Looks like Robert accidentally answered my question about what version his
results were from off-list. Here's his update:
---
Unfortunately it was 8.2.9, as I realized halfway into the run. Here are
the results from a CVS HEAD checkout last night.
*** Query planning times
q1 (the complex
Robert,
On Fri, Dec 5, 2008 at 7:24 PM, Greg Smith [EMAIL PROTECTED] wrote:
comparing to 8.2.9 results:
- q1 was 32% slower with dst = 10, 33% slower with dst = 1000
- other queries were 19% slower with dst = 10, 25% slower with dst = 1000
You mean that HEAD is slower than 8.2.9 or I don't
On Fri, Dec 5, 2008 at 7:24 PM, Greg Smith [EMAIL PROTECTED] wrote:
comparing to 8.2.9 results:
- q1 was 32% slower with dst = 10, 33% slower with dst = 1000
- other queries were 19% slower with dst = 10, 25% slower with dst = 1000
You mean that HEAD is slower than 8.2.9 or I don't
On Fri, Dec 5, 2008 at 8:11 PM, Robert Haas [EMAIL PROTECTED] wrote:
Correct. As compared with 8.2.9, ANALYZE was substantially faster,
but query planning was significantly slower.
Thanks also to Greg for reposting my emails. I didn't even realize I
hadn't sent them to the list.
Any chance
Thanks also to Greg for reposting my emails. I didn't even realize I
hadn't sent them to the list.
Any chance you could do the same test with a 8.3? It could be
interesting to see if it's a HEAD thing or if the slow down was
introduced in 8.3.
Somehow I knew you were going to ask that.
On Fri, Dec 5, 2008 at 2:16 PM, Guillaume Smet [EMAIL PROTECTED] wrote:
On Fri, Dec 5, 2008 at 8:11 PM, Robert Haas [EMAIL PROTECTED] wrote:
Correct. As compared with 8.2.9, ANALYZE was substantially faster,
but query planning was significantly slower.
Thanks also to Greg for reposting my
On Friday 05 December 2008 00:05:34 Robert Haas wrote:
On Thu, Nov 27, 2008 at 6:46 PM, Gregory Stark [EMAIL PROTECTED]
wrote:
ANALYZE with default_statistics_target set to 10 takes 13 s. With
100, 92 s. With 1000, 289 s.
That is interesting. It would also be interesting to total up
That is interesting. It would also be interesting to total up the time it
takes to run EXPLAIN (without ANALYZE) for a large number of queries.
I wonder if we'd see anything dramatically different using PREPARE...
Well... the point here is to measure planning time. I would think
that
On Thu, Nov 27, 2008 at 6:46 PM, Gregory Stark [EMAIL PROTECTED] wrote:
ANALYZE with default_statistics_target set to 10 takes 13 s. With
100, 92 s. With 1000, 289 s.
That is interesting. It would also be interesting to total up the time it
takes to run EXPLAIN (without ANALYZE) for a large
On Fri, 5 Dec 2008, Robert Haas wrote:
OK, I did this. I actually tried 10 .. 100 in increments of 10 and
then 100 ... 1000 in increments of 50, for 7 different queries of
varying complexity
Great bit of research. Was this against CVS HEAD or an 8.3 database?
--
* Greg Smith [EMAIL
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