ฝาก อ. ทุกท่าน ช่วย my.cnf หน่อยครับ ว่าควรปรับแต่งตรงไหนบ้างครับ

[kiatthanapat]

[client]
port      = 3306
socket      = /var/lib/mysql/mysql.sock
default-character-set=tis620

[mysqld]
port      = 3306
socket      = /var/lib/mysql/mysql.sock
skip-external-locking
skip-federated
big-tables
default-storage-engine = INNODB
default_table_type = INNODB
character-set-server=tis620

key_buffer = 900M
max_allowed_packet = 1024M
table_open_cache = 1800
sort_buffer_size = 1M 
read_buffer_size = 1M
read_rnd_buffer_size = 1M
myisam_sort_buffer_size = 1024M
thread_cache_size = 8
query_cache_size= 900M

thread_concurrency = 8
skip-name-resolve
innodb_file_per_table
skip-character-set-client-handshake
init_connect = 'SET NAMES tis620'
max_user_connections = 500
max_connections = 500


################## InnoDB  #######################
innodb_data_home_dir = /var/lib/mysql/
innodb_data_file_path = ibdata1:100M:autoextend
innodb_log_group_home_dir = /var/lib/mysql/
#################################################
innodb_buffer_pool_size = 9G
innodb_additional_mem_pool_size = 20M
innodb_log_file_size = 900M
innodb_log_buffer_size = 8M
log_bin_trust_function_creators=1
innodb_thread_concurrency = 0
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 50
innodb_flush_method=O_DIRECT
innodb_doublewrite=0   
innodb_support_xa=0       
innodb_open_files = 2600
innodb_locks_unsafe_for_binlog=1
innodb_file_format = barracuda


join_buffer_size = 4M
concurrent_insert = 2

max_heap_table_size = 512M



############# Percona-Server-5.1.xx XtraDB ############
innodb_adaptive_checkpoint = 1
innodb_io_capacity = 10000     
innodb_write_io_threads = 16   
innodb_read_io_threads = 16

[mysqldump]
quick
max_allowed_packet = 1024M
allow-keywords

[xtrabackup]
datadir=/var/lib/mysql
backupdir=/mysqlbackup

[mysql]
no-auto-rehash
default-character-set=tis620

[isamchk]
key_buffer = 512M
sort_buffer_size = 512M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 512M
sort_buffer_size = 512M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

[mysqld_safe]
open-files-limit=8192