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I am using MySQL 5.1.35 database on Linux Centos.
The Linux server has 2GB RAM with 14GB of disk space.
I have created webservices using Restlet framework in Java which has thousand user access.
I want to set max_connection for maximum concurrent connections.
So please suggest me that what max_connection should I set?
Thanks in advance.
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As you could see, the MySQL server hostname is Localhost. Localhost means the MySQL database is running on the same server as the website.
If clients encounter Too many connections errors when attempting to connect to the mysqld server, all available connections are in use by other clients. The permitted number of connections is controlled by the max_connections system variable. To support more connections, set max_connections to a larger value.
The MySQL “Too many connections” error occurs when more queries are sent to a MySQL database than can be processed. The error can be fixed by setting a new number of maximum connections in the configuration file or globally.
You need to calculate the memory required by your MySQL engine. See manual here
If you are using MYISAM tables then you can calculate memory requirement using following formula:
key_buffer_size + (read_buffer_size + sort_buffer_size) * max_connections = K bytes of memory
Ideally this should not exceed 2 GB in your case.
Configuration parameters depends on type of your application and querys, but standard values for you could be:
key_buffer_size = 1024MB + (read_buffer_size = 1MB + sort_buffer_size = 4MB) * 200 ~= 2GB
key_buffer_size is a global variables whereas read_buffer_size and sort_buffer_size are session level parameters.
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