腾讯云TDSQL MySQL版 - 开发指南 数据库管理语句

Posted 2021-09-03 腾讯云数据库

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)