slow query

Recently found a very useful MySQL slow query log visualization tools, online can also find a lot of information, here combined with their own actual situation to reorganize.1. Experimental environment 1.1 system environment:操作系统：CentOS 6.5 64位主机地址：1

Linux View MySQL installation pathFirst, view the file installation pathSince there is more than one place to install the software, all the paths (addresses) that are first said to view the file installation.Take MySQL for example here. For example,

If you ' re just completely itching to start using the This tool, here's what you need:1, a MySQL database to store query analysis data in.2, Pt-query-digest. You could as well just get the whole Percona Toolkit when you ' re at it:)3, a slow query

Opening the general log will log all SQL statements that arrive at MySQL server. Generally does not open the function, because the amount of log can be very large. However, in some cases, the general log may be temporarily opened for use by a

MySQL Server has four types of logs--error log, General Query log, Binary log, and Slow query log.The first one is the error log, which records some of the mysqld errors. The second is the general query log, which records what MYSQLD is doing, such

MySQL Slow query:Check if log on slow query is turned on: Show variables like ' log_slow_queries '; View SQL that is slower than how many seconds are logged to the log file: Show variables like ' long_query_time '; Configure Logging

in a production environment, DB servers are often hung by concurrent slow queries, so it is important to do SQL audits beforehand to avoid bad SQL. Wan accidentally slow SQL or run to the line, and concurrency is not small, this is the DBA will

[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 variables like '%slow%';+-

MySQL slow query can help us optimize the efficiency of the MySQL database. The following describes how to enable MySQL slow query to find SQL statements that affect the efficiency. During website operation, the website may suddenly slow down. In

MySQL5.6 how to optimize slow query SQL statements -- Introduction to slow logs Recently, a development team complained that the mysql cluster included in our platform was not good and always reported the "heartbeat Error" of mysql and analyzed the

MySQL slow query supports setting bitsCN.com in milliseconds MySQL slow query supports millisecond settings MySQL slow query itself does not support the ms level (requires patching), but for MySQL 5.21 +, the minimum value of long_query_time is 0

Mysql (slow-query) quick method for enabling slow log query bitsCN.com How to quickly enable slow log query in mysql (slow-query) Mysql has a function to log down and run slow SQL statements. by default, this log does not exist. Open my. ini, find

Before explaining this problem, we should first point out two related backgrounds: 1. MySQL temporary tables are all MyISAM. 2. The total number of records in the MyISAM table is stored additionally. count (*) Before explaining this problem, we

Today, the parsing service throws a timeout exception during querying of Redis's set data, and the method that produces the exception is:Db. Setmembers (key);The result of this API is to specify all the KV objects within the set, and the only way to

Author: those things |ArticleCan be reproduced. Please mark the original source and author information in the form of a hyperlink Web: http://www.cnblogs.com/panfeng412/archive/2013/06/08/hbase-slow-query-troubleshooting.html Recently, the hbase

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

MySQL database converts int to varchar for slow query, mysqlvarchar Two slow queries are processed in the last week because the int type cannot be converted to varchar. CREATE TABLE `appstat_day_prototype_201305` (`day_key` date NOT NULL DEFAULT '190

1,Https://github.com/Meituan-Dianping/SQLAdvisor/blob/master/doc/QUICK_START.mdhttp://www.ttlsa.com/mysql/meituan-sql-optimization-tool-sqladvisor/Enter the command in the MySQL client:Show variables like '%quer% ';The options for the red box

What is the slow query log for MySQL? Definition: MySQL provides a logging function to record the MySQL corresponding time over the long_query_time value of the SQL statement, long_query_time default value of 10 seconds, the corresponding time of

Instant Analysis:Show full percesslist;Turn on the slow query log and analyze the log records:Long_query_time = 1Log-slow-queries =/data/3306/slow.logLog_queries_not_using_indexesSplit log sent to mailboxAdd explain to see how the statement is