Greg Stark wrote: > > Tom Lane <[EMAIL PROTECTED]> writes: > > > Maybe we need a hybrid approach: clean a few percent of the LRU end of > > the ARC list in order to keep backends from blocking on writes, plus run > > a clock scan to keep checkpoints from having to do much. > > Well if you just keep note of when the last clock scan started then when you > get to the end of the list you've _done_ a checkpoint. > > Put another way, we already have such a clock scan, it's called checkpoint. > You could have checkpoint delay between each page write long enough to spread > the checkpoint i/o out over a configurable amount of time -- say half the > checkpoint interval -- and be done with that side of things.
But don't you have to keep the WAL files around longer then. -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (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 7: don't forget to increase your free space map settings
