mysql数据库出过一次问题，找人优化后的代码，可以减少mysql链接方面的延时：
[mysqld]
skip-host-cache
skip-name-resolve具体优化方案
[client]
#password = your_password
port = 3306
socket = /tmp/mysql.sock
binlog_cache_size = 256K
thread_stack = 512K
join_buffer_size = 8192K
query_cache_type = 1
max_heap_table_size = 2048M
datadir = /www/server/data
default_storage_engine = InnoDB
skip-external-locking
key_buffer_size = 1024M
max_allowed_packet = 100G
table_open_cache = 2048
sort_buffer_size = 4096K
net_buffer_length = 4K
read_buffer_size = 4096K
read_rnd_buffer_size = 2048K
myisam_sort_buffer_size = 256M
thread_cache_size = 256
query_cache_size = 38400M
tmp_table_size = 2048M
max_connections = 500
max_connect_errors = 100
open_files_limit = 65535
#log-bin=mysql-bin
#binlog_format=mixed
server-id = 1
expire_logs_days = 10
slow_query_log=1
slow-query-log-file=/www/server/data/mysql-slow.log
long_query_time=3
#log_queries_not_using_indexes=on
innodb_data_home_dir = /www/server/data
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /www/server/data
innodb_buffer_pool_size = 4096M
innodb_log_file_size = 1024M
innodb_log_buffer_size = 256M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 90
innodb_read_io_threads = 32
innodb_write_io_threads = 32
federated
skip-external-locking #https://www.cnblogs.com/zjoch/p/4056446.html
[mysqldump]
quick
max_allowed_packet = 500M
[mysql]
no-auto-rehash
[myisamchk]
sort_buffer_size = 16M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout[client]
#password = your_password
port = 3306
socket = /tmp/mysql.sock
[mysqld]
binlog_cache_size = 256K
thread_stack = 512K
join_buffer_size = 8192K
query_cache_type = 1
max_heap_table_size = 2048M
port = 3306
socket = /tmp/mysql.sock
datadir = /www/server/data
default_storage_engine = InnoDB
skip-external-locking
key_buffer_size = 1024M
max_allowed_packet = 100G
table_open_cache = 2048
sort_buffer_size = 8192K
net_buffer_length = 4K
read_buffer_size = 4096K
read_rnd_buffer_size = 2048K
myisam_sort_buffer_size = 256M
thread_cache_size = 256
query_cache_size = 76800M
tmp_table_size = 2048M
skip-name-resolve
max_connections = 5000
max_connect_errors = 100
open_files_limit = 65535
log-bin=mysql-bin
binlog_format=mixed
server-id = 1
expire_logs_days = 2
slow_query_log=1
slow-query-log-file=/www/server/data/mysql-slow.log
long_query_time=3
#log_queries_not_using_indexes=on
innodb_data_home_dir = /www/server/data
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /www/server/data
innodb_buffer_pool_size = 4096M
innodb_log_file_size = 1024M
innodb_log_buffer_size = 256M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50
innodb_max_dirty_pages_pct = 90
innodb_read_io_threads = 32
innodb_write_io_threads = 32
[mysqldump]
quick
max_allowed_packet = 500M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 16M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout