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From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Subramanian,Ramachandran <ramachandran.subramanian@alte-leipziger.de>
To: pgsql-novice@lists.postgresql.org <pgsql-novice@lists.postgresql.org>
Subject: Re: Replication Testing- How to introduce a Lag
Date: Tue, 24 Mar 2026 17:41:51 +0100
Message-ID: <2fb6a2f5eb2c9a1cbe701a237c74223d121ca918.camel@cybertec.at> (raw)
In-Reply-To: <39ec6185a893473aa9217520e5a92be7@alte-leipziger.de>
References: <aadb9058660d4e10b5cee44b82458802@alte-leipziger.de>
	<f3927bc3a9baf4400325b91652869907f0581c97.camel@cybertec.at>
	<e1e41761323040228570cf6a7e02518e@alte-leipziger.de>
	<8b38fa5141905f9ad6983b8d5ae944e812e3d28a.camel@cybertec.at>
	<fa47fe18078043adbdfe007b7270ffd0@alte-leipziger.de>
	<fc42f77c80fdb3c0267148b807edfacc49b0b0ca.camel@cybertec.at>
	<fc3be1f56ded49dc9be519f92d8b9ab4@alte-leipziger.de>
	<0e00fcc0062b59b88f98dba4900ce49d5a9a3fea.camel@cybertec.at>
	<477369bf897b44feb2d2368f6fca93fc@alte-leipziger.de>
	<89d63402747edb3bf80ff668fdd63cc77334f446.camel@cybertec.at>
	<aa307627991c41f280bb6da27ebc9b1d@alte-leipziger.de>
	<013104103e016e84d59c1e2accb0b1b1f99d9870.camel@cybertec.at>
	<39ec6185a893473aa9217520e5a92be7@alte-leipziger.de>

On Tue, 2026-03-24 at 07:51 +0000, Subramanian,Ramachandran wrote:
> 3. If not caught up, how many bytes / KB worth of data needs to be replicated

Please define "caught up", in particular how you understand the term
in the presence of recovery_min_apply_delay, which you said you are setting.
The point of the parameter is to *prevent* WAL replay from catching up.

Yours,
Laurenz Albe





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  Cc: laurenz.albe@cybertec.at, ramachandran.subramanian@alte-leipziger.de, pgsql-novice@lists.postgresql.org
  Subject: Re: Replication Testing- How to introduce a Lag
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