Bruce Momjian <pgman@candle.pha.pa.us> writes:
> You need a "clock sweep" like BSD uses (and probably others).
No, that's *fundamentally* wrong.
The reason we are going to the trouble of maintaining a complicated
cache algorithm like ARC is so that we can tell the heavily used pages
from the lesser used ones. To throw away that knowledge in favor of
doing I/O with a plain clock sweep algorithm is just wrong.
What's more, I don't even understand what clock sweep would mean given
that the ordering of the list is constantly changing.
regards, tom lane
