mysql slow query

Mysql slow query logs are very useful for queries with tracing problems. You can analyze the resource-consuming SQL statements in the current program. How can I open mysql slow query log records, next, we will introduce you in detail Mysql slow

In Linux, enable MySQL slow query. The configuration file of MySQL in Windows is usually my. cnf. Find [mysqld] and add log-slow-queriesdatamysqldatas. In Linux, enable MySQL slow query. The configuration file of MySQL in Windows is usually my. cnf.

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

The slow_query_log_file 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 cut by day? We have come up with this method to

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.

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:/

Configure slow queryThe default my. cnf file is in the/etc/directory.Vim/etc/my. cnf# Slow_querySlow_query_log = 1 # enable slow querySlow_query_log_file =/var/lib/mysql/mysql-slow.log # set the slow query pathLong_query_time = 0.01 # set the slow

1. Install Mysqlsla The code is as follows Copy Code wget http://hackmysql.com/scripts/mysqlsla-2.03.tar.gzTar zvxf mysqlsla-2.03.tar.gzCD mysqlsla-2.03Perl makefile.plMakeMake install Perl makefile.pl will

To see if the MySQL server's slow query status is turned on: 1 show variables like'%slow%'; Slow_launch_time, which means more than

MySQL Slow log is often the problem of locating SQL performance. Index usage can be adjusted by slow log analysis. This is one of the most used features. At present, MySQL also supports the slow logging below the millisecond level, this feature has

MySQL has a function is log down to run the slower SQL statement, the default is not this log, in order to open this function, to modify the my.cnf or in the MySQL boot when the add some parameters. If you modify inside the MY.CNF, add the following

Edit the MY.CNF or My.ini file to remove the comments from the following lines of code: Copy Code code as follows: Log_slow_queries =/var/log/mysql/mysql-slow.log Long_query_time = 2 Log-queries-not-using-indexes This

Some settings for MySQL slow query1) Check to see if MySQL turns on slow query logShow variables like ' Slow_query_log ';2) Set non-indexed records to slow query logset global log_queries_not_using_indexes=on;3) See how long SQL is logged to the

View status show VARIABLES like '%slow_query_log% 'Turn on set global show_query_log=1 (fail after reboot)Permanent effect Modification MY.CNF joinSlow_query_log=1Show_query_log_file=/var/lib/mysql/at-slow.logModify Time Threshold (default is

First, IntroductionPt-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 MySQL protocol data crawled by tcpdump. The analysis results can be

As we all know, in the case of large traffic, can add node or change the schema can effectively alleviate the database pressure, but all the origin, all from a single MySQL start. The following summarizes some of the experiences that have been used

As we all know, in the case of large traffic, can add node or change the schema can effectively alleviate the database pressure, but all the origin, all from a single MySQL start. The following summarizes some of the experiences that have been used

First, the environmentOs:centos Release 5.8 (64-bit)db:mysql5.5.17Second, the operation Delete the slow query log directly from the command rm-fThird, problems ariseSlow query log is not automatically generated, (if there is a backup, copy back

First, IntroductionPt-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 MySQL protocol data crawled by tcpdump. The analysis results can be

sometimes we're less efficient in locating systems. Query syntax, you need to open the slow query log, which is slowquery Log . The command to open the slow query log is as follows:ViewMysql> showvariables like '%slow% ';+---------------------+------