mysql实时插入语句查看；卸载、重装mysql；

一、实时查看sql语句：

mysql> SHOW VARIABLES LIKE "general_log%";
mysql> set global general_log_file="/var/lib/mysql/geneeral_log.log";
mysql> set global general_log=on;
$ tail -f /var/lib/mysql/geneeral_log.log|grep gpsdata

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二、卸载、重装mysql

1.列出安装包

[root@localhost sysbench]# yum list installed mysql*
已加载插件：fastestmirror, langpacks
Determining fastest mirrors
 * base: mirrors.aliyun.com
 * elrepo: ftp.yz.yamagata-u.ac.jp
 * epel: nrt.edge.kernel.org
 * extras: mirrors.njupt.edu.cn
 * updates: mirrors.aliyun.com
已安装的软件包
mysql-community-client.x86_64                                                                                8.0.21-1.el7                                                                            installed
mysql-community-common.x86_64                                                                                8.0.21-1.el7                                                                            installed
mysql-community-libs.x86_64                                                                                  8.0.21-1.el7                                                                            installed
mysql-community-libs-compat.x86_64                                                                           8.0.21-1.el7                                                                            installed
mysql-community-server.x86_64                                                                                8.0.21-1.el7                                                                            installed
[root@localhost sysbench]# 

不推荐：rpm -qa|grep -i mysql
这个方式找到的会找到其他相关的，作为第一个无结果时可选项。

2.关闭mysql

[root@localhost sysbench]# systemctl stop mysqld
[root@localhost sysbench]#

3.清除安装包，并删除相关目录

[root@localhost sysbench]# rpm -e --nodeps mysql-libs-5.1.71-1.el6.x86_64
错误：未安装软件包 mysql-libs-5.1.71-1.el6.x86_64
[root@localhost sysbench]# rpm -e --nodeps mysql-community-client.x86_64
[root@localhost sysbench]# rpm -e --nodeps mysql-community-common.x86_64
[root@localhost sysbench]# rpm -e --nodeps mysql-community-libs.x86_64
[root@localhost sysbench]# rpm -e --nodeps mysql-community-libs-compat.x86_64
[root@localhost sysbench]# rpm -e --nodeps mysql-community-server.x86_64
警告：文件 /var/lib/mysql: 移除失败: 没有那个文件或目录
警告：/etc/my.cnf 已另存为 /etc/my.cnf.rpmsave
[root@localhost sysbench]# systemctl stop mysqld
Failed to stop mysqld.service: Unit mysqld.service not loaded.
[root@localhost sysbench]#

4.重装

转移datadir要给权限

 rpm -ivh ./sqlRPM/*.rpm
 chown -R mysql:mysql /home/mysql/

之后
①创建用户

②创建库表

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5.完整操作

@卸载

[root@localhost base74]# ls
base74.sh  expand  httpd.conf  my.cnf  php-74.ini  phpRPM  selinux  sqlRPM  vhost.conf  vsftpd.conf
[root@localhost base74]#  yum list installed mysql*
已加载插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * base: mirrors.njupt.edu.cn
 * elrepo: ftp.yz.yamagata-u.ac.jp
 * epel: nrt.edge.kernel.org
 * extras: mirrors.njupt.edu.cn
 * updates: mirrors.aliyun.com
已安装的软件包
mysql-community-client.x86_64                                                                                              8.0.21-1.el7                                                                                         installed
mysql-community-common.x86_64                                                                                              8.0.21-1.el7                                                                                         installed
mysql-community-libs.x86_64                                                                                                8.0.21-1.el7                                                                                         installed
mysql-community-libs-compat.x86_64                                                                                         8.0.21-1.el7                                                                                         installed
mysql-community-server.x86_64                                                                                              8.0.21-1.el7                                                                                         installed
[root@localhost base74]# systemctl stop mysqld
[root@localhost base74]# rpm -e --nodeps mysql-community-client.x86_64
[root@localhost base74]# rpm -e --nodeps mysql-community-common.x86_64
[root@localhost base74]# rpm -e --nodeps mysql-community-libs.x86_64
[root@localhost base74]# rpm -e --nodeps mysql-community-libs-compat.x86_64
[root@localhost base74]# rpm -e --nodeps mysql-community-server.x86_64
警告：/etc/my.cnf 已另存为 /etc/my.cnf.rpmsave
[root@localhost base74]# cd /home/mysql/
[root@localhost mysql]# ls
mysql  mysqlTuner  数据库存储目录
[root@localhost mysql]# cd mysql
[root@localhost mysql]# ls
1              binlog.000003  binlog.000007  binlog.000011  binlog.000015  binlog.000019  binlog.000023  ca-key.pem       #ib_16384_0.dblwr  ib_logfile0         media       performance_schema  server-key.pem
auto.cnf       binlog.000004  binlog.000008  binlog.000012  binlog.000016  binlog.000020  binlog.000024  ca.pem           #ib_16384_1.dblwr  ib_logfile1         mysql       private_key.pem     sys
binlog.000001  binlog.000005  binlog.000009  binlog.000013  binlog.000017  binlog.000021  binlog.000025  client-cert.pem  ib_buffer_pool     #innodb_temp        mysqld.log  public_key.pem      undo_001
binlog.000002  binlog.000006  binlog.000010  binlog.000014  binlog.000018  binlog.000022  binlog.index   client-key.pem   ibdata1            localhost-slow.log  mysql.ibd   server-cert.pem     undo_002
[root@localhost mysql]# du -hls ./
138G    ./
[root@localhost mysql]# 8000w 138G

