> Here's an idea: > > We read the page that we would have backed up, calc the CRC and > write a short WAL record with just the CRC, not the block. When > we recover we re-read the database page, calc its CRC and > compare it with the CRC from the transaction log. If they > differ, we know that the page was torn and we know the database > needs recovery. (So we calc the CRC when we log AND when we recover).
Won't work, since the page on disk may have x different contents between 2 checkpoints (bgwriter from lru). Only workable solution would imho be to write the LSN to each 512 byte block (not that I am propagating that idea). Andreas ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
