| From: | Scott Marlowe <smarlowe(at)g2switchworks(dot)com> |
|---|---|
| To: | Jonathan Blitz <jb(at)anykey(dot)co(dot)il> |
| Cc: | 'Francisco Reyes' <lists(at)stringsutils(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Adding and filling new column on big table |
| Date: | 2006-05-30 20:07:15 |
| Message-ID: | 1149019635.25526.94.camel@state.g2switchworks.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-performance |
On Tue, 2006-05-30 at 16:04, Jonathan Blitz wrote:
> >
> > Most laptop drives are only 5,400 RPM which would make a transaction like
> > you are describing likely take a while.
>
> Not sure what my one is but it is new(ish).
>
> >
> > No desktop at home you could try it on?
> > I think the problem with the laptop is likely it's drive.
>
> I suppose I could do but I need to install PostgreSQL there and then copy
> over the database.
Keep in mind, most, if not all IDE drives lie about fsync, so the speed
of the drive is a limit only if you're actually writing a lot of data.
If you're doing a lot of little transactions, the drive should be lying
and holding the data in cache on board, so the speed should be OK.
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