show processlist

Featured Books command: show Processlist;if it is the root account, you can see the current connection for all users. If you are a normal account, you can only see the connection you are occupying. show Processlist; only the first 100 are listed, if

MySQL benchmark Test-sysbench 1. When you benchmark the overall website performance, you can use a variety of tools, such as the well-known AB(Apache load), http_load and other tools. Here we do not care about their use. If you want to know, you can

Run the status command to view the Slow queries item. If the value is greater than 0 for a long time, the query execution time is too long.Copy codeThe Code is as follows:Reference content is as follows:Mysql> status;--------------Mysql Ver 11.18

Description of mysql cpu usage by 100%In the morning, I helped a friend solve the Mysql cpu usage problem of 100%. I sorted it out and recorded the experience in this article. Recently, the CPU usage of MYSQL service process (mysqld-nt.exe) on a

This article is Monty's speech at the o'reilly Open Source Convention 2000 conference, it involves the working principle of MySQL table high-speed cache, MySQL expansion/Optimization-providing faster speed, MySQL index usage, learning to use EXPLAIN,

Run the show processlist command to view the mysql connection count. If the root account is used, you can view the current connections of all users. For other common accounts, you can only view the connections you are using. Www.2cto.com show

I just took the time to perform master-master synchronization for MySQL. Write down the steps and update them at any time for any problems. Here, the database I synchronized is test. 1. Environment Description. HOST: 192.168.0.231 () HOST: 192.168.0.

MySQL Tutorial: Philosophical Thoughts on unauthenticated users Symptom 1 In the production environment, we occasionally encounter connections such as "unauthenticated user", with load at the database server level, high sys cpu, or thread running

Solve the technical notes bitsCN.com for a MySQL server process CPU usage of 100% Description of mysql cpu usage by 100%In the morning, I helped a friend solve the Mysql cpu usage problem of 100%. I sorted it out and recorded the experience in this

Run the "status" command to query running SQL statements in MySQL. if the value of Slow queries is greater than 0 for a long time, the query execution time is too long. The following is a reference clip: 　mysql> status; --------------

MASTER-MASTER cyclic synchronization from the MASTER node of MYSQL to the MASTER node. However, being prepared will have a certain impact on performance! Write down the steps and update them at any time for any problems. Here, the database I

Monty said MySQL optimization (v) 21. working principles of MySQL table high-speed cache Each MyISAM table's open instance uses an index file and a data file. If the table is used by two threads or twice in the same query, MyIASM will share the

This article mainly introduces the summary of practical commands for using percona-toolkit to operate MySQL. percona-toolkit is a powerful MySQL auxiliary tool. For more information, see 1.pt-archiverFunction introduction: Archive the records of

Recently, there was a project requirement to ensure that multiple machines did not obtain the same data. later, we found that the Mysql Query statement used select .. forupdate often leads to database deadlocks. the following small series will

Unless we treat a person with love, we cannot understand him.We never can has a true view of man unless we had a love for him. 1, Connection pool knowledgeThe role of connection pooling: to manage connections and to improve the efficiency

Optimization Methods when Mysql consumes too much CPU (mandatory). mysql is mandatory. When the CPU usage of Mysql is too high, which aspects should we optimize? If the CPU usage is too high, consider the following: 1) In general, to eliminate high

Mysql uses the kill command to solve the deadlock problem (killing an SQL statement being executed) When using mysql to run certain statements, the deadlock is caused by a large amount of data, which is not reflected. At this time, you need to kill

How does MySQL view metadata lock blocking? mysql metadata How does MySQL view metadata lock blocking? Procedure: 1. session 1 execution: start transaction; select *from t1; 2. session 2 is executed after Step 2 is executed: drop table

Showprocesslist; check it and find 10 rows in total. Does it mean that 10 databases are not connected? Can I end the sleep command directly? To connect to the database using php, you need to add mysql_close () to each call. I can see that the Manual

The difference between interactive_timeout and wait_timeout in MySQL is mysqlwaittimeout. When you use the mysql client to operate the database, open the terminal window. If the operation is not performed for a period of time, the following error is