Correct modification of the maximum number of MySQL connections

The following articles mainly introduce three useful methods for correctly modifying the maximum number of MySQL connections. We all know that after the MySQL database is installed, the default MySQL database has a maximum number of connections of 100, generally, the number of connections to a forum or website with a slightly larger traffic is far from enough. There are two ways to increase the default number of connections to MySQL. Method 1: Enter

The following articles mainly introduce three useful methods for correctly modifying the maximum number of MySQL connections. We all know that after the MySQL database is installed, the default MySQL database has a maximum number of connections of 100, generally, the number of connections to a forum or website with a slightly larger traffic is far from enough. There are two ways to increase the default number of connections to MySQL. Method 1: Enter

The following articles mainly introduce three useful methods for correctly modifying the maximum number of MySQL connections. We all know that after the MySQL database is installed, the default MySQL database has a maximum number of connections of 100, generally, the number of connections to a forum or website with a slightly larger traffic is far from enough. There are two ways to increase the default number of connections to MySQL.

Method 1:

Go to the MySQL installation directory and open the MySQL configuration file my. ini or my. cnf to find max_connections = 100 and change it to max_connections = 1000 to restart MySQL.

Method 2:

The maximum number of connections to MySQL is 100 by default. Client Logon:

 
 

  
  
MySQL -uusername -ppassword 
 
 

Set the maximum number of new MySQL connections to 200:

 
 

  
  
MySQL> set GLOBAL max_connections=200 
 
 

Display the currently running Query:

 
 

  
  
MySQL> show processlist 
 
 

Display Current status:

 
 

  
  
MySQL> show status 
 
 

Exit the client: MySQL> exit

View the maximum number of connections to MySQL: MySQLadmin-uusername-ppassword variables

Method 3:

Take MySQL 5.0.33 in centos 4.4 as an example:

 
 

  
  
vi /usr/local/MySQL/bin/MySQLd_safe 
 
 

Find safe_MySQLd and edit it. Find the two lines started by MySQLd and add the following parameters:

 
 

  
  
-O max_connections=1500 
 
 

The specific point is the following position:

Note in Red:

 
 

  
  
then $NOHUP_NICENESS $ledir/$MySQLD 
  
  
$defaults --basedir=$MY_BASEDIR_VERSION 
  
  
--datadir=$DATADIR $USER_OPTION 
  
  
--pid-file=$pid_file 
  
  
--skip-external-locking 
  
  
-O max_connections=1500 
  
  
>> $err_log 2>&1 else 
  
  
eval "$NOHUP_NICENESS $ledir/$MySQLD 
  
  
$defaults --basedir=$MY_BASEDIR_VERSION 
  
  
--datadir=$DATADIR $USER_OPTION 
  
  
--pid-file=$pid_file 
  
  
--skip-external-locking $args 
  
  
-O max_connections=1500 >> 
  
  
$err_log 2>&1" 
 
 

Save.

 
 

  
  
# service MySQLd restart 
  
  
# /usr/local/MySQL/bin/MySQLadmin -uroot -p variables 
 
 

Enter the password of the root database account.

Max_connections 1500 indicates that the new change has taken effect.

There is another method,

Modify the original code:

Unlock the original MySQL code and go to the SQL directory to modify MySQLd. cc. Find the following line:

 
 

  
  
{"max_connections", OPT_MAX_CONNECTIONS, 
  
  
"The number of simultaneous clients allowed.", (gptr*) &max_connections, 
  
  
(gptr*) &max_connections, 0, GET_ULONG, REQUIRED_ARG, 100, 1, 16384, 0, 1, 
  
  
0}, 
 
 

Change it:

 
 

  
  
{"max_connections", OPT_MAX_CONNECTIONS, 
  
  
"The number of simultaneous clients allowed.", (gptr*) &max_connections, 
  
  
(gptr*) &max_connections, 0, GET_ULONG, REQUIRED_ARG, 1500, 1, 16384, 0, 1, 
  
  
0}, 
 
 

Save the disk and exit./configure; make install to achieve the same effect. The above content is an introduction to the three methods for modifying the maximum number of connections of MySQL. I hope you will find some gains.