set global tcp_keepalive_time = 1;
set global tcp_keepalive_interval =1;
set global tcp_keepalive_probes=1;
connect con1,"127.0.0.1",root,,test,$MASTER_MYPORT,;
disconnect con1;
connection default;
set global tcp_keepalive_time= default;
set global tcp_keepalive_interval= default;
set global tcp_keepalive_probes=default;