In the previous article here we talked about how to properly update more than one row at a time, under the title Batch Update. We did consider performances, including network round trips, and did look at the behavior of our results when used concurrently.
A case where we want to apply the previous article approach is when replicating data with a trigger based solution, such as SkyTools and londiste. Well, maybe not in all cases, we need to have a amount of UPDATE trafic worthy of setting up the solution.