2nd count include the 1st count also.
We have not restarted the DB since postgres 8.3 have been released.
Better HOT performance means.... 1st stat showed most of the updated tuples getting hot.
But the 2nd stat showed that most of the updated tuples are NOT getting hot.
On Wed, Jul 2, 2008 at 8:10 PM, Tom Lane <
tgl@sss.pgh.pa.us> wrote:
>> Is there a way to check if the page is fill and the update is going on a new
>> page ??
> IIRC, I don't think so.
You could make your application check to see if the page part of a row's
CTID changes when it's updated. But there's no centralized counter
other than the one you are already looking at.
I personally found the original post completely content-free, however,
since it gave no context for the two sets of numbers we were shown.
Over what intervals were the counts accumulated? Were the stats
counters reset after taking the first output, or does the second output
include the first? What exactly does the OP think that "better HOT
performance" is, anyway?
regards, tom lane
--
Regards
Gauri