Why is rezzing taking so long???

Should someon'es prim hair take 2 hours to rez?

Should my hosue take 1 hour to rez?

I go back and forth to same area. AFter it's fully rezzed, I leave, come back, and again an hour to rezz...what is with this?

After an upgrade your experience will be a bit unusual until things settle . This thread helps to explain what can be expected.

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It's like this:

We have an asset cluster. It's several machines that store our inventory, our shapes, our textures, objects, sounds, robots, sex balls, prim hair and sofas -- all that stuff. It's several terabytes of data. That's a whole lot of data. Much, much larger than you have in your computer.

Then we have simulators. Each simulator, or sim, has a name and physical space and stuff that sits inside it. It pulls all of that stuff down from the asset server, and sends it to you. (someone check me on this step) Simulators also calculate physics information, like how things bump into eachother and where they need to fly when those collisions happen.

Finally, we have clients. That's you and me running Second Life on our machines at home. Our clients have to connect to the asset cluster, which is very busy handing out terabytes of data to 900 simulators, and our clients have to connect to individual servers, which are all busily transferring data with the asset cluster.

The final result of all this is that a bunch of things are doing much more than they normally do at once. This makes everything look weird and perform poorly for about 36 hours after a patch. Once everything is up to speed, there is dramatically less data transfer happening concurrently and everything works like we expect.