# Example MySQL config file for very large systems.
#
# This is for a large system with memory of 1G-2G where the system runs mainly
# MySQL.
#
# MySQL programs look for option files in a set of
# locations which depend on the deployment platform.
# You can copy this option file to one of those
# locations. For information about these locations, see:
# http://dev.mysql.com/doc/mysql/en/option-files.html
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the “–help” option.

# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /tmp/mysql.sock

# Here follows entries for some specific programs

# The MySQL server
[mysqld]
port = 3306
socket = /tmp/mysql.sock
skip-external-locking
skip-name-resolve // 사용시 mysql 지연현상 줄일수있씀.
key_buffer_size = 8G // RAM에 50~80%사용 DB서버로만사용시
max_allowed_packet = 64M //
table_open_cache = 1024 //
sort_buffer_size = 2M
read_buffer_size = 2M //
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 64M //
thread_cache_size = 8
query_cache_size = 32M
# Try number of CPU’s*2 for thread_concurrency
thread_concurrency = 16

# Don’t listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the “enable-named-pipe” option) will render mysqld useless!
#
#skip-networking

# Replication Master Server (default)
# binary logging is required for replication
slow-query-log=/usr/local/mysql/data/mysql-slow.log //슬로우 쿼리발생시 로그남김
long_query_time = 2 //슬로우쿼리 지연시간
log-bin=mysql-bin //mysql – bin 로그 남김

max_connections=20000 //최대 커넥션값. 미리 설정해놓음.
wait_timeout = 60 //쿼리 발생시 발생후 60초 까지 아무런작업이없쓰면 연결을 끊음.

# required unique id between 1 and 2^32 – 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1

# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) –
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=, MASTER_PORT= ,
# MASTER_USER=, MASTER_PASSWORD= ;
#
# where you replace , , by quoted strings and
# by the master’s port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST=’125.564.12.1′, MASTER_PORT=3306,
# MASTER_USER=’joe’, MASTER_PASSWORD=’secret’;
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables’ values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 – 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave – required
#master-host =
#
# The username the slave will use for authentication when connecting
# to the master – required
#master-user =
#
# The password the slave will authenticate with when connecting to
# the master – required
#master-password = #
# The port the master is listening on.
# optional – defaults to 3306
#master-port = #
# binary logging – not required for slaves, but recommended
#log-bin=mysql-bin
#
# binary logging format – mixed recommended
#binlog_format=mixed

# Uncomment the following if you are using InnoDB tables // innodb사용시 옵션확인
innodb_data_home_dir = /usr/local/mysql/data //위치
innodb_data_file_path = ibdata1:500M;ibdata2:500M;ibdata3:500M;ibdata4:500M;ibdata5:500M;ibdata6:500M:autoextend
//ibdata같은경우 디폴드값말고, 500매가씩 여러개를 만들어서 활용하는것이 read속도를 높일수있다. 아래 autoextend 옵션을 지우지말것! 자동으로 용량 늘리는 옵션임.
innodb_log_group_home_dir = /usr/local/mysql/data
# You can set .._buffer_pool_size up to 50 – 80 %
# of RAM but beware of setting memory usage too high
innodb_buffer_pool_size = 8G
innodb_additional_mem_pool_size = 64M
# Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 1G
innodb_log_buffer_size = 64M
innodb_flush_log_at_trx_commit = 0 //리플리케이션사용시 1
innodb_flush_method = O_DSYNC //이옵션 중요..머지..??
innodb_lock_wait_timeout = 50

innodb_write_io_threads = 4
innodb_read_io_threads = 4
innodb_thread_concurrency = 16
innodb_log_files_in_group = 3

[mysqldump]
quick
max_allowed_packet = 64M

[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates

[myisamchk]
key_buffer_size = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout