Re: [PATCHES] [HACKERS] External Sort timing debug statements
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Lane Sent: 03 October 2005 15:37 To: Simon Riggs Cc: pgsql-hackers@postgresql.org; pgsql-patches@postgresql.org Subject: Re: [PATCHES] [HACKERS] External Sort timing debug statements Simon Riggs [EMAIL PROTECTED] writes: The following patch implements a fairly light set of timing statements aimed at understanding external sort performance. There is no attempt to alter the algorithms. What do people think about putting something like this into 8.1? Strictly speaking it's a new feature, but the patch seems pretty noninvasive, and we'd be much more likely to get data points if the code exists in the mainline release than if people have to patch their copies. Agreed. postgres=# set debug_sort=true; I'm a bit inclined to call it trace_sort instead, and to document it under Developer Options. Comments? Sounds reasonable to me. Regards, Dave. ---(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
Re: [PATCHES] [HACKERS] External Sort timing debug statements
On Mon, Oct 03, 2005 at 10:36:57AM -0400, Tom Lane wrote: Simon Riggs [EMAIL PROTECTED] writes: The following patch implements a fairly light set of timing statements aimed at understanding external sort performance. There is no attempt to alter the algorithms. What do people think about putting something like this into 8.1? Strictly speaking it's a new feature, but the patch seems pretty noninvasive, and we'd be much more likely to get data points if the code exists in the mainline release than if people have to patch their copies. This would be good :) postgres=# set debug_sort=true; I'm a bit inclined to call it trace_sort instead, and to document it under Developer Options. Comments? +1 Cheers, D -- David Fetter [EMAIL PROTECTED] http://fetter.org/ phone: +1 510 893 6100 mobile: +1 415 235 3778 Remember to vote! ---(end of broadcast)--- TIP 6: explain analyze is your friend
