Robert Haas robertmh...@gmail.com writes:
On Mon, Jun 1, 2009 at 3:34 PM, Selena Deckelmann sel...@endpoint.com wrote:
Suggested revision of Robert's prose:
Because genetic query optimization may be triggered, increasing
from_collapse_limit should be considered relative to xref
In the spirit of helping wrap-up 8.4 todo items...
Robert Haas wrote:
On Mon, May 25, 2009 at 6:15 PM, Tom Lanet...@sss.pgh.pa.us wrote:
Now I'm still not exactly happy with GEQO, but it's surely a lot better
than it was in the fall of 2000. So on the whole it does seem that the
current
On Mon, Jun 1, 2009 at 3:34 PM, Selena Deckelmann sel...@endpoint.com wrote:
In the spirit of helping wrap-up 8.4 todo items...
Robert Haas wrote:
For 8.4, I'd be happy to just improve the documentation. I think this
sentence could just be deleted from the section on
from_collapse_limit:
My
Robert Haas robertmh...@gmail.com writes:
On Thu, May 21, 2009 at 7:50 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Josh Berkus j...@agliodbs.com writes:
... trying to remember why I wrote that ... what would happen if
FROM_COLLAPSE_LIMIT was *more* than GEQO_THRESHOLD?
I think I wrote it, not
On Mon, May 25, 2009 at 6:15 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Now I'm still not exactly happy with GEQO, but it's surely a lot better
than it was in the fall of 2000. So on the whole it does seem that the
current relationships between from_collapse_limit, join_collapse_limit,
and
Josh Berkus j...@agliodbs.com writes:
Robert,
It appears that this statement has been in our documentation since Tom
Lane added FROM_COLLAPSE_LIMIT (back then, it was capitalized) on
January 25, 2003 (9bf97ff426de9), but I can't find any justification
for it anywhere. I think we either need
On Thu, May 21, 2009 at 7:50 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Josh Berkus j...@agliodbs.com writes:
Robert,
It appears that this statement has been in our documentation since Tom
Lane added FROM_COLLAPSE_LIMIT (back then, it was capitalized) on
January 25, 2003 (9bf97ff426de9), but I
Having just raised the statistics targets I wonder if we should look
at raising these two parameters too. The experience on the lists are
that when people run into either of these two limits we recommend
raising them and we've never seen anyone come back complaining that
their planning time goes
On Thu, May 21, 2009 at 8:51 AM, Greg Stark st...@enterprisedb.com wrote:
Having just raised the statistics targets I wonder if we should look
at raising these two parameters too. The experience on the lists are
that when people run into either of these two limits we recommend
raising them and
The docs contain the following sage advice concerning from_collapse_limit:
It is usually wise to keep this less than geqo_threshold.
I've been thinking through this advice on and off for about 2 years
and I still don't understand it. The point of either
from_collapse_limit and geqo_threshold is
Robert,
It appears that this statement has been in our documentation since Tom
Lane added FROM_COLLAPSE_LIMIT (back then, it was capitalized) on
January 25, 2003 (9bf97ff426de9), but I can't find any justification
for it anywhere. I think we either need to justify this advice, or
remove it.
On Thu, May 21, 2009 at 12:21 AM, Josh Berkus j...@agliodbs.com wrote:
It appears that this statement has been in our documentation since Tom
Lane added FROM_COLLAPSE_LIMIT (back then, it was capitalized) on
January 25, 2003 (9bf97ff426de9), but I can't find any justification
for it anywhere.
12 matches
Mail list logo
