p_s my.cnf(20130811)

[mysqld]
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 

max_connections = 2048
character-set-server = utf8
skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 16M
sort_buffer_size = 64K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
join_buffer_size = 64K
myisam_sort_buffer_size = 8M
query_cache_type = 0
query_cache_size = 0
query_cache_limit = 2M
thread_cache_size = 1024
table_open_cache = 4096
table_open_cache_instances = 64

max_heap_table_size = 1G
tmp_table_size = 512M

performance_schema = OFF

back_log = 1024

sync_binlog = 0
log-bin=mysql-bin
binlog_format=mixed
server-id  = 200
expire_logs_days = 7

open_files_limit = 65535
max_prepared_stmt_count = 65528

innodb_strict_mode
innodb_file_format = Barracuda
innodb_buffer_pool_instances = 32
innodb_buffer_pool_size = 32G
innodb_log_buffer_size = 64M
innodb_log_file_size = 1G
innodb_max_dirty_pages_pct = 80
innodb_flush_method = O_DIRECT
innodb_thread_concurrency = 0
innodb_purge_threads = 1
innodb_read_io_threads = 8
innodb_write_io_threads = 12
innodb_flush_neighbors = 0
innodb_io_capacity = 2000
innodb_io_capacity_max = 5000
innodb_open_files = 4000

skip-name-resolve

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

[mysqld_safe]
malloc-lib=/usr/local/lib/libjemalloc.so