| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Petr Jelinek <petr(at)2ndquadrant(dot)com>, Steve Singer <steve(at)ssinger(dot)info>, Andres Freund <andres(at)2ndquadrant(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Anssi Kääriäinen <anssi(dot)kaariainen(at)thl(dot)fi>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>, Jaime Casanova <jaime(at)2ndquadrant(dot)com> |
| Subject: | Re: tracking commit timestamps |
| Date: | 2014-11-10 13:25:30 |
| Message-ID: | CA+TgmoYhAL0_O5XguN51EW-GA32N0J_yWDTcD0pE=8RFvFBH3g@mail.gmail.com |
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| Lists: | pgsql-hackers pgsql-www |
On Sun, Nov 9, 2014 at 8:41 PM, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> Robert Haas wrote:
>> I think the key question here is the time for which the data needs to
>> be retained. 2^32 of anything is a lot, but why keep around that
>> number of records rather than more (after all, we have epochs to
>> distinguish one use of a given txid from another) or fewer?
>
> The problem is not how much data we retain; is about how much data we
> can address.
I thought I was responding to a concern about disk space utilization.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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