作者： TiDBer_UutZcd5Y 原文来源： https://tidb.net/blog/24179946
集群信息
Cluster type: tidb
Cluster name: tidb02
Cluster version: v7.1.0
Deploy user: tidb
SSH type: builtin
Dashboard URL: http://10.1.6.116:2379/dashboard
Grafana URL: http://10.1.6.100:3000
ID Role Host Ports OS/Arch Status Data Dir Deploy Dir
10.1.6.100:9093 alertmanager 10.1.6.100 9093/9094 linux/x86_64 Up /data/tidb-data/alertmanager-9093 /data/tidb-deploy/alertmanager-9093
10.1.6.100:3000 grafana 10.1.6.100 3000 linux/x86_64 Up - /data/tidb-deploy/grafana-3000
10.1.6.116:2379 pd 10.1.6.116 2379/2380 linux/x86_64 Up|UI /data/tidb-data/pd-2379 /data/tidb-deploy/pd-2379
10.1.6.212:2379 pd 10.1.6.212 2379/2380 linux/x86_64 Up /data/tidb-data/pd-2379 /data/tidb-deploy/pd-2379
10.1.6.229:2379 pd 10.1.6.229 2379/2380 linux/x86_64 Up|L /data/tidb-data/pd-2379 /data/tidb-deploy/pd-2379
10.1.6.100:9090 prometheus 10.1.6.100 9090/12020 linux/x86_64 Up /data/tidb-data/prometheus-9090 /data/tidb-deploy/prometheus-9090
10.1.6.116:4000 tidb 10.1.6.116 4000/10080 linux/x86_64 Up - /data/tidb-deploy/tidb-4000
10.1.6.212:4000 tidb 10.1.6.212 4000/10080 linux/x86_64 Up - /data/tidb-deploy/tidb-4000
10.1.6.229:4000 tidb 10.1.6.229 4000/10080 linux/x86_64 Up - /data/tidb-deploy/tidb-4000
10.1.6.158:20160 tikv 10.1.6.158 20160/20180 linux/x86_64 Up /data/tidb-data/tikv-20160 /data/tidb-deploy/tikv-20160
10.1.6.196:20160 tikv 10.1.6.196 20160/20180 linux/x86_64 Up /data/tidb-data/tikv-20160 /data/tidb-deploy/tikv-20160
10.1.6.86:20160 tikv 10.1.6.86 20160/20180 linux/x86_64 Up /data/tidb-data/tikv-20160 /data/tidb-deploy/tikv-20160
Total nodes: 12
环境准备
创建资源组
CREATE RESOURCE GROUP IF NOT EXISTS rg100 RU_PER_SEC = 100;
CREATE RESOURCE GROUP IF NOT EXISTS rg500 RU_PER_SEC = 500;
CREATE RESOURCE GROUP IF NOT EXISTS rg1000 RU_PER_SEC = 1000;
CREATE RESOURCE GROUP IF NOT EXISTS rg2000 RU_PER_SEC = 2000;
CREATE RESOURCE GROUP IF NOT EXISTS rg3000 RU_PER_SEC = 3000;
创建用户
CREATE USER user100@'%' identified by 'user100';
CREATE USER user500@'%' identified by 'user500';
CREATE USER user1000@'%' identified by 'user1000';
CREATE USER user2000@'%' identified by 'user2000';
CREATE USER user3000@'%' identified by 'user3000';
绑定用户资源组
ALTER USER user100@'%' RESOURCE GROUP rg100;
ALTER USER user500@'%' RESOURCE GROUP rg500;
ALTER USER user1000@'%' RESOURCE GROUP rg1000;
ALTER USER user2000@'%' RESOURCE GROUP rg2000;
ALTER USER user3000@'%' RESOURCE GROUP rg3000;
给用户授权
GRANT ALL ON test.* TO user100@'%';
GRANT ALL ON test.* TO user500@'%';
GRANT ALL ON test.* TO user1000@'%';
GRANT ALL ON test.* TO user2000@'%';
GRANT ALL ON test.* TO user3000@'%';
查看资源组
命令行查看
mysql> select * from INFORMATION_SCHEMA.RESOURCE_GROUPS;
+---------+------------+----------+-----------+
| NAME | RU_PER_SEC | PRIORITY | BURSTABLE |
+---------+------------+----------+-----------+
| default | UNLIMITED | MEDIUM | YES |
| rg100 | 100 | MEDIUM | NO |
| rg1000 | 1000 | MEDIUM | NO |
| rg2000 | 2000 | MEDIUM | NO |
| rg3000 | 3000 | MEDIUM | NO |
| rg500 | 500 | MEDIUM | NO |
+---------+------------+----------+-----------+
6 rows in set (0.00 sec)
Dashboard查看
基准测试
使用tiup bench tpcc使用不同的用户压测
初始化数据
tiup bench tpcc --warehouses 4 --time 5m prepare -H 10.1.6.229 -P 4000 --user user100 -p 'user100'
以下几种场景
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user100 -p 'user100'
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user500 -p 'user500'
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user1000 -p 'user1000'
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user2000 -p 'user2000'
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user3000 -p 'user3000'
每次的qps基本和RU_PER_SEC的数量一一对应
再测一下没有资源限制的用户
CREATE USER user@'%' identified by 'user';
GRANT ALL ON test.* TO user@'%';
tiup bench tpcc --warehouses 4 --time 5m run -H 10.1.6.229 -P 4000 --user user -p 'user'
问题与建议
问题1：估算容量过大
从上图可以看到tpcc的估算容量是69768,而我使用无资源的用户最高可以跑到3000RU再乘以3个tidb，也才9000.
