pt-query-digest 慢日志监控

一、安装percona-toolkit，以centos为例

yum -y install https://repo.percona.com/yum/percona-release-latest.noarch.rpm 
yum -y install percona-toolkit

二、 创建慢日志收集表 mysql_slow_query_review.sql

CREATE TABLE `mysql_slow_query_review` (
  `checksum` CHAR(32) NOT NULL,
  `fingerprint` longtext NOT NULL,
  `sample` longtext NOT NULL,
  `first_seen` datetime(6) DEFAULT NULL,
  `last_seen` datetime(6) DEFAULT NULL,
  `reviewed_by` varchar(20) DEFAULT NULL,
  `reviewed_on` datetime(6) DEFAULT NULL,
  `comments` longtext,
  `reviewed_status` varchar(24) DEFAULT NULL,
  PRIMARY KEY (`checksum`),
  KEY `idx_last_seen` (`last_seen`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

CREATE TABLE `mysql_slow_query_review_history` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `hostname_max` varchar(64) NOT NULL,
  `client_max` varchar(64) DEFAULT NULL,
  `user_max` varchar(64) NOT NULL,
  `db_max` varchar(64) DEFAULT NULL,
  `checksum` CHAR(32) NOT NULL,
  `sample` longtext NOT NULL,
  `ts_min` datetime(6) NOT NULL,
  `ts_max` datetime(6) NOT NULL,
  `ts_cnt` float DEFAULT NULL,
  `Query_time_sum` float DEFAULT NULL,
  `Query_time_min` float DEFAULT NULL,
  `Query_time_max` float DEFAULT NULL,
  `Query_time_pct_95` float DEFAULT NULL,
  `Query_time_stddev` float DEFAULT NULL,
  `Query_time_median` float DEFAULT NULL,
  `Lock_time_sum` float DEFAULT NULL,
  `Lock_time_min` float DEFAULT NULL,
  `Lock_time_max` float DEFAULT NULL,
  `Lock_time_pct_95` float DEFAULT NULL,
  `Lock_time_stddev` float DEFAULT NULL,
  `Lock_time_median` float DEFAULT NULL,
  `Rows_sent_sum` float DEFAULT NULL,
  `Rows_sent_min` float DEFAULT NULL,
  `Rows_sent_max` float DEFAULT NULL,
  `Rows_sent_pct_95` float DEFAULT NULL,
  `Rows_sent_stddev` float DEFAULT NULL,
  `Rows_sent_median` float DEFAULT NULL,
  `Rows_examined_sum` float DEFAULT NULL,
  `Rows_examined_min` float DEFAULT NULL,
  `Rows_examined_max` float DEFAULT NULL,
  `Rows_examined_pct_95` float DEFAULT NULL,
  `Rows_examined_stddev` float DEFAULT NULL,
  `Rows_examined_median` float DEFAULT NULL,
  `Rows_affected_sum` float DEFAULT NULL,
  `Rows_affected_min` float DEFAULT NULL,
  `Rows_affected_max` float DEFAULT NULL,
  `Rows_affected_pct_95` float DEFAULT NULL,
  `Rows_affected_stddev` float DEFAULT NULL,
  `Rows_affected_median` float DEFAULT NULL,
  `Rows_read_sum` float DEFAULT NULL,
  `Rows_read_min` float DEFAULT NULL,
  `Rows_read_max` float DEFAULT NULL,
  `Rows_read_pct_95` float DEFAULT NULL,
  `Rows_read_stddev` float DEFAULT NULL,
  `Rows_read_median` float DEFAULT NULL,
  `Merge_passes_sum` float DEFAULT NULL,
  `Merge_passes_min` float DEFAULT NULL,
  `Merge_passes_max` float DEFAULT NULL,
  `Merge_passes_pct_95` float DEFAULT NULL,
  `Merge_passes_stddev` float DEFAULT NULL,
  `Merge_passes_median` float DEFAULT NULL,
  `InnoDB_IO_r_ops_min` float DEFAULT NULL,
  `InnoDB_IO_r_ops_max` float DEFAULT NULL,
  `InnoDB_IO_r_ops_pct_95` float DEFAULT NULL,
  `InnoDB_IO_r_ops_stddev` float DEFAULT NULL,
  `InnoDB_IO_r_ops_median` float DEFAULT NULL,
  `InnoDB_IO_r_bytes_min` float DEFAULT NULL,
  `InnoDB_IO_r_bytes_max` float DEFAULT NULL,
  `InnoDB_IO_r_bytes_pct_95` float DEFAULT NULL,
  `InnoDB_IO_r_bytes_stddev` float DEFAULT NULL,
  `InnoDB_IO_r_bytes_median` float DEFAULT NULL,
  `InnoDB_IO_r_wait_min` float DEFAULT NULL,
  `InnoDB_IO_r_wait_max` float DEFAULT NULL,
  `InnoDB_IO_r_wait_pct_95` float DEFAULT NULL,
  `InnoDB_IO_r_wait_stddev` float DEFAULT NULL,
  `InnoDB_IO_r_wait_median` float DEFAULT NULL,
  `InnoDB_rec_lock_wait_min` float DEFAULT NULL,
  `InnoDB_rec_lock_wait_max` float DEFAULT NULL,
  `InnoDB_rec_lock_wait_pct_95` float DEFAULT NULL,
  `InnoDB_rec_lock_wait_stddev` float DEFAULT NULL,
  `InnoDB_rec_lock_wait_median` float DEFAULT NULL,
  `InnoDB_queue_wait_min` float DEFAULT NULL,
  `InnoDB_queue_wait_max` float DEFAULT NULL,
  `InnoDB_queue_wait_pct_95` float DEFAULT NULL,
  `InnoDB_queue_wait_stddev` float DEFAULT NULL,
  `InnoDB_queue_wait_median` float DEFAULT NULL,
  `InnoDB_pages_distinct_min` float DEFAULT NULL,
  `InnoDB_pages_distinct_max` float DEFAULT NULL,
  `InnoDB_pages_distinct_pct_95` float DEFAULT NULL,
  `InnoDB_pages_distinct_stddev` float DEFAULT NULL,
  `InnoDB_pages_distinct_median` float DEFAULT NULL,
  `QC_Hit_cnt` float DEFAULT NULL,
  `QC_Hit_sum` float DEFAULT NULL,
  `Full_scan_cnt` float DEFAULT NULL,
  `Full_scan_sum` float DEFAULT NULL,
  `Full_join_cnt` float DEFAULT NULL,
  `Full_join_sum` float DEFAULT NULL,
  `Tmp_table_cnt` float DEFAULT NULL,
  `Tmp_table_sum` float DEFAULT NULL,
  `Tmp_table_on_disk_cnt` float DEFAULT NULL,
  `Tmp_table_on_disk_sum` float DEFAULT NULL,
  `Filesort_cnt` float DEFAULT NULL,
  `Filesort_sum` float DEFAULT NULL,
  `Filesort_on_disk_cnt` float DEFAULT NULL,
  `Filesort_on_disk_sum` float DEFAULT NULL,
  `Bytes_sum` float DEFAULT NULL,
  `Bytes_min` float DEFAULT NULL,
  `Bytes_max` float DEFAULT NULL,
  `Bytes_pct_95` float DEFAULT NULL,
  `Bytes_stddev` float DEFAULT NULL,
  `Bytes_median` float DEFAULT NULL,
  PRIMARY KEY (`id`),
  UNIQUE KEY (checksum, ts_min, ts_max),
  KEY `idx_hostname_max_ts_min` (`hostname_max`,`ts_min`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

