I am on 8.2 production and it will be difficult to upgrade to 8.3. Is it possible to backport the "%r" fix from 8.3 to 8.2? Regards Dhaval On Nov 13, 2007 11:26 PM, Simon Riggs <simon@xxxxxxxxxxxxxxx> wrote: > On Tue, 2007-11-13 at 00:07 -0500, Greg Smith wrote: > > On Mon, 12 Nov 2007, Mason Hale wrote: > > > > > After the wal segment file is copied by the restore_command script, is > > > it safe to delete it from my archive? > > > > While I believe you can toss them immediately, > > This is almost never possible. The last WAL file that must be kept > should be sufficient to allow recovery to restart from the last > restartpoint. So a variable number of WAL files needs to be kept, not 1, > not 2 and certainly never 0. > > pg_standby with 8.2 provides a -k option to allow keeping last N files, > whereas 8.3 passes the %r parameter to show the filename of the last > file that must be kept. > > > you should considering > > keeping those around for a bit regardless as an additional layer of > > disaster recovery resources. I try to avoid deleting them until a new > > base backup is made, because if you have the last backup and all the > > archived segments it gives you another potential way to rebuild the > > database in case of a large disaster damages both the primary and the > > secondary. You can never have too many ways to try and recover from such > > a situation. > > Agreed > > -- > Simon Riggs > 2ndQuadrant http://www.2ndQuadrant.com > > > ---------------------------(end of broadcast)--------------------------- > TIP 9: In versions below 8.0, the planner will ignore your desire to > choose an index scan if your joining column's datatypes do not > match > -- Dhaval Shah ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
