On Wed, 1 Aug 2007, Dan Baughman wrote:

> Thanks for the suggestions so far,  here is what the dumps yielded.
>
> I'm using ethereal to look at a side-by-side comparison of 
> a healthy conversation and one of the delayed 
> conversations.  The delayed conversation has two tcp 
> packet types that the normal conversation doesn't:
>
>           1) A lot of duplicate acks from the client to the server

do both get to the realserver?

>           2) TCP Retransmissions from the server to client.

do both transmissions arrive at the client? (I assume they 
leave the realserver.)

> It seems that there is a lot of traffic being duplicated 
> and received by the real server twice.  This isn't 
> occuring when they access the realserver ip to view the 
> site.  The extra load time is occuring after the server 
> receives such a duplicate ack, its a pause of about 3 
> seconds, then a tcp retransmission occurs.

hmm. Nothing springs to mind.

do you have any iptables rules anywhere?

is the unhealthy connection from clients all at one 
site/coming in from one provider?

> I guess it might be a version issue, 'ivsadm -v' yields: 
> ipvsadm v1.24 2003/06/07 (compiled with popt and IPVS 
> v1.2.0)

do you have a matching ipvsadm/ip_vs pair?

Joe

-- 
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
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