How I can reduce time interval that notifications are sent?

Hello,

I have several service cheks working fine.

The checks are executed at schedule intervals as expected, but nagios notifications are delayed. No escalations defined in nagios config.

The same notification has sent to several contacts with differences of 30 seconds or several minutes.

How I can reduce time interval that notifications are sent?

An example: (all notifications by email)

Host Type Time Contact

Test1 HOST UP 04-17-2008 12:37:51 ROM
Test1 HOST UP 04-17-2008 12:37:21 nagiosadmin
Test1 HOST DOWN 04-17-2008 12:33:21 ROM
Test1 HOST DOWN 04-17-2008 12:33:21 nagiosadmin
Test1 HOST UP 04-17-2008 11:13:12 ROM
Test1 HOST UP 04-17-2008 11:12:12 nagiosadmin
Test1 HOST DOWN 04-17-2008 11:03:51 ROM
Test1 HOST DOWN 04-17-2008 11:03:21 nagiosadmin

Note that notifications sent to “ROM” contact are sent with several seconds of difference with notifications to nagiosadmin contact.

Best regards.