On Mon, Apr 21, 2014 at 5:50 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > ARC *was* the predecessor algorithm. See commit 5d5087363.
I believe that the main impetus for replacing ARC with clock sweep came from patent issues, though. It was a happy coincidence that clock sweep happened to be better than ARC, but that doesn't mean that ARC didn't have some clear advantages, even if it wasn't worth it on balance. LRU-K, and 2Q have roughly the same advantages. I'm reasonably confident you can have the best of both worlds, or something closer to it. -- Peter Geoghegan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
