As commented in
SAK-25677 it would be nice if administrator could change store place of JSF State with a property.
1.- Go to Samigo and inspect source code, and look for "ViewState" You will see something like in the screenshot.
2.- Go to Signup and do the same. You will see a similar big value.
3.- Now set the property jsf.state_saving_method.sakai.samigo=server in sakai.properties
4.- Go to Samigo again and check that the value is now pretty small.
5.- Go to Signup and check that the value is still very big.