OSB project artifacts first time loading causing delay

Hi,
We are facing a delay between our proxy service and business service. The proxy service is loading its WSDL and schema from a common project which is having around 2500 wsdls and 6000 schema. The delay occurs first time we hit the service and again after 10 mins or sometime after 1hour. If we hit the service just after first time hit, then we don't see any delay between proxy service and business service. We have tried using routerruntimecachesize property but its not helping much as we only have 60 proxies and the default value for routerruntimecachesize is already 100.
Please suggest if you have faced this issue and if there is any tuning or change that we can do. This has become blocker for our go live.
Thanks

All the symptoms you quote sure sounds like a bandwidth issue to me. 
Obviously when you load a project directly from your hard drive then there's no issue with bandwidth.  But if you're pulling down 10 megs from a web server and it takes a while to start then bandwidth is the obvious issue.  I agree that 3-4 minutes sounds excessive for a 10 meg file but that depends entirely on how many users are sharing your bandwidth.  Try getting your people in these different locations to visit one of those websites that allows you to test your actual bandwidth.  It might not be as much as you think.
On another note...What do you have your preloader set to?  The default is 100% but you can usually set it to something like 25% without too much trouble.  That should cut the start time down appreciably but nothing is going to eliminate it completely because there'll always be some initial lag the first time your learners view the content.

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