状态查询
通过 SQL 可以查看 proxy 的配置以及状态信息，目前支持如下命令：
/*proxy*/help;/*proxy*/show config;/*proxy*/show status;
说明：如果使用 MySQL 客户端，需要在使用客户端时增加
-c选项，如 mysql -hxxx.xxx.xxx.xxx -Pxxxx -uxxx -pxxx -c。
示例如下：
mysql> /*proxy*/help;
+-----------------------+-------------------------------------------------------+
| command | description |
+-----------------------+-------------------------------------------------------+
| show config | show config from conf |
| show status | show proxy status,like route,shardkey and so on |
| set sys_log_level=N | change the sys debug level N should be 0,1,2,3 |
| set inter_log_level=N | change the interface debug level N should be 0,1 |
| set inter_time_open=N | change the interface time debug level N should be 0,1 |
| set sql_log_level=N | change the sql debug level N should be 0,1 |
| set slow_log_level=N | change the slow debug level N should be 0,1 |
| set slow_log_ms=N | change the slow ms |
| set log_clean_time=N | change the log clean days |
| set log_clean_size=N | change the log clean size in GB |
+-----------------------+-------------------------------------------------------+
10 rows in set (0.00 sec)
mysql> /*proxy*/show config;
+-----------------+--------------------+
| config_name | value |
+-----------------+--------------------+
| version | V2R120D001 |
| mode | group shard |
| rootdir | /shard_922 |
| sys_log_level | 0 |
| inter_log_level | 0 |
| inter_time_open | 0 |
| sql_log_level | 0 |
| slow_log_level | 0 |
| slow_log_ms | 1000 |
| log_clean_time | 1 |
| log_clean_size | 1 |
| rw_split | 1 |
| ip_pass_through | 0 |
+-----------------+--------------------+
14 rows in set (0.00 sec)
mysql> /*proxy*/show status;
+-----------------------------+------------------------------------------------------------------------------+
| status_name | value |
+-----------------------------+------------------------------------------------------------------------------+
| cluster | group_1499858910_79548 |
| set_1499859173_1:ip | 10.49.118.165:5025;10.175.98.109:5025@1@IDC_4@0,10.231.23.241:5025@1@IDC_2@0 |
| set_1499859173_1:hash_range | 0---31 |
| set_1499911640_3:ip | 10.49.118.165:5026;10.175.98.109:5026@1@IDC_4@0,10.231.23.241:5026@1@IDC_2@0 |
| set_1499911640_3:hash_range | 32---63 |
| set | set_1499859173_1,set_1499911640_3 |
同时 proxy 增强了 explain 的返回结果，显示 proxy 修改后的 SQL。
mysql> explain select * from test1;
+------+-------------+-------+------+---------------+------+---------+------+------+-------+-----------------------------------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra | info |
+------+-------------+-------+------+---------------+------+---------+------+------+-------+-----------------------------------------+
| 1 | SIMPLE | test1 | ALL | NULL | NULL | NULL | NULL | 16 | | set_2,explain select * from shard.test1 |
| 1 | SIMPLE | test1 | ALL | NULL | NULL | NULL | NULL | 16 | | set_1,explain select * from shard.test1 |
+------+-------------+-------+------+---------------+------+---------+------+------+-------+-----------------------------------------+
2 rows in set (0.03 sec)