版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/vbirdbest/article/details/83960210
一：Mycat管理命令和监控
Mycat可以通过终端来监控mycat的各项指标，端口为9066
mysql -h127.0.0.1 -P9066 -uroot -proot123
mysql> show @@help;
+--------------------------------------------------------------+--------------------------------------------+
| STATEMENT | DESCRIPTION |
+--------------------------------------------------------------+--------------------------------------------+
| show @@time.current | Report current timestamp |
| show @@time.startup | Report startup timestamp |
| show @@version | Report Mycat Server version |
| show @@server | Report server status |
| show @@threadpool | Report threadPool status |
| show @@database | Report databases |
| show @@datanode | Report dataNodes |
| show @@datanode where schema = ? | Report dataNodes |
| show @@datasource | Report dataSources |
| show @@datasource where dataNode = ? | Report dataSources |
| show @@datasource.synstatus | Report datasource data synchronous |
| show @@datasource.syndetail where name=? | Report datasource data synchronous detail |
| show @@datasource.cluster | Report datasource galary cluster variables |
| show @@processor | Report processor status |
| show @@command | Report commands status |
| show @@connection | Report connection status |
| show @@cache | Report system cache usage |
| show @@backend | Report backend connection status |
| show @@session | Report front session details |
| show @@connection.sql | Report connection sql |
| show @@sql.execute | Report execute status |
| show @@sql.detail where id = ? | Report execute detail status |
| show @@sql | Report SQL list |
| show @@sql.high | Report Hight Frequency SQL |
| show @@sql.slow | Report slow SQL |
| show @@sql.resultset | Report BIG RESULTSET SQL |
| show @@sql.sum | Report User RW Stat |
| show @@sql.sum.user | Report User RW Stat |
| show @@sql.sum.table | Report Table RW Stat |
| show @@parser | Report parser status |
| show @@router | Report router status |
| show @@heartbeat | Report heartbeat status |
| show @@heartbeat.detail where name=? | Report heartbeat current detail |
| show @@slow where schema = ? | Report schema slow sql |
| show @@slow where datanode = ? | Report datanode slow sql |
| show @@sysparam | Report system param |
| show @@syslog limit=? | Report system mycat.log |
| show @@white | show mycat white host |
| show @@white.set=?,? | set mycat white host,[ip,user] |
| show @@directmemory=1 or 2 | show mycat direct memory usage |
| show @@check_global -SCHEMA= ? -TABLE=? -retry=? -interval=? | check mycat global table consistency |
| switch @@datasource name:index | Switch dataSource |
| kill @@connection id1,id2,... | Kill the specified connections |
| stop @@heartbeat name:time | Pause dataNode heartbeat |
| reload @@config | Reload basic config from file |
| reload @@config_all | Reload all config from file |
| reload @@route | Reload route config from file |
| reload @@user | Reload user config from file |
| reload @@sqlslow= | Set Slow SQL Time(ms) |
| reload @@user_stat | Reset show @@sql @@sql.sum @@sql.slow |
| rollback @@config | Rollback all config from memory |
| rollback @@route | Rollback route config from memory |
| rollback @@user | Rollback user config from memory |
| reload @@sqlstat=open | Open real-time sql stat analyzer |
| reload @@sqlstat=close | Close real-time sql stat analyzer |
| offline | Change MyCat status to OFF |
| online | Change MyCat status to ON |
| clear @@slow where schema = ? | Clear slow sql by schema |
| clear @@slow where datanode = ? | Clear slow sql by datanode |
+--------------------------------------------------------------+--------------------------------------------+
59 rows in set (0.01 sec)
mysql> show @@server;
+-------------+-------------+--------------+------------+---------------+---------------+---------+--------+
| UPTIME | USED_MEMORY | TOTAL_MEMORY | MAX_MEMORY | RELOAD_TIME | ROLLBACK_TIME | CHARSET | STATUS |
+-------------+-------------+--------------+------------+---------------+---------------+---------+--------+
| 8m 7s 538ms | 230861432 | 1029177344 | 3817865216 | 1541149359926 | -1 | utf8 | ON |