问题2：mysql.user User_attributes列的显示问题
新建用户该属性为{}
绑定资源组后为{"resource_group": "rg100"}
解绑资源组后又为{"resource_group": ""}
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| user100 | % | {"resource_group": "rg100"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {} |
+--------------------------+-------+------------------------------+
9 rows in set (0.00 sec)
mysql> alter user user resource group rg100;
Query OK, 0 rows affected (0.02 sec)
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| user100 | % | {"resource_group": "rg100"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {"resource_group": "rg100"} |
+--------------------------+-------+------------------------------+
9 rows in set (0.01 sec)
mysql> alter user user resource group ``;
Query OK, 0 rows affected (0.02 sec)
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| risk_control_center_user | % | {"resource_group": ""} |
| user100 | % | {"resource_group": "rg100"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {"resource_group": ""} |
+--------------------------+-------+------------------------------+
建议新建用户初始值、解绑资源后再还原设置为{"resource_group": "default"}
问题3：删除资源需先与用户解绑，如与多个用户绑定，只显示一个用户
mysql> alter user user resource group rg100;
Query OK, 0 rows affected (0.02 sec)
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| user100 | % | {"resource_group": "rg100"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {"resource_group": "rg100"} |
+--------------------------+-------+------------------------------+
9 rows in set (0.00 sec)
mysql> select * from INFORMATION_SCHEMA.RESOURCE_GROUPS;
+---------+------------+----------+-----------+
| NAME | RU_PER_SEC | PRIORITY | BURSTABLE |
+---------+------------+----------+-----------+
| default | UNLIMITED | MEDIUM | YES |
| rg100 | 100 | MEDIUM | NO |
| rg1000 | 1000 | MEDIUM | NO |
| rg2000 | 2000 | MEDIUM | NO |
| rg3000 | 3000 | MEDIUM | NO |
| rg500 | 500 | MEDIUM | NO |
+---------+------------+----------+-----------+
6 rows in set (0.00 sec)
mysql> drop resource group rg100;
ERROR 1105 (HY000): user [user] depends on the resource group to drop
mysql> alter user user resource group ``;
Query OK, 0 rows affected (0.02 sec)
mysql> drop resource group rg100;
ERROR 1105 (HY000): user [user100] depends on the resource group to drop
这里有两个用户使用到了rg100,删除时只显示了一个用户,该用户user解绑后，再删除才显示另一个用户user100。而且这里显示的用是只有用户名没有host的信息。
问题4：无法实时感知资源的变更
tiup bench tpcc --warehouses 4 --time 10m run -H 10.1.6.229 -P 4000 --user user100 -p 'user100'
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| user100 | % | {"resource_group": "rg100"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {"resource_group": ""} |
+--------------------------+-------+------------------------------+
9 rows in set (0.00 sec)
mysql> alter user user100 resource group rg3000;
Query OK, 0 rows affected (0.02 sec)
mysql> select user,host,User_attributes from mysql.user;
+--------------------------+-------+------------------------------+
| user | host | User_attributes |
+--------------------------+-------+------------------------------+
| root | % | NULL |
| user100 | % | {"resource_group": "rg3000"} |
| user500 | % | {"resource_group": "rg500"} |
| user1000 | % | {"resource_group": "rg1000"} |
| user2000 | % | {"resource_group": "rg2000"} |
| user3000 | % | {"resource_group": "rg3000"} |
| user | % | {"resource_group": ""} |
+--------------------------+-------+------------------------------+
9 rows in set (0.00 sec)
qps并未变化。