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347MYSQL ADMIN的学习 MYSQLADMIN的功能很多， 下面我们主要看下哪些功能是常用的吧。 1. 修改ROOT密码 [root@mysql_source ~]# mysqladmin -uroot -p password 'xg123' Enter password: [root@mysql_source ~]# mysql -uroot -pxg123 Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 352 Server version: 5.5.37-log Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. (testing)root@localhost [(none)]> 2. 查看当前版本以及数据库的一个大概运行情况： [root@mysql_source ~]# mysqladmin -uroot -p version Enter password: mysqladmin Ver 8.42 Distrib 5.1.61, for unknown-linux-gnu on x86_64 Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Server version 5.5.37-log Protocol version 10 Connection Localhost via UNIX socket UNIX socket /tmp/mysql.sock Uptime: 13 hours 47 min 0 sec Threads: 1 Questions: 4805035 Slow queries: 8 Opens: 384 Flush tables: 1 Open tables: 27 Queries per second avg: 96.836 3. 查看MYSQL当前运行情况 [root@mysql_source ~]# mysqladmin -uroot -p status Enter password: Uptime: 49707 Threads: 1 Questions: 4805037 Slow queries: 8 Opens: 384 Flush tables: 1 Open tables: 27 Queries per second avg: 96.667 4. 查看MYSQL是否存活。 [root@mysql_source ~]# mysqladmin -uroot -p ping Enter password: mysqld is alive 5. 查看MYSQL详细的运行情况 [root@mysql_source ~]# mysqladmin -uroot -p extended-status Enter password: +------------------------------------------+-------------+ | Variable_name | Value | +------------------------------------------+-------------+ | Aborted_clients | 1 | | Aborted_connects | 1 | | Binlog_cache_disk_use | 0 | | Binlog_cache_use | 2986419 | | Binlog_stmt_cache_disk_use | 0 | | Binlog_stmt_cache_use | 0 | | Bytes_received | 4704268399 | | Bytes_sent | 4471316943 | | Com_admin_commands | 2 | ......还有很多。 这个参数还可以做很多事情，如： mysqladmin -uroot -p -r -i 1 ext | awk -F"|" "BEGIN{ count=0; }" '{ if($2 ~ /Variable_name/ && ++count == 1){ print "----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read --"; print "---Time---|---QPS---|select insert update delete| read inserted updated deleted| logical physical"; } else if ($2 ~ /Queries/){queries=$3;} else if ($2 ~ /Com_select /){com_select=$3;} else if ($2 ~ /Com_insert /){com_insert=$3;} else if ($2 ~ /Com_update /){com_update=$3;} else if ($2 ~ /Com_delete /){com_delete=$3;} else if ($2 ~ /Innodb_rows_read/){innodb_rows_read=$3;} else if ($2 ~ /Innodb_rows_deleted/){innodb_rows_deleted=$3;} else if ($2 ~ /Innodb_rows_inserted/){innodb_rows_inserted=$3;} else if ($2 ~ /Innodb_rows_updated/){innodb_rows_updated=$3;} else if ($2 ~ /Innodb_buffer_pool_read_requests/){innodb_lor=$3;} else if ($2 ~ /Innodb_buffer_pool_reads/){innodb_phr=$3;} else if ($2 ~ /Uptime / && count >= 2){ printf(" %s |%9d",strftime("%H:%M:%S"),queries); printf("|%6d %6d %6d %6d",com_select,com_insert,com_update,com_delete); printf("|%6d %8d %7d %7d",innodb_rows_read,innodb_rows_inserted,innodb_rows_updated,innodb_rows_deleted); printf("|%10d %11dn",innodb_lor,innodb_phr); }}' ----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read -- ---Time---|---QPS---|select insert update delete| read inserted updated deleted| logical physical 10:58:17 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:18 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:19 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:20 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:21 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:22 | 1| 0 0 0 0| 0 0 0 0| 0 0 10:58:23 | 1| 0 0 0 0| 0 0 0 0| 0 0 可以看到这么些信息。 还是很详细的吧，可以看到QPS, TPS, 操作行以及BUFFER POOL READ的情况 这段内容出自于orczhou的BLOG。 6. 查看参数值。 [root@mysql_source ~]# mysqladmin -uroot -p var | grep innodb_log_buffer_size Enter password: | innodb_log_buffer_size | 8388608 7. 查看当前的PROCESS [root@mysql_source ~]# mysqladmin -uroot -p processlist Enter password: +-----+------+-----------+----+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +-----+------+-----------+----+---------+------+-------+------------------+ | 363 | root | localhost | | Query | 0 | | show processlist | 8. 创建数据库 [root@mysql_source ~]# mysqladmin -uroot -p create testdb Enter password: [root@mysql_source ~]# mysql -uroot -p -S /tmp/mysql.sock Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 365 Server version: 5.5.37-log Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. (testing)root@localhost [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | | testdb | +--------------------+ 9. DROP DATABASE; [root@mysql_source ~]# mysqladmin -uroot -p drop testdb Enter password: Dropping the database is potentially a very bad thing to do. Any data stored in the database will be destroyed. Do you really want to drop the 'testdb' database [y/N] y Database "testdb" dropped [root@mysql_source ~]# mysql -uroot -p -S /tmp/mysql.sock Enter password: Welcome to the MySQL monitor. Commands end with ; or g. Your MySQL connection id is 367 Server version: 5.5.37-log Source distribution Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. (testing)root@localhost [(none)]> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | | test | +--------------------+ 4 rows in set (0.01 sec) 10. 加载和刷新权限表。 [root@mysql_source ~]# mysqladmin -uroot -p reload Enter password: [root@mysql_source ~]# mysqladmin -uroot -p refresh Enter password: 11. 关闭数据库 [root@mysql_source ~]# mysqladmin -uroot -p shutdown Enter password: [root@mysql_source ~]# ps -elf | grep mysql 0 S root 23135 23043 0 80 0 - 25822 pipe_w 12:39 pts/2 00:00:00 grep mysql 12. KILL会话 [root@mysql_source ~]# mysqladmin -uroot -p processlist Enter password: +-----+------+-----------+----+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +-----+------+-----------+----+---------+------+-------+------------------+ | 370 | root | localhost | | Sleep | 37 | | | | 373 | root | localhost | | Query | 0 | | show processlist | +-----+------+-----------+----+---------+------+-------+------------------+ [root@mysql_source ~]# mysqladmin -uroot -p kill 370 Enter password: [root@mysql_source ~]# mysqladmin -uroot -p processlist Enter password: +-----+------+-----------+----+---------+------+-------+------------------+ | Id | User | Host | db | Command | Time | State | Info | +-----+------+-----------+----+---------+------+-------+------------------+ | 375 | root | localhost | | Query | 0 | | show processlist | +-----+------+-----------+----+---------+------+-------+------------------+ 当然还有更多更多的功能， 这里就不再一一列举了，把一些常用的东西记上， 以供查询。
转载于:https://www.cnblogs.com/o-to-s/articles/3781886.html
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