The default time interval for a standby server to take over when the active server fails is 15 seconds. However, users can configure this time using the Time to activate backup server item, as described on topic Hot-Standby Tab.

This time interval allows the previous server to finish the application, in case of a network-only failure. This configured time directly affects the ping time-out among servers. If it is too low, such as switching every 1 second and a ping timeout of 160 ms, there may be some spontaneous server switches, caused by minor network failures.