Re: Proposal for CSN based snapshots - Mailing list pgsql-hackers

From Amit Kapila
Subject Re: Proposal for CSN based snapshots
Date
Msg-id CAA4eK1Jf5=OJ0YwPE_1e8w12-MC9hWHarX5Do+gk_jZysujFdg@mail.gmail.com
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In response to Re: Proposal for CSN based snapshots  (Heikki Linnakangas <hlinnakangas@vmware.com>)
Responses Re: Proposal for CSN based snapshots
List pgsql-hackers
On Mon, May 12, 2014 at 7:26 PM, Heikki Linnakangas
<hlinnakangas@vmware.com> wrote:
> In theory, we could use a snapshot LSN as the cutoff-point for
> HeapTupleSatisfiesVisibility(). Maybe it's just because this is new, but
> that makes me feel uneasy.

To accomplish this won't XID-CSN map table be required and how will
it be maintained (means when to clear and add a entry to that map table)?

With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com



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