mysql多实例的配置

初始化数据库
/opt/mysql/scripts/mysql_install_db --basedir=/opt/mysql --datadir=/opt/mysql/data3306 --user=mysql
/opt/mysql/scripts/mysql_install_db --basedir=/opt/mysql --datadir=/opt/mysql/data3307 --user=mysql

多实例配置

vi /etc/my.cnf

[mysqld_multi]   
mysqld = /opt/mysql/bin/mysqld_safe   
mysqladmin = /opt/mysql/bin/mysqladmin   
log = /opt/mysql/log/mysqld_multi.log    
user = root     
password = redhat

3306
[mysqld3306]
basedir = /opt/mysql
datadir = /opt/mysql/data3306
port = 3306
user = mysql
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
event_scheduler = 0

#timeout
interactive_timeout = 300
wait_timeout = 300

#character set
character-set-server = utf8
open_files_limit = 65535
max_connections = 100
max_connect_errors = 100000

#logs
log-output = file
slow-query-log = 1
slow-query-log-file = /opt/mysql/data3306/slow.log
log-error = /opt/mysql/data3306/error.log
log-warnings = 2
pid-file = /opt/mysql/data3306/mysql.pid
long-query-time = 1
#log-slow-admin-statements = 1
#log-queries-not-using-indexes = 1
log-slow-slave-statements = 1

#binlog
binlog_format = mixed
server-id = 10518
log-bin = mybinlog
binlog_cache-size = 4M
max_binlog_size = 1G
max_binlog_cache_size = 2G
sync_binlog = 1
expire_logs_days = 10

#relay log
skip_slave_start = 1
max_relay_log_size = 1G
relay_log_purge = 1
relay_log_recovery = 1
log_slave_updates
#slave-skip-errors = 1032,1053,1062

#buffers & cache
table_open_cache = 2048
table_definition_cache = 2048
table_open_cache = 2048
max_heap_table_size = 96M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 256
query_cache_size = 0
query_cache_type = 0
query_cache_limit = 256K
query_cache_min_res_unit = 512
thread_stack = 192K
tmp_table_size = 96M
key_buffer_size = 8M
read_buffer_size=2M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 32M

#myisam
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1

#innodb
innodb_buffer_pool_size = 1G
innodb_buffer_pool_instances = 1
innodb_data_home_dir = /opt/mysql/data3306
innodb_data_file_path = ibdata1:1G:autoextend
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 64M
innodb_log_file_size = 256M
innodb_log_files_in_group = 2
innodb_max_dirty_pages_pct = 50
innodb_file_per_table = 1
innodb_rollback_on_timeout
innodb_status_file = 1
innodb_io_capacity = 2000
transaction_isolation = READ-COMMITTED
innodb_flush_method = O_DIRECT


#other
autocommit = 0
explicit_defaults_for_timestamp = TRUE
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
[mysqld3307]
basedir = /opt/mysql
datadir = /opt/mysql/data3307
port = 3307
user = mysql
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
event_scheduler = 0


#timeout
interactive_timeout = 300
wait_timeout = 300


#character set
character-set-server = utf8
open_files_limit = 65535
max_connections = 100
max_connect_errors = 100000

#logs
log-output = file
slow-query-log = 1
slow-query-log-file = /opt/mysql/data3307/slow.log
log-error = /opt/mysql/data3307/error.log
log-warnings = 2
pid-file = /opt/mysql/data3307/mysql.pid
long-query-time = 1
#log-slow-admin-statements = 1
#log-queries-not-using-indexes = 1
log-slow-slave-statements = 1


#binlog
binlog_format = mixed
server-id = 10518
log-bin = mybinlog
binlog_cache-size = 4M
max_binlog_size = 1G
max_binlog_cache_size = 2G
sync_binlog = 1
expire_logs_days = 10

#relay log
skip_slave_start = 1
max_relay_log_size = 1G
relay_log_purge = 1
relay_log_recovery = 1
log_slave_updates
#slave-skip-errors = 1032,1053,1062

#buffers & cache
table_open_cache = 2048
table_definition_cache = 2048
table_open_cache = 2048
max_heap_table_size = 96M
sort_buffer_size = 2M
join_buffer_size = 2M
thread_cache_size = 256
query_cache_size = 0
query_cache_type = 0
query_cache_limit = 256K
query_cache_min_res_unit = 512
thread_stack = 192K
tmp_table_size = 96M
key_buffer_size = 8M
read_buffer_size=2M
read_rnd_buffer_size = 16M
bulk_insert_buffer_size = 32M

#myisam
myisam_sort_buffer_size = 128M
myisam_max_sort_file_size = 10G
myisam_repair_threads = 1

#innodb
innodb_buffer_pool_size = 1G
innodb_buffer_pool_instances = 1
innodb_data_home_dir = /opt/mysql/data3307
innodb_data_file_path = ibdata1:1G:autoextend
innodb_flush_log_at_trx_commit = 1
innodb_log_buffer_size = 64M
innodb_log_file_size = 256M
innodb_log_files_in_group = 2
innodb_max_dirty_pages_pct = 50
innodb_file_per_table = 1
innodb_rollback_on_timeout
innodb_status_file = 1
innodb_io_capacity = 2000
transaction_isolation = READ-COMMITTED
innodb_flush_method = O_DIRECT

#other
autocommit = 0
explicit_defaults_for_timestamp = TRUE