+-------------+-------------+--------------+------------+---------------+---------------+---------+--------+
mysql> show @@database;
+----------+
| DATABASE |
+----------+
| testdb |
+----------+
1 row in set (0.00 sec)
mysql> show @@heartbeat;
+------------+-------+----------------+------+---------+-------+--------+---------+--------------+---------------------+-------+
| NAME | TYPE | HOST | PORT | RS_CODE | RETRY | STATUS | TIMEOUT | EXECUTE_TIME | LAST_ACTIVE_TIME | STOP |
+------------+-------+----------------+------+---------+-------+--------+---------+--------------+---------------------+-------+
| hostMaster | mysql | 172.16.128.148 | 3306 | 1 | 0 | idle | 30000 | 1,2,2 | 2018-11-02 17:09:40 | false |
| hostMaster | mysql | 172.16.128.153 | 3306 | 1 | 0 | idle | 30000 | 1,1,1 | 2018-11-02 17:09:40 | false |
| hostMaster | mysql | 172.16.128.152 | 3306 | 1 | 0 | idle | 30000 | 1,2,2 | 2018-11-02 17:09:40 | false |
+------------+-------+----------------+------+---------+-------+--------+---------+--------------+---------------------+-------+
3 rows in set (0.00 sec)
-- 显示缓存的使用情况，对于性能监控和调优很有价值
mysql> show @@cache;
+-------------------------------------+-------+------+--------+------+------+-------------+----------+
| CACHE | MAX | CUR | ACCESS | HIT | PUT | LAST_ACCESS | LAST_PUT |
+-------------------------------------+-------+------+--------+------+------+-------------+----------+
| ER_SQL2PARENTID | 1000 | 0 | 0 | 0 | 0 | 0 | 0 |
| SQLRouteCache | 10000 | 0 | 0 | 0 | 0 | 0 | 0 |
| TableID2DataNodeCache.TESTDB_ORDERS | 50000 | 0 | 0 | 0 | 0 | 0 | 0 |
+-------------------------------------+-------+------+--------+------+------+-------------+----------+
3 rows in set (0.00 sec)
mysql> show @@connection;
+------------+------+-----------+------+------------+------+--------+---------+--------+---------+---------------+-------------+------------+---------+------------+
| PROCESSOR | ID | HOST | PORT | LOCAL_PORT | USER | SCHEMA | CHARSET | NET_IN | NET_OUT | ALIVE_TIME(S) | RECV_BUFFER | SEND_QUEUE | txlevel | autocommit |
+------------+------+-----------+------+------------+------+--------+---------+--------+---------+---------------+-------------+------------+---------+------------+
| Processor3 | 1 | 127.0.0.1 | 9066 | 62623 | root | NULL | utf8:33 | 314 | 9785 | 869 | 4096 | 0 | | |
+------------+------+-----------+------+------------+------+--------+---------+--------+---------+---------------+-------------+------------+---------+------------+
1 row in set (0.00 sec)
-- 重新加载配置文件schema.xml使其生效。
mysql> reload @@config;
mysql> show @@datanode;
二：Mycat-Eye安装
-
下载代码 https://gitee.com/MycatOne/Mycat-Eye
-
新建数据库mycat_eye，导入build/mycat_eye.sql文件，并在此数据库中新建数据库账户:dev，密码：123456
mysql -h127.0.0.1 -P3306 -uroot -proot123 mysql> create database mycat_eye default character set utf8mb4 collate utf8mb4_unicode_ci; mysql> use mycat_eye; mysql> source /Users/mengday/Softwares/Mycat-Eye/build/mycat_eye.sql mysql> CREATE USER 'dev'@'%' IDENTIFIED BY '07fa533360d9'; mysql> update mysql.user set authentication_string=password('123456') where user='dev'; mysql> grant all privileges on *.* to 'dev'@'%'; mysql> flush privileges;➜ ~ cd /Users/mengday/Softwares/Mycat-Eye ➜ mvn clean install cd /var/log sudo touch dbeye-for-nosql.log sudo chmod 777 dbeye-for-nosql.log①：命令行启动
# 启动mycateye-agent-xx.jar cd ~/Softwares/Mycat-Eye/mycateye-agent/target/ java -jar mycateye-agent-0.8.jar --mysql.host=localhost --spring.profiles.active=prod & # 启动mycateye-web-xx.jar java -jar mycateye-web-0.8.jar --mysql.host=localhost --agent.url=http://127.0.0.1:7003/agent &②：IDEA中启动程序 DbeyeAgentApplication
-
修改/Mycat-Eye/mycateye-agent/src/main/resources/application.properties
spring.profiles.active=prod -
修改application-prod.properties 中的mysql地址
mysql.host=127.0.0.1 -
运行Mycat-Eye/mycateye-agent/src/main/java/io/mycat/eye/agent/DbeyeAgentApplication.java
-
修改mycateye-web中的application.properties中的环境
/Mycat-Eye/mycateye-web/src/main/resources/application.propertiesspring.profiles.active=test -
运行Mycat-Eye/mycateye-web/src/main/java/io/mycat/eye/web/MycatEyeApplication.java
-
访问http://localhost:7001/