DB-Mysql-快速安装

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yum安装mysql

1、修改配置文件vi /etc/my.cnf
2、创建目录
mkdir -p /home/mysql_3306
3、更改权限
chown mysql:mysql -R /home/mysql_3306
4、yum安装(yum安装为系统自带，只适用于测试或非高性能需求）
yum install mysql

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常用命令

查看连接：mysqladmin pr
查看有哪些库：mysqlshow
查看参数：mysqladmin var|grep dir
查看库：show databases;
查看用户：select user,host from mysql.user;
查看权限：show grants for root@’localhost’;
G授权：RANT ALL PRIVILEGES ON . TO ‘app_user’@’localhost’ identified by app_user;

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my.conf示例

#my.cnf
[client]
#host            = 127.0.0.1
default-character-set=utf8

[mysql]
prompt="hostname [\\d] [\\R:\\m:\\s]> "
pager="less -i -n -S"
no-auto-rehash

[mysqldump]
quick
max_allowed_packet = 32M

[mysqld]
user = mysql                                      #用户
basedir = /usr/                                   #软件目录 
datadir = /home/mysql_3306                        #数据目录
port = 3306                                       #端口
socket = /home/mysql_3306/mysql.sock              #套接字文件（进程间通信）
pid-file = /home/mysql_3306/mysql.pid             #pid文件
max_allowed_packet = 32M                          #允许最大包32M
ft_min_word_len = 4                               #全文索引的最小单词长度工。这个选项的默认设置是4，意思是在创建全文索引时不考虑那些由3个或更少的字符构建单词。
event_scheduler = 1                               #事件调度器(1开启，0关闭）
character-set-server = utf8                       #字符集

#performance                                      #
net_read_timeout = 60                             #
open_files_limit = 65535                          #打开文件数
back_log = 150                                    #
max_connections = 350                             #最大连接数
max_connect_errors = 100000                       #最大连接错误次数
external-locking = FALSE                          #当外部锁定起作用时，每个进程若要访问数据表，则必须等待之前的进程完成操作并解除锁定
binlog_cache_size = 4M                            #为每个session 分配的内存，在事务过程中用来存储二进制日志的缓存,提高记录bin-log的效率
performance_schema = 1                            #
#locked_in_memory = 1                             #
#max_binlog_cache_size = 2G                       #
#skip-networking                                  #
                                                  #
#logs                                             #
log-output=file                                   #
slow_query_log = 1                                #
slow_query_log_file =/home/mysql_3306/slow.log    #
log-error =/home/mysql_3306/error.log             #
log_warnings = 2                                  #
long_query_time = 1                               #
log-slow-admin-statements = 1                     #
log-queries-not-using-indexes = 0                 #
log-slow-slave-statements = 1                     #

#buffers & cache                                  #
table_cache = 256                                 #
max_heap_table_size = 64M                         #
sort_buffer_size = 2M                             #
join_buffer_size = 2M                             #
thread_cache_size = 256                           #
query_cache_size = 8M                             #
query_cache_limit = 256K                          #
query_cache_min_res_unit = 512                    #
thread_stack = 192K                               #
tmp_table_size = 64M                              #
key_buffer_size = 8M                              #
read_buffer_size = 1M                             #
read_rnd_buffer_size = 16M                        #
bulk_insert_buffer_size = 64M                     #

#myisam                                           #
myisam_sort_buffer_size = 128M                    #
myisam_max_sort_file_size = 10G                   #
myisam_repair_threads = 1                         #
myisam_recover                                    #

#replicate                                        #
server-id=13307                                   #serverid唯一号
#skip-slave-start = 1                             #
##master-host = 10.11.18.46                       #
##master-user = bm_rep_user                       #
##master-password = n4OeZHdN4a6Os                 #
##master-connect-retry = 60                       #
#log-slave-updates  = 0                           #
#expire_logs_days = 2                             #
#max_binlog_size = 1G                             #
#log-bin =                                        #
#log-bin-index =                                  #
#relay-log =                                      #
#relay-log-index =                                #
#relay-log-purge = 1                              #
#sync_binlog = 1                                  #
#innodb-support-xa = 0                            #
#binlog_format = MIXED                            #
#slave_compressed_protocol = 1                    #
#slave_transaction_retries = 10                   #
##binlog-ignore-db = mysql                        #
##replicate-ignore-db = mysql                     #
##slave-skip-errors = 1062,1053,1032              #

#innodb                                           #
innodb_file_format = Barracuda                    #
innodb_autoinc_lock_mode = 1                      #
innodb_additional_mem_pool_size = 16M             #
innodb_buffer_pool_size = BUFFER_G                #buffer_pool大小，一般为物理内存2/3
innodb_data_file_path = ibdata1:1G:autoextend     #
innodb_file_io_threads = 4                        #
innodb_thread_concurrency = 20                    #
innodb_flush_log_at_trx_commit = 1                #
innodb_log_buffer_size = 16M                      #
innodb_log_file_size = 256M                       #
innodb_log_files_in_group = 2                     #
innodb_max_dirty_pages_pct = 50                   #
innodb_lock_wait_timeout = 120                    #
innodb_file_per_table = 1                         #
innodb_rollback_on_timeout                        #
innodb_status_file = 1                            #
innodb_read_io_threads = 8                        #
innodb_write_io_threads = 8                       #
innodb_io_capacity = 2000                         #
innodb_adaptive_flushing = 1                      #
transaction_isolation = READ-COMMITTED            #
innodb_flush_method = O_DIRECT                    #
innodb_adaptive_hash_index_partitions = 8         #
innodb_buffer_pool_restore_at_startup = 10        #
innodb_dict_size_limit = 600M                     #
innodb_lazy_drop_table = 1                        #
innodb_old_blocks_pct = 20                        #
innodb_recovery_stats = 1                         #
#innodb_purge_batch_size                          #
#innodb_purge_threads                             #

#others                                           #
#exit-info                                        #

#HandlerSocket                                    #
#loose_handlersocket_port = 9998                  #
#loose_handlersocket_port_wr = 9999               #
#loose_handlersocket_threads = 8                  #
#loose_handlersocket_threads_wr = 1               #

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