三、部署脚本

#!/bin/bash
DIR="$( cd "$( dirname "$0"  )" && pwd  )"
cd $DIR

#配置archery数据库的连接地址
monitor_db_host="127.0.0.1"
monitor_db_port=3306
monitor_db_user="root"
monitor_db_password="123456"
monitor_db_database="archery"

#实例慢日志位置
slowquery_file="/home/mysql/log_slow.log"
pt_query_digest="/usr/bin/pt-query-digest"

#实例连接信息
hostname="mysql_host:mysql_port" # 和archery实例配置内容保持一致，用于archery做筛选

#获取上次分析时间，初始化时请删除last_analysis_time_$hostname文件，可分析全部日志数据
if [ -s last_analysis_time_$hostname ]; then
    last_analysis_time=`cat last_analysis_time_$hostname`
else
    last_analysis_time='1000-01-01 00:00:00'
fi

#收集日志
#RDS需要增加--no-version-check选项
$pt_query_digest \
--user=$monitor_db_user --password=$monitor_db_password --port=$monitor_db_port \
--review h=$monitor_db_host,D=$monitor_db_database,t=mysql_slow_query_review  \
--history h=$monitor_db_host,D=$monitor_db_database,t=mysql_slow_query_review_history  \
--no-report --limit=100% --charset=utf8 \
--since "$last_analysis_time" \
--filter="\$event->{Bytes} = length(\$event->{arg}) and \$event->{hostname}=\"$hostname\"  and \$event->{client}=\$event->{ip} " \
$slowquery_file > /tmp/analysis_slow_query.log

echo `date +"%Y-%m-%d %H:%M:%S"`>last_analysis_time_$hostname