> Now, if we can come up with something better than the ARC algorithm ...
Tom already did. His clock-sweep patch is already in the 8.1 source.
--
Josh Berkus
Aglio Database Solutions
San Francisco
---(end of broadcast)---
TIP 5: Have you checked
Well, this guy has it nailed. He cites Flajolet and Martin, which was (I
thought) as good as you could get with only a reasonable amount of memory per
statistic. Unfortunately, their hash table is a one-shot deal; there's no way
to maintain it once the table changes. His incremental update doesn
On Fri, Apr 29, 2005 at 04:35:13AM +0200, Enrico Weigelt wrote:
>
> there's often some talk about indices cannot be used if datatypes
> dont match.
PostgreSQL 8.0 is smarter than previous versions in this respect.
It'll use an index if possible even when the types don't match.
> On a larger (an
Mischa Sandberg wrote:
Perhaps I can save you some time (yes, I have a degree in Math). If I
understand correctly, you're trying extrapolate from the correlation
between a tiny sample and a larger sample. Introducing the tiny sample
into any decision can only produce a less accurate result than
Hi folks,
there's often some talk about indices cannot be used if datatypes
dont match.
On a larger (and long time growed) application I tend to use OID
for references on new tables while old stuff is using integer.
Is the planner smart enough to see both as compatible datatype
or is manual c
First I will comment my original idea.
Second I will give another improved suggestion (an idea).
I hope, that they will be useful for you.
(I don't know, wether the first one was useful at all because it showed,
that I and some others of us are not very good with statistics :( )
I haven't looked ab
Quoting Josh Berkus :
> > >Perhaps I can save you some time (yes, I have a degree in Math). If I
> > >understand correctly, you're trying extrapolate from the correlation
> > >between a tiny sample and a larger sample. Introducing the tiny sample
> > >into any decision can only produce a less accu
Quoting Richard Rowell <[EMAIL PROTECTED]>:
> I've ported enough of my companies database to Postgres to make
> warehousing on PG a real possibility. I thought I would toss my
> data
> migration architecture ideas out for the list to shoot apart..
>
[...]
Not much feedback required.
Yes, droppi
On Apr 27, 2005, at 7:46 PM, Greg Stark wrote:
In fact I think it's generally superior to having a layer like pgpool
having
to hand off all your database communication. Having to do an extra
context
switch to handle every database communication is crazy.
I suppose this depends on how many machin
> -Original Message-
> From: Josh Berkus [mailto:[EMAIL PROTECTED]
> Sent: 28 April 2005 04:09
> To: Dave Page
> Cc: Joshua D. Drake; Joel Fradkin; PostgreSQL Perform
> Subject: Re: [PERFORM] Final decision
>
> Dave, folks,
>
> > Err, yes. But that's not quite the same as core telling
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