set @save_log_warnings=@@log_warnings, @save_max_connections=@@max_connections;
SET GLOBAL log_warnings=4;
SET GLOBAL max_connections=10;
connect  tmp_con1,localhost,root,,;
connect  tmp_con2,localhost,root,,;
connect  tmp_con3,localhost,root,,;
connect  tmp_con4,localhost,root,,;
connect  tmp_con5,localhost,root,,;
connect  tmp_con6,localhost,root,,;
connect  tmp_con7,localhost,root,,;
connect  tmp_con8,localhost,root,,;
connect  con1,localhost,root,,;
SELECT 1;
1
1
connect  con2,localhost,root,,;
SELECT 2;
2
2
ERROR HY000: Too many connections
connection default;
SELECT 0;
0
0
show status like "Threads_connected";
Variable_name Value
Threads_connected 11
SET GLOBAL log_warnings=@save_log_warnings;
SET GLOBAL max_connections=@save_max_connections;