You would be interested in http://archives.postgresql.org/pgsql-hackers/2005-04/msg00565.php
On Thu, Apr 21, 2005 at 03:33:05PM -0400, Dave Chapeskie wrote: > On Thu, Apr 21, 2005 at 11:28:43AM -0700, Josh Berkus wrote: > > Michael, > > > > > ....Every five minutes, DBCC INDEXDEFRAG will report to the user an > > > estimated percentage completed. DBCC INDEXDEFRAG can be terminated at > > > any point in the process, and *any completed work is retained.*" > > > > Keen. Sounds like something for our TODO list. > > > > -- > > Josh Berkus > > Aglio Database Solutions > > San Francisco > > See http://archives.postgresql.org/pgsql-general/2005-03/msg01465.php > for my thoughts on a non-blocking alternative to REINDEX. I got no > replies to that message. :-( > > > I've almost got a working solution integrated in the backend that does > correct WAL logging and everything. (Writing the code to write and > replay WAL logs for complicated operations can be very annoying!) > > For now I've gone with a syntax of: > > REINDEX INDEX btree_index_name INCREMENTAL; > > (For now it's not a proper index AM (accessor method), instead the > generic index code knows this is only supported for btrees and directly > calls the btree_compress function.) > > It's not actually a REINDEX per-se in that it doesn't rebuild the whole > index. It holds brief exclusive locks on the index while it shuffles > items around to pack the leaf pages fuller. There were issues with the > code I attached to the above message that have been resolved with the > new code. With respect to the numbers provided in that e-mail the new > code also recycles more pages than before. > > Once I've finished it up I'll prepare and post a patch. > > -- > Dave Chapeskie > OpenPGP Key ID: 0x3D2B6B34 > > ---------------------------(end of broadcast)--------------------------- > TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED] > -- Jim C. Nasby, Database Consultant [EMAIL PROTECTED] Give your computer some brain candy! www.distributed.net Team #1828 Windows: "Where do you want to go today?" Linux: "Where do you want to go tomorrow?" FreeBSD: "Are you guys coming, or what?" ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
