Memo from: http://blog.csdn.net/seteor/article/details/240179131. Introduction to ToolsPt-query-digest is a tool for analyzing slow queries for MySQL, which analyzes Binlog, general log, Slowlog, It can also be analyzed using showprocesslist or
Recently in the use of Elkstack to the System log analysis, on the internet also saw the use of logstash cases, but found that can not be resolved properly, and then re-take the time to do regular calculations, the main code is as
mysql-Slow Query logtags (space delimited): MySQLTurn on slow query log慢查询是一种mysql提供的日志,记录所有执行时间超过某个时间界限的sql的语句。这个时间界限我们可以指定。在mysql中默认没有开启慢查询,即使开启了,只会记录执行的sql语句超过10秒的语句[Way One]Enter mysql:mysql-uroot-h127.0.0.1-proot# to view the parameters related
1. Usage and parameter descriptionpt-query-Digest [OPTIONS] [FILES] [DSN]--create-review-table # #当使用--when the review parameter outputs the analysis results to a table, it is automatically created without a table. --create-history-table #
Recently found a very useful MySQL slow query log visualization tools, online can also find a lot of information, here combined with their own actual situation to reorganize.1. Experimental environment 1.1 system environment:操作系统:CentOS 6.5 64位主机地址:1
Lab Environment:OS X EI Captian + MySQL 5.7I. Configure MySQL to automatically record slow query logView variables, i.e. configuration informationshow (global) variables like '%slow_query%'To modify a variable:set global 变量名 = 值Variables related to
open MySQL slow query under Linux1. Introduction to Slow QueriesAs the name implies, the slow query log is a long-running query SQL statement, the default file name is Hostname-slow.log, the default directory is also the data directory. The slow
1. mysql-log-filter tool script usage instructions: an analysis tool found on googlecode provides two executable scripts: python and php. Code. google. compmysql-log-filter (requires a ladder to climb the wall), bitsCN Download link: 1.
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Count, the number of SQL executions and percentage of the total slow log Count. time, execution Time, including the total Time, average Time,
The slow log in mysql is a log tool used to record SQL statements that have been executed for a long time (beyond long_query_time seconds.
Enable slow log
Set in my. cnf
[mysqld]
slow_query_log=on
slow_query_log_file=mysql-slow
Restart
Monitor SQL statement execution efficiency based on mysql slow logsEnable MySQL log-slow-queries (slow query records ).In Linux, find my. cnf file (usually in/etc/mysql/), and you may find that the file cannot be saved after modification, because
Mysql slow query log (slow_query_log_file) Switch slow_query_log_file the log becomes very large and it is inconvenient to analyze its input items. We want to generate a slow_query_log_file file every day and analyze the log file every day. How to
First install LNMP environment, require PHP-5.3 or above. Reference: isadba.com? P82 or refer to isadba.com? P572 and then download Anemometergitclonegithub. combox
First install LNMP environment, require PHP-5.3 and above versions. Reference: http:/
MySQL slow query, MySQL
Brief description:
To analyze the query performance of MySQL statements, in addition to using the EXPLAIN command to output the execution plan, MySQL can also record the statements whose query exceeds the specified time, the
MySQL slow query log analysis bitsCN.com
The most basic is mysql's mysqlslowdump
Easy to use:
Mysqldumpslow-s c-t 20 host-slow.log
Parameters:
1.-s, sorting, c, t, l, r, and ac, at, al, and ar are sorted by query times, time, lock time, and
In a production environment, logstash often processes logs in multiple formats. Different log formats have different parsing methods. The following is an example of how logstash processes multi-line logs and analyzes MySQL slow query logs. This is a
Slow query logs are composed of some SQL statements. When the query time exceeds the value of long_query_time, the slow query log is generated. The minimum value of longquerytime is 1 s and the default value is 1 s.
Slow query logs are composed of
Mysql has a function to log down and run slow SQL statements. This log is not available by default. To enable this function, modify my. cnf or add some parameters when mysql is started.
If you modify it in my. cnf, add the following
MySQL slow query log
MySQL supports slow query logs. You can configure query records that have exceeded the specified time for SQL query to log. This is a very effective tool in optimizing SQL queries and can help us quickly locate the problematic
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