# 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.

#

# You can copy this file to

# /etc/my.cnf to set global options,

# mysql-data-dir/my.cnf to set server-specific options (in this

# installation this directory is /usr/local/mysql/data) or

# ~/.my.cnf to set user-specific options.

#

# 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

default-character-set=utf8

# Here follows entries for some specific programs

# The MySQL server

[mysqld]

port            = 3306

socket          = /tmp/mysql.sock

skip-locking

key_buffer = 512M

max_allowed_packet = 4M

table_cache = 1024

sort_buffer_size = 64M

read_buffer_size = 16M

read_rnd_buffer_size = 32M

myisam_sort_buffer_size = 256M

thread_cache_size = 64

query_cache_size = 32M

join_buffer_size = 512M

# Try number of CPU's*2 for thread_concurrency

thread_concurrency = 8

default-character-set=utf8

datadir=/usr/local/mysql/data

skip-innodb

skip-name-resolve

set-variable=back_log=384

set-variable=wait_timeout=7200

set-variable=interactive_timeout=7200

set-variable=max_connect_errors=2048

set-variable=max_connections=1024

#log-slow-queries        = /var/log/mysql-slow.log

#log=/usr/local/mysql/data/mysql.log

#ndbcluster

#ndb-connectstring=121.194.3.140

# 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

log-bin=mysql-bin

# 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=<host>, MASTER_PORT=<port>,

#    MASTER_USER=<user>, MASTER_PASSWORD=<password> ;

#

#    where you replace <host>, <user>, <password> by quoted strings and

#    <port> 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     =   <hostname>

#

# The username the slave will use for authentication when connecting

# to the master - required

#master-user     =   <username>

#

# The password the slave will authenticate with when connecting to

# the master - required

#master-password =   <password>

#

# The port the master is listening on.

# optional - defaults to 3306

#master-port     =  <port>

#

# binary logging - not required for slaves, but recommended

#log-bin=mysql-bin

# Point the following paths to different dedicated disks

#tmpdir         = /tmp/

#log-update     = /path-to-dedicated-directory/hostname

# Uncomment the following if you are using InnoDB tables

#innodb_data_home_dir = /usr/local/mysql/data/

#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend

#innodb_log_group_home_dir = /usr/local/mysql/data/

#innodb_log_arch_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 = 384M

#innodb_additional_mem_pool_size = 20M

# Set .._log_file_size to 25 % of buffer pool size

#innodb_log_file_size = 100M

#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

# Remove the next comment character if you are not familiar with SQL

#safe-updates

[isamchk]

key_buffer = 256M

sort_buffer_size = 256M

read_buffer = 2M

write_buffer = 2M

[myisamchk]

key_buffer = 256M

sort_buffer_size = 256M

read_buffer = 2M

write_buffer = 2M

[mysqlhotcopy]

interactive-timeout

附2：my.cnf(2G内存调优配置)

# 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.

#

# You can copy this file to

# /etc/my.cnf to set global options,

# mysql-data-dir/my.cnf to set server-specific options (in this

# installation this directory is /var/lib/mysql) or

# ~/.my.cnf to set user-specific options.

#

# 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 = /var/lib/mysql/mysql.sock

# Here follows entries for some specific programs

# The MySQL server

[mysqld]

port = 3306

socket = /var/lib/mysql/mysql.sock

skip-locking

#back_log=100

back_log=200

#key_buffer=500M

key_buffer=512M

#key_buffer = 384M

#max_allowed_packet = 2M

#max_allowed_packet = 1M

max_allowed_packet = 4M

#table_cache = 512

table_cache = 1024

#sort_buffer_size=32M

#sort_buffer_size = 2M

sort_buffer_size = 16M

#read_buffer_size = 8M

#read_buffer_size = 2M

read_buffer_size = 16M

#read_rnd_buffer_size = 16M

#read_rnd_buffer_size = 8M

read_rnd_buffer_size = 32M

#myisam_sort_buffer_size = 256M

myisam_sort_buffer_size = 64M

#thread_cache =80

thread_cache = 8

#query_cache_size = 64M

#query_cache_size = 32M

query_cache_size = 16M

log-slow-queries=/var/log/slowlog.log

long_query_time = 2

# Try number of CPU's*2 for thread_concurrency

thread_concurrency = 4

default-character-set=utf8

### mysql tuning

#set-variable = max_user_connections=600

set-variable = max_user_connections=1000

set-variable = max_connections=1000

#set-variable = table_cache=1200

#set-variable = max_allowed_packet=1M

#set-variable = max_connect_errors=999999

#set-variable = max_connect_errors=20

set-variable = max_connect_errors=1000

set-variable = wait_timeout=10

#set-variable = interactive_timeout=300

set-variable = interactive_timeout=120

#set-variable = tmp_table_size = 2M

#set-variable = join_buffer_size = 2M

###

# 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

# log-bin = /var/log/mysql/mysql-bin.log

# binlog-do-db = exampledb

# 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=<host>, MASTER_PORT=<port>,

# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;

#

# where you replace <host>, <user>, <password> by quoted strings and

# <port> 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 = <hostname>

#

# The username the slave will use for authentication when connecting

# to the master - required

#master-user = <username>

#

# The password the slave will authenticate with when connecting to

# the master - required

#master-password = <password>

#

# The port the master is listening on.

# optional - defaults to 3306

#master-port = <port>

#

# binary logging - not required for slaves, but recommended

log-bin

binlog-do-db = hompy_mweb

# Point the following paths to different dedicated disks

#tmpdir = /tmp/

tmpdir = /var/mysqltmp

#log-update = /path-to-dedicated-directory/hostname

# Uncomment the following if you are using BDB tables

#bdb_cache_size = 384M

#bdb_max_lock = 100000

# Uncomment the following if you are using InnoDB tables

#innodb_data_home_dir = /var/lib/mysql/

#innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend

#innodb_log_group_home_dir = /var/lib/mysql/

#innodb_log_arch_dir = /var/lib/mysql/

# You can set .._buffer_pool_size up to 50 - 80 %

# of RAM but beware of setting memory usage too high

#innodb_buffer_pool_size = 384M

#innodb_additional_mem_pool_size = 20M

# Set .._log_file_size to 25 % of buffer pool size

#innodb_log_file_size = 100M

#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

# Remove the next comment character if you are not familiar with SQL

#safe-updates

default-character-set=utf8

[isamchk]

key_buffer = 256M

sort_buffer_size = 256M

read_buffer = 2M

write_buffer = 2M

[isamchk]

key_buffer = 256M

sort_buffer_size = 256M

read_buffer = 2M

write_buffer = 2M

[myisamchk]

key_buffer = 256M

sort_buffer_size = 256M

read_buffer = 2M

write_buffer = 2M

[mysqlhotcopy]

interactive-timeout