Re: 16-bit page checksums for 9.2

Simon Riggs <simon@2ndquadrant.com>

From: Simon Riggs <simon@2ndQuadrant.com>

To: Kevin Grittner <Kevin.Grittner@wicourts.gov>

Cc: david@fetter.org, andres@anarazel.de, aidan@highrise.ca, stark@mit.edu, pgsql-hackers@postgresql.org

Date: 2012-01-05T15:46:22Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Wakeup WALWriter as needed for asynchronous commit performance.
- 4de82f7d7c50 9.2.0 cited

Attachments

checksum16.v3.patch (text/x-patch) patch v3

On Wed, Jan 4, 2012 at 1:35 PM, Kevin Grittner
<Kevin.Grittner@wicourts.gov> wrote:
> Simon Riggs  wrote:
>
>> My focus was on getting something working first, then tuning. If
>> we're agreed that we have everything apart from the tuning then we
>> can proceed with tests to see which works better.
>
> Sure.  I just think you are there already except for what I got into.
>
> FWIW, moving the modulus application out of the loop is a very
> trivial change and has no affect on the results; it's strictly a
> performance issue.

New version attached, with your suggested changes included. Hole check
code is there as well, but ifdef'd out since it isn't a valid check in
all cases.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services