> > > Putting xl_prev to the end helps only for direct IO WAL sync > > > methods, else we would need it on every page. > > > > [There is already an XLogRecPtr on each 8k page.] > > Given that hardware sector size is still 512 bytes, should > there be a way of detecting a missing 512 byte block in the > middle of an 8K block. > The idea of simply writing a serial counter every 512 bytes > seems to be a good way to handle that...
No, we have CRC for that. You are not supposed to turn it off when you see a chance, that an 8k block is not whole. Andreas ---------------------------(end of broadcast)--------------------------- TIP 5: don't forget to increase your free space map settings
