Currently one needs 636*1.6*2*noOfReplicas + 184 bytes per record
which amounts to about 4200 bytes per record. The 2 is a bug which
is fixed here as well, noOfReplicas is removed, it was there for
concurrent transactions but it is better to focus on supporting one
large transaction in the cluster. Also decreasing the safety factor
from 1.6 to 1.1.

Also removing unused parameters.