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Tags: ons slist number partition full table scan nts ges OTA htmFirst, 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 exported to a file, the analysis process is the parameters of the query statement, and then the parameterized query after the grouping statistics,

Tags: query log slow file ace log mysql open-res queryFirst, IntroductionTurn on the slow query log, you can let the MySQL record query over a specified time of the statement, through the location analysis of performance bottlenecks, to better optimize the performance of the database system.Second, parameter descriptionSlow_query_log Slow Query Open statusSlow_qu

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 or studied, and some optimizations are made to MySQL, starting with the configuration and adjusting the index.The first step should be to troubleshoot the problem and find the bottleneck, so start with the logturn on

MySQL enables the log-slow-queries Method for slow query, logslowqueries A page of a common WEB site often needs to query n SQL statements to get the PAGE result. When the Website access speed is slow and the front-end has done a lot of optimization work, searching for database bottlenecks is also an important part of WEB optimization.MySQL provides a

Label:MySQL's "slow query" refers to an SQL statement that exceeds the maximum allowable query time ( long_query_time ), and the "unused index" query, by definition, is the SQL statement that the query statement does not use to the index.Slow query configuration and useAdd the following parameters to the Msyqld startup configuration file or command line parameters Long_query_time=1 Log-slow-qu

1. Samsung S6 Edge Slow motion in the mobile phone's "camera", we click on the desktop camera can enter.2. In the camera this we click on "mode" as shown below.3. In the mode interface you will see a lot of options, we click on "Slow motion."4. OK, let's click on the "Record" button to start recording.5. When the recording is complete, click the "Stop" button.6. All right, we took the

A common web site often need to query n SQL statements to get the results of the page, when the Web site access speed is slow and the front-end done a lot of optimization work, the database bottleneck of the search is also an important part of the Web optimization.MySQL provides a slow query logging function, you can query the SQL statement time is greater than the number of seconds to write to the

Analysis of MySQL Slow log is the operation of the work, not less. To quickly locate slow SQL, and to optimize SQL after discovery and to modify the business, ensure that the database works stably and efficiently. Here is my work to solve the idea ...1. View local database slow log files first650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/4B/F1/wKioL1