From: | Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> |
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To: | Maxim Orlov <orlovmg(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: [PATCH] Add initial xid/mxid/mxoff to initdb |
Date: | 2022-11-25 12:19:18 |
Message-ID: | 01dcd08a-bb1b-68ed-89fe-f1ddbe5ea282@enterprisedb.com |
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Lists: | pgsql-hackers |
On 05.05.22 17:47, Maxim Orlov wrote:
> During work on 64-bit XID patch [1] we found handy to have initdb
> options to set initial xid/mxid/mxoff values to arbitrary non default
> values. It helps test different scenarios: related to wraparound,
> pg_upgrade from 32-bit XID to 64-bit XID, etc.
>
> We realize, this patch can be singled out as an independent patch from
> the whole patchset in [1] and be useful irrespective of 64-bit XID in
> cases of testing of wraparound and so on.
>
> In particular, we employed this patch to test recent changes in logical
> replication of subxacts [2] and found no problems in it near the point
> of publisher wraparound.
Just for completeness, over in the other thread the feedback was that
this functionality is better put into pg_resetwal.
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