@安装

安装包，去官网下即可

[root@localhost sqlRPM]# ls
mysql-community-client-8.0.21-1.el7.x86_64.rpm  mysql-community-libs-8.0.21-1.el7.x86_64.rpm         mysql-community-server-8.0.21-1.el7.x86_64.rpm
mysql-community-common-8.0.21-1.el7.x86_64.rpm  mysql-community-libs-compat-8.0.21-1.el7.x86_64.rpm
[root@localhost sqlRPM]# rpm -ivh ./*.rpm
警告：./mysql-community-client-8.0.21-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY
准备中...                          ################################# [100%]
正在升级/安装...
   1:mysql-community-common-8.0.21-1.e################################# [ 20%]
   2:mysql-community-libs-8.0.21-1.el7################################# [ 40%]
   3:mysql-community-client-8.0.21-1.e################################# [ 60%]
   4:mysql-community-server-8.0.21-1.e################################# [ 80%]
   5:mysql-community-libs-compat-8.0.2################################# [100%]
[root@localhost sqlRPM]#

@切换目录

安装完成，立即启动，创建账号；然后复制目录后，改权限，关闭旧的，启动新的

[root@localhost sqlRPM]# rm -rf /home/mysql/mysql
[root@localhost sqlRPM]# cp -rf /var/lib/mysql /home/mysql/
[root@localhost sqlRPM]# vim /etc/my.cnf
[root@localhost sqlRPM]# chown -R mysql:mysql /home/mysql/mysql
[root@localhost sqlRPM]# systemctl stop mysqld
[root@localhost sqlRPM]# systemctl start mysqld
[root@localhost sqlRPM]#

@config

[mysqld]
datadir=/home/mysql/mysql
socket=/var/lib/mysql/mysql.sock

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

open_files_limit=65535
explicit_defaults_for_timestamp

server_id=186
#lower_case_table_names=1
character_set_server=utf8mb4
safe_user_create
max_connections=3000
max_user_connections=2980
secure_file_priv=/home/mysql/mysql
max_connect_errors=100000
interactive_timeout=86400
sync_binlog=100
back_log=1024
max_binlog_cache_size=2G
max_binlog_size=512M
#default_storage_engine=InnoDB

log_slave_updates=1

log_bin=mysql-bin
binlog_format=mixed
binlog_cache_size=32M
max_binlog_size=512M
long_query_time=1
log_output=File
log_error=/var/log/mysql-error.log
slow_query_log=1
slow_query_log_file=/home/mysql/mysql/localhost-slow.log
log_queries_not_using_indexes=0
log_slave_updates=ON
log_slow_admin_statements=1
general_log=0
general_log_file=/home/mysql/mysql
binlog_expire_logs_seconds = 1728000

relay_log=/home/mysql/mysql/relay-bin
relay_log_index=/home/mysql/mysql/relay-bin.index

binlog-do-db=media
############ 主从
server-id=186
log-bin=mysql-bin
##master_info_repository=media
#relay-log-info-repository=media
relay-log-recovery
#

innodb_adaptive_flushing=ON
innodb_flush_log_at_trx_commit=2
innodb_max_dirty_pages_pct=60
innodb_open_files=60000
innodb_purge_threads=1
innodb_read_io_threads=4
innodb_stats_on_metadata=OFF
innodb_flush_method=O_DIRECT

[mysql]
no-auto-rehash
default-character-set=utf8mb4
net-buffer-length=64K
unbuffered
max-allowed-packet=2G

[mysqldump]
quick
max_allow_packet=2G
log_error=/home/mysql/mysql/mysql_dump_error.log
net_buffer_length=8K