Re: Why Not MySQL?

Mitch Vincent <mitch@huntsvilleal.com>

From: "Mitch Vincent" <mitch@huntsvilleal.com>
To: "Tom Lane" <tgl@sss.pgh.pa.us>
Cc: <pgsql-hackers@postgresql.org>
Date: 2000-05-04T22:41:53Z
Lists: pgsql-hackers
> Well, drat.  Looks like 7.0's query plan is slower :-(.  There's
> something fishy about the numbers for 6.5.3 though --- how could it have
> done that query with zero blocks read?  Are you sure you are comparing
> apples to apples here?  I wonder whether the 6.5 system already had the
> tables cached in kernel disk buffers while 7.0 was working from a
> standing start and had to physically go to the disk.

This is very possible as the 6.5.3 PG is running on the production server
which is constantly being queried.

>Also, did both
> versions have the same -B and -S settings?

I didn't specify any -B or -S settings so both are using their respective
defaults..

Thanks!