ขอคำแนะนำ my.cnf สำหรับ แรม 12G ด้วยครับ

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ได้ server มาใหม่ IBM system x 3100 m4  CPU Intel Xeon 3.5G  HDD 600 G Ram 12G     
***CentOs 6.4 64 bit  ลงแบบธรรมดา ไม่ได้แบ่งพื้นที่
***Percona 5.5.28  ผ่าน tool BMSxTraBackup   

ได้ my.cnf
[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
default_storage_engine=MyISAM
key_buffer = 1187M
max_allowed_packet = 512M
table_cache = 1500
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 1M
myisam_sort_buffer_size = 128M
thread_cache = 8
query_cache_size= 593M
thread_concurrency = 8
character-set-server=tis620
skip-name-resolve
innodb_file_per_table
skip-character-set-client-handshake
init_connect = 'SET NAMES tis620'
max_heap_table_size = 593M
innodb_data_home_dir = /var/lib/mysql/
innodb_data_file_path = ibdata1:100M:autoextend
innodb_log_files_in_group=2
innodb_log_group_home_dir = /var/lib/mysql/
innodb_buffer_pool_size = 5934M
innodb_additional_mem_pool_size = 20M
innodb_thread_concurrency = 0
innodb_log_file_size = 256M
innodb_log_buffer_size = 32M
innodb_flush_log_at_trx_commit = 2
innodb_lock_wait_timeout = 50
innodb_doublewrite=0
innodb_support_xa = 0
innodb_open_files = 3000
innodb_locks_unsafe_for_binlog=1
myisam-recover=FORCE,BACKUP
innodb_file_format = Barracuda
innodb_flush_method=O_DIRECT
join_buffer_size = 2M
concurrent_insert = 2
max_connections=1000
[mysqldump]
quick
max_allowed_packet = 512M
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