Re: Reduce pinning in btree indexes

On Fri, Mar 13, 2015 at 8:52 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
> On 15 February 2015 at 00:19, Kevin Grittner <kgrittn@ymail.com> wrote:
>> What they wanted was what happened in the other database product --
>> if a snapshot got sufficiently old that cleaning up the MVCC data
>> was a problem *and* the snapshot was used again *and* it read a
>> page which had been modified far enough back that it was not
>> possible to return correct data, then they wanted to receive a
>> "snapshot too old" error.  I wrote a patch to do that...
>
> So, please lets see the patch. It seems useful for core Postgres.

It was submitted here:

http://www.postgresql.org/message-id/136937748.3364317.1423964815320.JavaMail.yahoo@mail.yahoo.com

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company