Step 1 . 准备工作

关闭防火墙; 安装 MySQL依赖于libaio 库；下载，解压，重命名 MySQL的执行文件；新建用户组和用户 等准备工作在此不再赘述。

可执行文件目录为 /data/mysql57

添加用户和组的指令

groupadd mysql

useradd mysql -g mysql

Step 2 .  添加环境变量

在/etc/profile文件中，追加 PATH=${PATH}:/data/mysql57/bin/

保存后，如需要立即生效，可执行 source /etc/profile 。

step 3 . 创建目录并授权

在data根目录下执行

mkdir -p mysql3306/data mysql3306/mysql_log mysql3306/tmp mysql3307/data  mysql3307/mysql_log  mysql3307/tmp mysqld_multi/log

 创建记录log的文件，此步骤不可少。

touch /data/mysql3306/mysql_log/mysql3306.err

touch /data/mysql3307/mysql_log/mysql3307.err

 赋予目录和文件权限

chown -R mysql.mysql mysql3* mysqld_multi

在本测试案例中，mysql57是从其它服务上copy来的，不是直接下载解压的，所以多了下面的两步授权操作。

chmod -R 755 /data/mysql57/bin

chmod -R 755 /data/mysql57/support-files

step 4 . 编辑my.cnf

[client]
host=localhost
socket = /tmp/mysql.sock 
default-character-set=utf8mb4
#loose-local-infile=0

[mysqld]
user=mysql
log_bin_trust_function_creators=1
secure_file_priv='/tmp'

########server setting#######
sql_mode = "ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
character-set-server=utf8mb4
collation_server=utf8mb4_unicode_ci
lower_case_table_names = 0
skip_name_resolve = 1
#max_connect_errors = 1000
max_connections = 2000
thread_cache_size=256
#thread_stack= 262144
#back_log=80
max_allowed_packet = 134217728
event_scheduler = 1 
local-infile=0
#lower_case_table_names = 1
explicit_defaults_for_timestamp = 1
expire_logs_days = 7
log_bin_trust_function_creators =1

####.frm/.ibd files qty related
open_files_limit=65535
innodb_open_files=65535
table_open_cache=65535
table_definition_cache=65535

#### seesion buffer related
read_buffer_size = 262144
read_rnd_buffer_size = 524288
sort_buffer_size = 8388608
join_buffer_size = 8388608

####memory table size 
tmp_table_size =67108864
max_heap_table_size=67108864

####timeout
interactive_timeout = 1800
wait_timeout = 1800
# connect_timeout=10

########slow query ########
slow_query_log = 1
log_slow_slave_statements = 1
#log_queries_not_using_indexes = 1
log_throttle_queries_not_using_indexes = 10
long_query_time = 1
#min_examined_row_limit = 10000

########innodb settings########
innodb_buffer_pool_size = 10737418240
innodb_buffer_pool_instances = 16 
innodb_buffer_pool_dump_pct = 40
innodb_lru_scan_depth = 2048
innodb_page_cleaners = 16
#innodb_purge_threads = 4
innodb_sort_buffer_size = 67108864
#innodb_file_per_table = 1
#innodb_flush_log_at_trx_commit = 1

innodb_undo_log_truncate = 1
innodb_undo_tablespaces = 3 
innodb_max_undo_log_size = 2147483648
innodb_purge_rseg_truncate_frequency = 128

innodb_log_file_size = 1073741824
innodb_log_files_in_group = 3
innodb_log_buffer_size = 16777216
innodb_flush_method = O_DIRECT
innodb_flush_neighbors = 0
innodb_print_all_deadlocks = 1

innodb_strict_mode = 1
#innodb_lock_wait_timeout = 50

innodb_io_capacity = 32768
innodb_io_capacity_max = 65536
innodb_thread_concurrency = 32
innodb_write_io_threads = 8
innodb_read_io_threads = 8

########replication settings######