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Enable slow log There are two activation methods: 1. In my. cnf, log-slow-queries [= file_name]2. When the mysqld process is started, specify the five common tools to be compared using the -- log-slow-queries [= file_name] Option. Mysqldumpslow, mysqlsla, myprofi, mysql-explain-slow-log, mysqllogfilterMysqldumpslow is

This article describes how to query logs and slow query logs in MySQL. It also describes how to use the Mysqldumpslow log analysis tool that comes with MySQL. For more information, see I. query logs Query all the queries in MySQL by using "-- log [= file_name. Because all the queries, including all the select statements, are recorded, and the size is relatively large, it also has a great impact on the performance after enabling them. Therefore, pleas

Tags: share track picture ack purge backup LED option integrationObjectiveThe log of the database is a strong basis for helping the database administrator to track the various events that have occurred in the database before. MySQL provides error log, Binlog log (binary log), investigate log, slow query log. Here, I seek to solve the following question: What is the purpose of each log? How to control these logs? How do I use the information provided b

Tags: large number of SQL statements OTA results mysql SRC coverage output EFIInstalling MysqlslaSource Path: https://github.com/daniel-nichter/hackmysql.comSource Storage Path:/USR/LOCAL/SRC1. Get the source codeIf you don't have a git command, install git firstYum Install Gitcd/usr/local/srcgit clone https://github.com/daniel-nichter/hackmysql.com.gitcp-Rf hackmysql.com/opt /mysqlmonitorcd/opt/mysqlmonitor/mysqlslaperl makefile.plmake make installExecution Result:/usr/bin/perl-mextutils::my-e

Mysqlsla is a MySQL log analysis tool launched by hackmysql.com, which is very powerful. Data reports are very useful for analyzing the causes of slow queries, including frequency of execution, amount of data, query consumption, etc.First, use 1 # mysqlsla -lt slow mysql-slow.log Or 1 # mysqlsla -lt slow mysql-

Tags: read slow log Mon-binary third-party Linux div full SQL databaseThe slow query log of the MySQL database is an important tuning auxiliary log, but the log format of the MySQL default record is not friendly enough to read, which is determined by the MySQL logging rule, capturing one record, although the recorded information is sufficiently detailed, But if browsing the

Briefly:The method of analyzing the performance of MySQL statement query in addition to using the EXPLAIN output execution plan, you can also let the MySQL record query over a specified time of the statement, we will exceed the specified time of the SQL statement query is called "Slow query."It records all SQL statements that execute more than long_query_time time, helping you to find SQL that executes slowly, so we can optimize these SQL.In the optim

Configure and use MySQL slow query logs ., Mysql query log MySQL slow query log provides query information that exceeds the specified time threshold, and provides a major reference for performance optimization. It is a very practical function,The enabling and configuration of MySQL slow query logs is very simple. You can specify the recorded files (or tables) an

Built a WordPress site, found that the speed is too slow, mainstream optimization is only to reduce the plug-ins, static resource optimization, Web page static and so on, but for a plug-in, using the default theme, PHP file itself request 1 seconds more (not including the resource file loading), this normal? Is this pot WP or PHP? Did not look at the WordPress code (because PHP is not very familiar with), but looked at the WP database, found that a fe

Slow query: the query time of an SQL statement exceeds the predefined query time. These statements must be recorded for statement optimization. The following describes how to record slow queries. Slow query: the query time of an SQL statement exceeds the predefined query time. These statements must be recorded for statement optimization. The following describes h

Some developers, especially those who have contact with mysql, may encounter slow mysql queries. Of course, I am referring to a large data volume of millions or tens of millions, not dozens of times, next, let's take a look at the solution to slow queries. Some developers, especially those who have contact with mysql, may encounter slow mysql queries. Of course,

Monitor SQL statement execution efficiency based on mysql slow log Monitor SQL statement execution efficiency based on mysql slow logs Enable 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

When and how to enable MySql logs in the blog at the front end We learned how to enable MySql slow query logs. Today, let's take a look at how to read these slow query logs. When and how to enable MySql logs in the blog at the front end We learned how to enable MySql slow query logs. Today, let's take a look at how to read these

And the tool comes with similar SQL statement to heavy function, can be sorted according to the specified way (such as the analysis of slow query log, so that it according to the SQL statement execution time reverse sorting, can easily locate the problem) +-------------installation Mysqlsla slow query log analysis tool-------------+ Copy Code code as follows: Yum-y Install Perl-extutils-cbui

Tags: create empty engine Inno tar current from Insert globalFirst, the concept part: As the name implies, the slow query log is a long execution of query, which is what we often call slow query, by setting--log-slow-queries[=file_name] to open the function and set the record location and file name, The default file name is Hostname-slow.log, and the default dire

In front of the blog "when, how to open the MySql log?" ", we learned how to enable the slow query log for MYSQL. Today we look at how to read these slow query logs. Before tracing the slow query log. First you have to make sure that there is a slow query at least once. Suppose you are not able to make one yourself:

Tags: style blog http color io os using AR forMysqlsla is a feature that helps with parsing, filtering, and sorting of MySQL slow query logs, binary logs, and more. Overall, the functionality is very powerful. can make SQL query data report, analysis including execution frequency, data volume, query consumption and so on. And the tool comes with similar SQL statement to the function, can be sorted according to the specified way (for example, when anal

Label:1, configuration on Linux: Added in MySQL config file my.cnf Log-slow-queries=/var/lib/mysql/slowquery.log (Specify the log file location, can be empty, the system will give a default file Host_name-slow.log)long_query_time=2 (record over time, default is 10s)Log-queries-not-using-indexes (log down without using the indexed query, depending on the situation to decide whether to open)Log-long-format (if set, all queries that do not use the index

MySQL index principle overview and slow query optimization practices MySQL has become the preferred relational database for most Internet companies thanks to its outstanding performance, low cost, and rich resources. Although the performance is outstanding, the so-called "good horse with good saddle", how to better use it, has become a required course for development engineers, we often see requirements from job descriptions such as "proficient in MyS

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 SQL statement query that exceeds the specified time is called "Slow query ". It records all SQL statements that have been executed longer than long_query_time, a