Tom Lane wrote: > > I've been thinking about implementing a scheme that helps you decide how > > big the shared_buffers SHOULD BE, by making the LRU list bigger than the > > cache itself, so you'd be able to see whether there is beneficial effect in > > increasing shared_buffers. > > ARC already keeps such a list --- couldn't you learn what you want to > know from the existing data structure? It'd be fairly cool if we could > put out warnings "you ought to increase shared_buffers" analogous to the > existing facility for noting excessive checkpointing.
Agreed. ARC already keeps a list of buffers it had to push out recently so if it needs them again soon it knows its sizing of recent/frequent might be off (I think). Anyway, such a log report would be super-cool, say if you pushed out a buffer and needed it very soon, and the ARC buffers are already at their maximum for that buffer pool. -- Bruce Momjian | http://candle.pha.pa.us [EMAIL PROTECTED] | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup. | Newtown Square, Pennsylvania 19073 ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
