In MySQL, the maximum connections setting refers to the maximum number of concurrent connections that the database server can accept from clients. It determines the number of simultaneous users or applications that can connect and interact with the database at any given time.
Setting an appropriate value for max connections is essential to ensure optimal performance and prevent server overload. If the value is set too low, it may result in connection errors for users trying to access the database. On the other hand, setting it too high can consume excessive system resources, leading to performance degradation.
The optimal value for max connections depends on factors such as available system resources, expected traffic, and the nature of the application. It is important to carefully analyze and tune this setting to strike a balance between resource utilization and user concurrency for efficient MySQL operations.
While typically a site can be optimized to reduce the number of concurrent connections from users, in some cases the maximum number of connections in MySQL may need to be increased for a site. As this does require root access, this can only be modified on VPS or dedicated hosting. On shared hosting, the maximum user connections are limited to 20 and this cannot be modified.
Adjust Limits
IMPORTANT: This solution will require root access. If this needs to be obtained, follow the guide on requesting root access.
- SSH into the server as root
- Review the current limits by running
cat /etc/my.cnf | grep conn
- Adjust the limits as needed
- Edit the
/etc/my.cnf
file using your preferred text editor
EXAMPLE:nano /etc/my.cnf
- Locate the
max_connections
ormax_user_connections
entry - Update the value to the new maximum
EXAMPLE:max_user_connections=150
- Save the file
TIP: Using nano, this can be done by pressing <Ctrl+X> to exit and then agreeing to save the file with <Y>. - Restart MySQL by running
/scripts/restartsrv_mysql
- Edit the
Comments
0 comments
Article is closed for comments.