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And we have the combination which is the default (REDIRECT_TO_BUFFER). This has the best of both worlds. No reload button problems, because we do a client side redirect, but the rendering of the page itself is already done in the first request and stored in a buffer until the redirect returns, so because of this models are only attached and detached once and listviews only alter pages in one request, not 2.

Which one to use in a cluster

This is the best option for almost all situations except a non-sticky cluster environment because the redirect could then hit a different server from that in which the response buffer is being held. For these, though, the only really viable option is setting 1.