Postgres Pro
Downloads
Home   >   mailing lists

Re: patch for new feature: Buffer Cache Hibernation - Mailing list pgsql-hackers

From Greg Stark
Subject Re: patch for new feature: Buffer Cache Hibernation
Date
Msg-id BANLkTimktbHZfSpvKAfKBCv5jCbOyraHgg@mail.gmail.com
Whole thread Raw
In response to Re: patch for new feature: Buffer Cache Hibernation  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Tree view 
On Wed, May 4, 2011 at 4:44 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Do you have
> any proof that writing out a few GB of buffers and then reading them
> back in is actually much cheaper than letting the database re-read the
> data from the disk files?

I believe he's just writing out the meta data. Ie, which blocks to
re-reread from the disk files.

-- 
greg

pgsql-hackers by date:

Previous
From: "David E. Wheeler"
Date:
Subject: Re: Extension Packaging
Next
From: Greg Smith
Date:
Subject: Re: patch for new feature: Buffer Cache Hibernation