MySQL: Configuration File

When you install MySQL through RPM, before starting the the MySQL process, make sure /etc/my.cnf do exist. And, if it's not, do create one with the basic configuration values.

Below is a sample my.cnf file for a server with InnoDB as the default engine:


[mysqld]
performance_schema
skip-name-resolve
server-id                       = 1
innodb_file_per_table
max_connections                 = 1000
max_allowed_packet             = 512M

slow-query-log                  = 1
slow_query_log_file             = /var/lib/mysql/myServer_slow.log

sort_buffer_size                = 32M
read_buffer_size                = 32M
read_rnd_buffer_size            = 16M
join_buffer_size                = 32M

# innodb parameters
tmpdir                          = /var/lib/mysql
datadir                         = /var/lib/mysql
innodb_data_home_dir            = /var/lib/mysql
innodb_data_file_path           = ibdata1:10M:autoextend
innodb_log_group_home_dir       = /var/lib/mysql
innodb_log_files_in_group       = 2
innodb_buffer_pool_size         = 40G
innodb_additional_mem_pool_size = 64M
innodb_log_buffer_size          = 32M
innodb_log_file_size            = 2047M
innodb_change_buffering         = inserts
innodb_flush_method             = O_DIRECT


# parameters added for thread cache size, wait time out, interactive timeout and table open cache
wait_timeout                    = 28800
interactive_timeout            = 28800
table_open_cache               = 2000
thread_cache_size              = 1000

[mysql]
max_allowed_packet              = 512M



The explanations of these variables..I think I'll do in next posts..