有赋予任何特殊含义
注意：如果表中的记录reviewed_by被设了值，则下次运行pt-query-digest --review不会显示该query。
2，查询分析指标转存到表
pt-query-digest --history u=root,p=root,h=192.168.163.132,P=3306,D=xyz,t=query_review_history --create-review-table test2-slow.log
说明：把慢查询记录的分析指标转存到数据库xyz的query_review_history表中：
mysql> select * from query_review_history\G
*************************** 1. row ***************************
checksum: 02DFE94A93ADC62623BF2E1E98C17EC3
sample: select id,hostname,agent_version,sleep(0.5) from host limit 10
ts_min: 2020-03-03 00:07:55
ts_max: 2020-03-03 00:08:01
ts_cnt: 2
Query_time_sum: 10.0236
Query_time_min: 5.00726
Query_time_max: 5.01629
Query_time_pct_95: 5.01629
Query_time_stddev: 0.00638659
Query_time_median: 5.01178
Lock_time_sum: 0.004069
Lock_time_min: 0.000299
Lock_time_max: 0.00377
Lock_time_pct_95: 0.00377
Lock_time_stddev: 0.00245437
Lock_time_median: 0.0020345
Rows_sent_sum: 20
Rows_sent_min: 10
Rows_sent_max: 10
Rows_sent_pct_95: 10
Rows_sent_stddev: 0
Rows_sent_median: 10
Rows_examined_sum: 20
Rows_examined_min: 10
Rows_examined_max: 10
Rows_examined_pct_95: 10
Rows_examined_stddev: 0
Rows_examined_median: 10
Rows_affected_sum: NULL
Rows_affected_min: NULL
Rows_affected_max: NULL
Rows_affected_pct_95: NULL
Rows_affected_stddev: NULL
Rows_affected_median: NULL
Rows_read_sum: NULL
Rows_read_min: NULL
Rows_read_max: NULL
Rows_read_pct_95: NULL
Rows_read_stddev: NULL
Rows_read_median: NULL
Merge_passes_sum: NULL
Merge_passes_min: NULL
Merge_passes_max: NULL
Merge_passes_pct_95: NULL
Merge_passes_stddev: NULL
Merge_passes_median: NULL
InnoDB_IO_r_ops_min: NULL
InnoDB_IO_r_ops_max: NULL
InnoDB_IO_r_ops_pct_95: NULL
InnoDB_IO_r_ops_stddev: NULL
InnoDB_IO_r_ops_median: NULL
InnoDB_IO_r_bytes_min: NULL
InnoDB_IO_r_bytes_max: NULL
InnoDB_IO_r_bytes_pct_95: NULL
InnoDB_IO_r_bytes_stddev: NULL
InnoDB_IO_r_bytes_median: NULL
InnoDB_IO_r_wait_min: NULL
InnoDB_IO_r_wait_max: NULL
InnoDB_IO_r_wait_pct_95: NULL
InnoDB_IO_r_wait_stddev: NULL
InnoDB_IO_r_wait_median: NULL
InnoDB_rec_lock_wait_min: NULL
InnoDB_rec_lock_wait_max: NULL
InnoDB_rec_lock_wait_pct_95: NULL
InnoDB_rec_lock_wait_stddev: NULL
InnoDB_rec_lock_wait_median: NULL
InnoDB_queue_wait_min: NULL
InnoDB_queue_wait_max: NULL
InnoDB_queue_wait_pct_95: NULL
InnoDB_queue_wait_stddev: NULL
InnoDB_queue_wait_median: NULL
InnoDB_pages_distinct_min: NULL
InnoDB_pages_distinct_max: NULL
InnoDB_pages_distinct_pct_95: NULL
InnoDB_pages_distinct_stddev: NULL
InnoDB_pages_distinct_median: NULL
QC_Hit_cnt: NULL
QC_Hit_sum: NULL
Full_scan_cnt: NULL
Full_scan_sum: NULL
Full_join_cnt: NULL
Full_join_sum: NULL
Tmp_table_cnt: NULL
Tmp_table_sum: NULL
Tmp_table_on_disk_cnt: NULL
Tmp_table_on_disk_sum: NULL
Filesort_cnt: NULL
Filesort_sum: NULL
Filesort_on_disk_cnt: NULL
Filesort_on_disk_sum: NULL
注意：通过report打印出来的信息转存到表中。针对1，2生成的表可以进行关联，来找出那些没有被审计的SQL。通过这2个参数，可以做成一个MySQL的慢查询审计平台，如Anemometer。
三 总结：
本文大致说明了pt-query-digest的使用方法，其参数的介绍说明可以看percona-toolkit 之 【pt-query-digest】介绍，也可以直接去官网看文档。要是有更多的比较常用的方法，会不定期的更新该文章。
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