Simon Riggs <simon@2ndQuadrant.com> writes:
> This will prevent commits being stalled when we occasionally switch clog
> and multixact pages, plus it also stops commits from being stalled when
> there are heavy writers in progress.
Exactly how would a priority mechanism prevent stalling? If the lock is
held for a long time, it's held for a long time.
The point of the LWLock mechanism is to be lightweight, so I'm
disinclined to put additional complexity into it without a *really*
good reason. Making it any slower would cost us in many places.
regards, tom lane
