On 2016-06-29 19:04:31 +0530, Amit Kapila wrote:
> There is nothing in this record which recorded the information about
> visibility clear flag.
I think we can actually defer the clearing to the lock release? A tuple
being locked doesn't require the vm being cleared.
> I think in this approach, it is important to measure the performance
> of update, may be you can use simple-update option of pgbench for
> various workloads. Try it with different fill factors (-F fillfactor
> option in pgbench).
Probably not sufficient, also needs toast activity, to show the really
bad case of many lock releases.