Craig White wrote:
> Do I need to discard some of the data that I've already accrued in
> instance variables and re-acquire the data in my controller to shrink
> the amount I 'POST' ? Would that help with the CookieOverflow ?  Is it
> possible to increase the size permitted ?

Cookies have a maximum size of 4K. That's how they were implemented and 
it has nothing to do with Rails. I suspect some object might be getting 
stored in your session. I would start by trying to track down exactly 
what is getting stored in the session cookie. If you must store more 
than 4K in your session then you'll need to change from the default 
session storage to one of the other options. But, you should first try 
to figure out why your session is larger than 4K and see if you can work 
around that.

A common problem is storing ActiveRecord objects in the session rather 
than just storing the id and looking up the ActiveRecord object on each 
request. Don't worry Rails should cache the SQL so it shouldn't be too 
much of a performance hit.
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