Re: xmin horizon?

From: Torsten Förtsch <torsten(dot)foertsch(at)gmx(dot)net>
To: CS DBA <cs_dba(at)consistentstate(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: xmin horizon?
Date: 2015-07-30 01:21:55
Message-ID: 55B97C33.7090003@gmx.net
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On 29/07/15 21:13, CS DBA wrote:
> The documentation for pg_stat_activity lists this column:
>
> backend_xmin xid The current backend's xmin horizon.
>
> Can someone point me to a better understanding on "xmin horizon"?

https://momjian.us/main/writings/pgsql/mvcc.pdf

you can find this talk also on youtube. It's worth watching.

Torsten

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