retransmittion timer

Hello everyone, Yesterday my colleagues bring one issue of slow database response,there were 2 windows application servers and one of them was working fine and one had a problem.after taking capture from both of them i found that server which had no problem was responding in 23 sec and problematic servers was taking 43 seconds,after further drill i found that both server had few retransmittion but in working server retransmittion was happening in 2 sec(constant) whereas in problematic server it was above 4 seconds and 2 of them were above 9 seconds.both server are in same vlan.why this retransmittion timer varies in both of them.