我的服务器有 8 个 cpu，Mysql 仅在 1 个 cpu 核心上 100% 运行。
如何使用所有核心？
我的我的.cnf
[mysqld]
safe-show-database
query_cache_limit=1M
query_cache_size=64M ## 32MB for every 1GB of RAM
query_cache_type=1
max_user_connections=200
max_connections=400
thread_cache=16
thread_cache_size=128
key_buffer=256M ## 128MB for every 1GB of RAM
key_buffer_size=280MB #30% RAM
join_buffer=1M
max_connect_errors=20
max_allowed_packet=16M
table_cache=1024
record_buffer=1M
sort_buffer_size=2M ## 1MB for every 1GB of RAM
read_buffer_size=2M ## 1MB for every 1GB of RAM
read_rnd_buffer_size=2M ## 1MB for every 1GB of RAM
thread_concurrency=16 ## Number of CPUs x 2
innodb_file_per_table
#innodb_thread_concurrency=8 ## Number of CPUs x 2
myisam_sort_buffer_size=64M
log_slow_queries=/var/log/mysql-slow-queries.log
long_query_time=20
interactive_timeout=20
#wait_timeout=57600
wait_timeout=100000
net_read_timeout=400
net_write_timeout=600
connect_timeout=20
delayed_insert_timeout=10
local-infile=0
log-warnings=2
log-error=/var/log/mysql_err.log
max_allowed_packet=32M
############
#log-bin=master1-bin
#expire_logs_days = 10 # purge binary log after 10 days
#max_binlog_size = 1024M
############
#log = /var/log/mysql.log
[mysql.server]
user=mysql
[safe_mysqld]
open_files_limit=8192
[mysqldump]
quick
max_allowed_packet=16M