*Two new functions are added, pg_enable_data_checksums() and pg_disable_data_checksums(). The disable one is easy -- it just changes to disable. The enable one will change the state to inprogress, and then start a background worker (the “checksumhelper launcher”). This worker in turn will start one sub-worker (“checksumhelper worker”) in each database (currently all done sequentially).*
This is at least the fourth version of the pattern launcher plus worker background workers. I wonder whether we can do something to make this easier and less repetitive. Not in this patch, of course.
Peter, can I ask for some pointers in searching for previous versions?
I want to review patch this patch and some code comparision could be handy....
So far I've found only this [0,1] (without code) and threads mentioned by Magnus [2,3]
Or do you mean extracting "worker+lancher" for reuse for other purposes?
