centos 5 mysql 5.5.31 แรม 16 G ค่ะ my.cnf ที่ใช้อยู่ค่ะ
[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
#basedir = /var/lib/mysql
#datadir = /var/lib/mysql/data
default-character-set=tis620
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
#skip-locking
skip-external-locking
#default_table_type=INNODB
key_buffer = 1G
max_allowed_packet = 1073M
table_cache = 1000
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
max_heap_table_size = 100M
myisam_sort_buffer_size = 128M
thread_cache = 8
query_cache_size= 1G
query_cache_type= 2
join_buffer_size=2M
thread_concurrency = 8
#default-character-set=tis620
character-set-server=tis620
skip-name-resolve
innodb_file_per_table
skip-character-set-client-handshake
init_connect = 'SET NAMES tis620'
max_connections = 200
event_scheduler = 0
#log-bin=mysql-bin
#binlog_format=mixed
######################################## 5.1.25--->X cpu multicore
#innodb_thread_concurrency = 0
########################################
innodb_data_home_dir = /var/lib/mysql/
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /var/lib/mysql/
############################# mysql 5.1.X
#innodb_log_arch_dir = /var/lib/mysql/
#############################
#############################
# add rc.local ---> ulimit -n 30000
#############################
innodb_buffer_pool_size = 12G
innodb_additional_mem_pool_size = 20M
innodb_log_file_size = 256M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 50
innodb_flush_method=O_DIRECT
innodb_open_files=2000
#log_bin_trust_function_creators = 1
innodb_locks_unsafe_for_binlog=1
big-tables
[mysqldump]
quick
max_allowed_packet = 1073M
allow-keywords
[mysql]
no-auto-rehash
default-character-set=tis620
[isamchk]
key_buffer = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M
[myisamchk]
key_buffer = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
[mysqld_safe]
open-files-limit=20000