How to check and optimize mysql Performance (1/6) _ PHP Tutorial-php Tutorial

Master checks and optimizes mysql Performance (16 ). I have been using the mysql tutorial database tutorial software, which is stable and highly efficient. When encountering severe performance problems, there are usually several possibilities: 1. I have never used the mysql tutorial database tutorial software for indexing, and it works stably and efficiently. There are several possible causes for serious performance problems:

1. The index is not created;
2. SQL statements are too complex;
3. configuration error;
4. the machine cannot be loaded;

1. index not created

If you see that mysql consumes a lot of cpu, you can use the mysql client tool to check.

Run

/Usr/local/mysql/bin/mysql-hlocalhost-uroot-p

Enter the password. if there is no password, you can enter the client interface without the-p parameter.

Check the current running status

Show full processlist

It can be run several times more

This command shows the SQL statement being executed. it informs the executed SQL statement, database name, execution status, client ip address, account used, and running time.

In my cache backend, no SQL statements are displayed most of the time. I think this is normal. If you see a lot of SQL statements, this mysql will certainly have performance problems 1 2 3 4 5 6

Bytes. When encountering severe performance problems, there are generally several possibilities: 1. there is no index...