From: | Sailesh Krishnamurthy <sailesh(at)cs(dot)berkeley(dot)edu> |
---|---|
To: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | relation_byte_size() |
Date: | 2003-12-03 23:30:02 |
Message-ID: | bxyoeupxyx1.fsf@datafix.cs.berkeley.edu |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
Hackers
Here is the definition of relation_byte_size() in optimizer/path/costsize.c:
----------------------------------------------------------------------
/*
* relation_byte_size
* Estimate the storage space in bytes for a given number of tuples
* of a given width (size in bytes).
*/
static double
relation_byte_size(double tuples, int width)
{
return tuples * (MAXALIGN(width) + MAXALIGN(sizeof(HeapTupleData)));
}
----------------------------------------------------------------------
Shouldn't this be HeapTupleHeaderData and not HeapTupleData ?
(Of course, from a costing perspective these shouldn't be very different but ...)
--
Pip-pip
Sailesh
http://www.cs.berkeley.edu/~sailesh
From | Date | Subject | |
---|---|---|---|
Next Message | Doug McNaught | 2003-12-03 23:36:38 | Re: PostgreSQL 7.3.4 gets killed by SIG_KILL |
Previous Message | Magnus Naeslund(t) | 2003-12-03 23:00:58 | PostgreSQL 7.3.4 gets killed by SIG_KILL |