Hi Ray Good idea i will try if i can run tcpdump on this server regards Hrishy --- On Fri, 14/8/09, Ray Stell <stellr@xxxxxxxxxx> wrote: From: Ray Stell <stellr@xxxxxxxxxx> Subject: Re: Where do i start for troubleshooting this issue To: "hrishy" <hrishys@xxxxxxxxxxx> Cc: oracle-l@xxxxxxxxxxxxx Date: Friday, 14 August, 2009, 2:30 PM On Fri, Aug 14, 2009 at 06:40:26AM +0000, hrishy wrote: > When i do a tnsping to the service name in a shell script the listener > responds in like 3500 secs ocassionally. > Where do i start troubleshooting this issue ? If it were me I'd use tcpdump first to see what the differential on the packet delivery looked like. tcpdump is unintrusive and that is why I would start there.