Example: msql.conf

[client]
port        = 3308 
socket      = /tmp/mysql3308.sock

[mysqld]
port    = 3308
socket  = /tmp/mysql3308.sock
datadir = /usr/local/mysql3308/data
skip-external-locking
key_buffer_size = 32M
max_allowed_packet = 1M
table_open_cache = 128
sort_buffer_size = 768K
net_buffer_length = 8K
read_buffer_size = 768K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
thread_cache_size = 16
query_cache_size = 16M
tmp_table_size = 32M

log-error = /usr/local/mysql3308/mysql3308_error.log
pid-file = /usr/local/mysql3308/mysql3308.pid

explicit_defaults_for_timestamp = true
#skip-networking
max_connections = 100
max_connect_errors = 5
open_files_limit = 65535

log-bin=mysql-bin
binlog_format=mixed
server-id   = 1
expire_logs_days = 10
early-plugin-load = ""

default_storage_engine = InnoDB
innodb_data_home_dir = /usr/local/mysql3308/data
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /usr/local/mysql3308/data
innodb_buffer_pool_size = 128M
innodb_log_file_size = 32M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 32M
sort_buffer_size = 768K
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout