On Sun, Nov 14, 2010 at 1:12 PM, Heikki Linnakangas
heikki.linnakan...@enterprisedb.com wrote:
On 14.11.2010 00:29, Robert Haas wrote:
On Sat, Nov 13, 2010 at 12:13 PM, Tom Lanet...@sss.pgh.pa.us wrote:
Hannu Krosingha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane
On 14.11.2010 00:29, Robert Haas wrote:
On Sat, Nov 13, 2010 at 12:13 PM, Tom Lanet...@sss.pgh.pa.us wrote:
Hannu Krosingha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane wrote:
If a table has no indexes, we will always decide that any same-page
update operation is a
If a table has no indexes, we will always decide that any same-page
update operation is a HOT update, since obviously it isn't modifying
any indexed columns. But is there any benefit to doing so? I don't
see one offhand, and it has a downside: we're very likely to
encounter broken HOT chains if
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane wrote:
If a table has no indexes, we will always decide that any same-page
update operation is a HOT update, since obviously it isn't modifying
any indexed columns. But is there any benefit to doing so?
If we do the in-page mini vacuum even without
Hannu Krosing ha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane wrote:
If a table has no indexes, we will always decide that any same-page
update operation is a HOT update, since obviously it isn't modifying
any indexed columns. But is there any benefit to doing so?
On Sat, 2010-11-13 at 12:13 -0500, Tom Lane wrote:
Hannu Krosing ha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane wrote:
If a table has no indexes, we will always decide that any same-page
update operation is a HOT update, since obviously it isn't modifying
any
Hannu Krosing ha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 12:13 -0500, Tom Lane wrote:
AFAICS we do: heap_update marks the page as prunable whether it's a HOT
update or not. The only difference between treating the update as HOT vs
not-HOT is that if there was more than one HOT
On Sat, Nov 13, 2010 at 12:13 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Hannu Krosing ha...@2ndquadrant.com writes:
On Sat, 2010-11-13 at 10:51 -0500, Tom Lane wrote:
If a table has no indexes, we will always decide that any same-page
update operation is a HOT update, since obviously it isn't
