slow query log

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

Document directory 17.2.1 start and set binary logs 17.2.2. View binary logs 17.2.3 Delete binary logs 17.2.4. Restore the database using binary logs 17.2.5. temporarily disable the binary log function. 17.3.1. Start and set error logs 17.3.

MySQL Log System details All those who have done large systems know that the log function is not to be underestimated. In the middle and late stages of the project, the optimization and upgrade of the project are based on the log to make the upgrade

Today, developers continue to develop and deploy applications that use the lamp (Linux?, Apache, MySQL, and Php/perl) architectures. However, server administrators often have little control over the application itself, because the application is

Today, developers continue to develop and deploy applications that use lamp (linux®, Apache, MySQL, and Php/perl) architectures. However, server administrators often have little control over the application itself, because the application is written

First, the optimization operation of common database1, the design of the table to conform to the three paradigms.2, add the appropriate index, the index has a large impact on the query speed, you must add an index. Primary key index, unique index,

The article "Small and medium-sized team quickly build SQL Automatic Audit system" We completed the automatic audit and implementation of SQL, not only improve the efficiency is also by the colleague's affirmation, the heart flattered. But the

First, optimize the classificationSecond, sample test dataRefer to MySQL's official Sakina database.Third, use the MySQL slow query log to monitor the efficiency problem of SQLThe first one, turn on the slow query log. The second, slow query log

ObjectiveUsing anemometer to visualize the MySQL slow query log, you can more easily query the slow query log, and based on the time stamp of historical query. The following is a stand-alone version of the Anemometer deployment demonstration, in

If you are a web developer. If you want to debug your app or improve its performance, you need to go to a variety of log files. Logging is the best choice to start troubleshooting. As far as the famous MYSQL database server is concerned, you need to

PrefaceThis article summarizes several MySQL database logs, for the daily maintenance process problem solving and performance optimization, a slightly more basic, daily accumulation of use.Part of the article will be the MySQL database and the SQL

Turn from:MySQL Database Optimization technology configuration Chapter, index chapter (must see must SEE)(i)Reduce database accessAs static as possible for pages that can be staticallyStatic local to a dynamic page, using staticSome data can be

I. Environment OS: CentOS release 5.8 (64-bit) DB: MySQL5.5.17 Ii. Operations Run the rm-f command to delete the slow query log. Iii. Problems The slow query log is not automatically generated. (if there is a backup, it is difficult to copy it

MySQL slow Query 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

1 Slow query definitionMySQL records all SQL statements that execute a time threshold that exceeds the Long_query_time parameter setting. The slow query log is the log that logs these SQL. 2 Open Slow query logLocate the MySQL configuration file my.

MySQL slow query log is useful for tracking problematic queries, can be analyzed in the current program has a very resource-intensive SQL statement, that how to open MySQL slow query log records it? In fact, open MySQL slow query log is simple,

The log files described here are files of the MySQL database itself, regardless of what storage engine is specifically used. Error log MySQL's error log is similar to Oracle's Alert.log, which ends with. Err by default, and the DBA should first

PrefaceUsing anemometer to visualize the MySQL slow query log, you can more easily query the slow query log, and based on the time stamp of historical query. The following is a stand-alone version of the Anemometer deployment demonstration, in

Slow Query Log1. The slow query log is logged when the query does not return results for a certain amount of time.2. The slow query log helps DBAs find SQL statements that perform inefficiently and help with database optimization efforts.3. The slow

About MySQL TuningThere are 3 ways to speed up the MySQL server, from low to high efficiency:Replace the problematic hardware. Tuning the settings for the MySQL process. Optimize the query.Replacing the problematic hardware is often our first