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set @my_max_user_connections= @@global.max_user_connections;
drop table if exists t1;
create table t1 (i int);
delete from mysql.user where user like 'mysqltest\_%';
delete from mysql.db where user like 'mysqltest\_%';
delete from mysql.tables_priv where user like 'mysqltest\_%';
delete from mysql.columns_priv where user like 'mysqltest\_%';
flush privileges;
create user mysqltest_1@localhost;
grant usage on *.* to mysqltest_1@localhost with max_queries_per_hour 2;
flush user_resources;
connect mqph, localhost, mysqltest_1,,;
connection mqph;
select * from t1;
i
select * from t1;
i
select * from t1;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_queries_per_hour' resource (current value: 2)
connect mqph2, localhost, mysqltest_1,,;
connection mqph2;
select * from t1;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_queries_per_hour' resource (current value: 2)
connection default;
drop user mysqltest_1@localhost;
disconnect mqph;
disconnect mqph2;
create user mysqltest_1@localhost;
grant usage on *.* to mysqltest_1@localhost with max_updates_per_hour 2;
flush user_resources;
connect muph, localhost, mysqltest_1,,;
connection muph;
select * from t1;
i
select * from t1;
i
select * from t1;
i
delete from t1;
delete from t1;
delete from t1;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_updates_per_hour' resource (current value: 2)
select * from t1;
i
connect muph2, localhost, mysqltest_1,,;
connection muph2;
delete from t1;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_updates_per_hour' resource (current value: 2)
select * from t1;
i
connection default;
drop user mysqltest_1@localhost;
disconnect muph;
disconnect muph2;
create user mysqltest_1@localhost;
grant usage on *.* to mysqltest_1@localhost with max_connections_per_hour 2;
flush user_resources;
connect mcph1, localhost, mysqltest_1,,;
connection mcph1;
select * from t1;
i
connect mcph2, localhost, mysqltest_1,,;
connection mcph2;
select * from t1;
i
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect mcph3, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_connections_per_hour' resource (current value: 2)
select * from t1;
i
disconnect mcph1;
disconnect mcph2;
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect mcph3, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_connections_per_hour' resource (current value: 2)
connection default;
drop user mysqltest_1@localhost;
flush privileges;
create user mysqltest_1@localhost;
grant usage on *.* to mysqltest_1@localhost with max_user_connections 2;
flush user_resources;
connect muc1, localhost, mysqltest_1,,;
connection muc1;
select * from t1;
i
connect muc2, localhost, mysqltest_1,,;
connection muc2;
select * from t1;
i
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muc3, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_user_connections' resource (current value: 2)
disconnect muc1;
connect muc3, localhost, mysqltest_1,,;
select * from t1;
i
connection default;
grant usage on *.* to mysqltest_1@localhost with max_user_connections 3;
flush user_resources;
connect muc4, localhost, mysqltest_1,,;
connection muc4;
select * from t1;
i
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muc5, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_user_connections' resource (current value: 3)
connection default;
grant usage on *.* to mysqltest_1@localhost with max_user_connections -1;
show grants for mysqltest_1@localhost;
Grants for mysqltest_1@localhost
GRANT USAGE ON *.* TO `mysqltest_1`@`localhost` WITH MAX_USER_CONNECTIONS -1
flush user_resources;
show grants for mysqltest_1@localhost;
Grants for mysqltest_1@localhost
GRANT USAGE ON *.* TO `mysqltest_1`@`localhost` WITH MAX_USER_CONNECTIONS -1
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muc5, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_user_connections' resource (current value: -1)
disconnect muc2;
disconnect muc3;
disconnect muc4;
drop user mysqltest_1@localhost;
select @@session.max_user_connections, @@global.max_user_connections;
@@session.max_user_connections @@global.max_user_connections
1000 1000
set session max_user_connections= 2;
ERROR HY000: SESSION variable 'max_user_connections' is read-only. Use SET GLOBAL to assign the value
set global max_user_connections= 2;
select @@session.max_user_connections, @@global.max_user_connections;
@@session.max_user_connections @@global.max_user_connections
2 2
create user mysqltest_1@localhost;
grant usage on *.* to mysqltest_1@localhost;
flush user_resources;
connect muca1, localhost, mysqltest_1,,;
connection muca1;
select @@session.max_user_connections, @@global.max_user_connections;
@@session.max_user_connections @@global.max_user_connections
2 2
connect muca2, localhost, mysqltest_1,,;
connection muca2;
select * from t1;
i
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muca3, localhost, mysqltest_1,,;
ERROR 42000: User mysqltest_1 already has more than 'max_user_connections' active connections
connection default;
grant usage on *.* to mysqltest_1@localhost with max_user_connections 3;
flush user_resources;
connect muca3, localhost, mysqltest_1,,;
connection muca3;
select @@session.max_user_connections, @@global.max_user_connections;
@@session.max_user_connections @@global.max_user_connections
3 2
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muca4, localhost, mysqltest_1,,;
ERROR 42000: User 'mysqltest_1' has exceeded the 'max_user_connections' resource (current value: 3)
connection default;
disconnect muca1;
disconnect muca2;
disconnect muca3;
set global max_user_connections= 0;
grant usage on *.* to mysqltest_1@localhost with max_user_connections 0;
set global max_user_connections=-1;
show variables like "max_user_user_connections";
Variable_name Value
select @@max_user_connections;
@@max_user_connections
-1
select @@global.max_user_connections;
@@global.max_user_connections
-1
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muca2, localhost, mysqltest_1,,;
ERROR 42000: User mysqltest_1 already has more than 'max_user_connections' active connections
connect muca2, localhost, root,,;
disconnect muca2;
connection default;
set global max_user_connections=1;
connect muca2, localhost, mysqltest_1,,;
connect(localhost,mysqltest_1,,test,MYSQL_PORT,MYSQL_SOCK);
connect muca3, localhost, mysqltest_1,,;
ERROR 42000: User mysqltest_1 already has more than 'max_user_connections' active connections
disconnect muca2;
connection default;
drop user mysqltest_1@localhost;
drop table t1;
set global max_user_connections= @my_max_user_connections;
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