mysql query optimizer tool online

[MySQLSlowlog] correctly and securely clear the online slow query log slowlog process [MySQLSlowlog] correct and secure clearing of the online slow query log slowlog process _ MySQL 1. see the slow log status; mysql> show variab

Slow Query Optimization of MySQL is a common topic. This article describes the actual problems encountered in the production database and provides examples. Enable slow query supportFirst, activate the slow query log, modify the my. CNF configuration file, and add the following options:Log-Slow-queries = slow. LogLong_

1, the slow log status; Mysql> Show variables like '%slow% ';+---------------------+------------------------------------------+| variable_name | Value |+---------------------+------------------------------------------+| log_slow_queries | On || Slow_launch_time | 2 || Slow_query_log | On || Slow_query_log_file | /mysqllog/slow_log/slow_queries_3306.log |+---------------------+------------------------------------------+4 rows in Set (0.00 sec) 2, sto

FALSE Also, if you want to query how many slow query records you have, you can use system variables.Log Analysis Tool MysqldumpslowIn a production environment, if you want to manually analyze logs, find and analyze SQL, it is obviously a physical activity, MySQL provides log analysis

Instance 1. Obtain the MYSQL versionInstall mysql in windows for python Development Download the EXE Installation File in MySQL-python Windows Copy codeThe Code is as follows: #-*-coding: UTF-8 -*- # Install mysql db for pythonImport MySQLdb as mdb Con = None Try:# Method for connecting to

Development write a few statements, think the query results and logic a bit inconsistent, get here together to analyze the next.The statements are as follows:SelectTp.title, Tp.amount,ifnull (sum( Case whenTu.type= 1 ThenTi.invest_amountElse 0 End),0) asAinvestamount,ifnull (sum( Case whenTu.type= 2 ThenTi.invest_amountElse 0 End),0) asBinvestamount,ifnull (sum( Case whenTu.type= 3 ThenTi.invest_amountElse 0 End),0) asCinvestamount fromT_invest

MySQL Performance Profiling Tool (pt-query-digest) is also from percona-toolkit Other tools in this tool set Troubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart) Including 1. slow log (default) 2. tcpdump 3. general log 4. binlog 5. show processlist Th

MySQL table design Query I'm so confused, I can't get around this bend. I have two tables, the T1 table stores the data, and the T2 table stores the Chinese names of T1 field fields. T1 T2 table Now you want to write an SQL statement, you can find out the T1 table ID in (1,2,3,4,5) of the records of each field value and replace the field name to the T2 table corresponding to the text field n

organized two articles, Inadvertently found a tool to view the slow query log: mk-query-digest, the tool online is known as MySQL DBA must master the top ten tools. 1: Installation of Perl-related modules Yum install perl-DBI y

BKJIA comprehensive report] Sun announced a major version update for the MySQL Enterprise subscription service. Sun has added a Query and analysis tool MySQL Query Analyzer for the MySQL Enterprise Edition to help track and analyz

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://isadba.com /? P = 82 or reference http://isadba.com /? P = 572 and then download Anemometer git clonehttps: // github.com/box First install LNMP environment, require PHP-5.3 version or above.Reference :? P = 82 or reference? P = 572 Then down

=1000 # default: 0# Log slow OPTIMIZE TABLE, ANALYZE TABLE, and ALTER TABLE statements# log-slow-admin-statements# Log slow queries executed by replication slaves (>= 5.1.21)# log-slow-slave-statements# MySQL 5.1.6 through 5.1.20 had a default value of log-output=TABLE, so you should force# Attention: logging to TABLE only includes whole seconds informationlog-output=FILE## Admin query for

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 i

Tags: Table DBA Revoke administration Tool display limit CAL custom restDBA DAY04One, multi-table querySTU_ID Name ClassPayment FormClass tableScore TableEmployment Chart1.1 Copy Table (function: Backup table, quick build table)Mysql> CREATE TABLE table name SQL query; CREATE database DB4;Use DB4;CREATE TABLE User2 SELECT * from Db3.user;Show tables;SELECT * from

MySQL performance profiling tool (pt-query-digest) This tool is also from percona-toolkitOther tools in this tool setTroubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart)Verify

The slow query log of mysql database is a very important auxiliary log for tuning. However, the log format recorded by mysql by default is not friendly enough to read. This is determined by the mysql Logging rules, capture one log. Although the recorded information is detailed enough, reading slow

MySQL slow query log analysis tool mysqldumpslow Mysqldumpslow is a log analysis tool that comes with mysql. As the name suggests, mysqldumpslow is used to query SQL statements that are slow in

In windows, mysql5620 used mysqldumpslowpl to analyze slow logs. Today, we see a tool pt-query-digest, which was originally intended to be installed and used on windows. The result is to run C on windows: before ProgramFilesMySQLMySQLServer56b, mysql5.6.20 in windows used mysqldumpslow. pl analyzes slow logs. Today, we see pt-query-digest, which was originally in

First, IntroductionMysqlsla is a tool for analyzing the MySQL slow log , which analyzes the reasons for slow queries, including the number of times a SQL is executed and the percentage of slow log data, execution time, waiting time, and so on. The company's database has a lot of slow query logs, resulting in a high system load, and

In MySQL5.1 slow query logs, slow queries without indexes are the same as those with indexes. To prevent slow queries without indexes from being recorded in slow query logs, use -- log In slow query logs of MySQL 5.1, slow queries without indexes are the same as those with indexes. To prevent slow queries without index