Received: from malur.postgresql.org ([217.196.149.56])
	by arkaria.postgresql.org with esmtps
 (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <pgsql-admin-owner+archive@lists.postgresql.org>)
	id 1miR4J-0005u3-5e
	for pgsql-admin@arkaria.postgresql.org; Thu, 04 Nov 2021 00:57:27 +0000
Received: from localhost ([127.0.0.1] helo=malur.postgresql.org)
	by malur.postgresql.org with esmtp (Exim 4.92)
	(envelope-from <pgsql-admin-owner+archive@lists.postgresql.org>)
	id 1miR4H-00030I-4k
	for pgsql-admin@arkaria.postgresql.org; Thu, 04 Nov 2021 00:57:25 +0000
Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29])
	by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <scott_ribe@elevated-dev.com>)
	id 1miR4G-000308-RO
	for pgsql-admin@lists.postgresql.org; Thu, 04 Nov 2021 00:57:24 +0000
Received: from mailout.easymail.ca ([64.68.200.34])
	by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256)
	(Exim 4.92)
	(envelope-from <scott_ribe@elevated-dev.com>)
	id 1miR4E-00079L-9p
	for pgsql-admin@lists.postgresql.org; Thu, 04 Nov 2021 00:57:24 +0000
Received: from localhost (localhost [127.0.0.1])
	by mailout.easymail.ca (Postfix) with ESMTP id 8D9DC29AE9;
	Thu,  4 Nov 2021 00:57:19 +0000 (UTC)
X-Virus-Scanned: Debian amavisd-new at emo02-pco.easydns.vpn
Received: from mailout.easymail.ca ([127.0.0.1])
	by localhost (emo02-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id cZRFgrVTQYIM; Thu,  4 Nov 2021 00:57:19 +0000 (UTC)
Received: from smtpclient.apple (unknown [4.28.96.150])
	(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
	(No client certificate requested)
	by mailout.easymail.ca (Postfix) with ESMTPSA id 3ADB22934F;
	Thu,  4 Nov 2021 00:57:19 +0000 (UTC)
Content-Type: text/plain;
	charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 14.0 \(3654.120.0.1.13\))
Subject: Re: q re removal/recycling of WAL files
From: Scott Ribe <scott_ribe@elevated-dev.com>
In-Reply-To: <6F0CF776-AA45-4989-AF0D-084F57D74CD0@crazybean.net>
Date: Wed, 3 Nov 2021 18:57:18 -0600
Cc: pgsql-admin <pgsql-admin@lists.postgresql.org>
Content-Transfer-Encoding: quoted-printable
Message-Id: <D1A01608-4D0A-4AD5-BAB0-980B7B68FE7A@elevated-dev.com>
References: <4B485D8E-9692-4009-8562-43BC0E54C975@elevated-dev.com>
 <6F0CF776-AA45-4989-AF0D-084F57D74CD0@crazybean.net>
To: Rui DeSousa <rui@crazybean.net>
X-Mailer: Apple Mail (2.3654.120.0.1.13)
List-Id: <pgsql-admin.lists.postgresql.org>
List-Help: <https://lists.postgresql.org/manage/>
List-Subscribe: <https://lists.postgresql.org/manage/>
List-Post: <mailto:pgsql-admin@lists.postgresql.org>
List-Owner: <mailto:pgsql-admin-owner@lists.postgresql.org>
List-Archive: <https://www.postgresql.org/list/pgsql-admin>
Archived-At: 
 <https://www.postgresql.org/message-id/D1A01608-4D0A-4AD5-BAB0-980B7B68FE7A%40elevated-dev.com>
Precedence: bulk

> On Nov 3, 2021, at 5:37 PM, Rui DeSousa <rui@crazybean.net> wrote:
>=20
> WAL file can=E2=80=99t be recycled until it is no longer needed; thus =
after a checkpoint and archived as well (if enabled).=20


Ah yes, that's it! We are archiving WAL, and I imagine what happened =
easily outran the pace of archiving.

There was an exponential backoff between the retries, so although I =
could imagine rapid-fire retries filling disk with WAL before checkpoint =
running, I was having a little doubt about that happening in this case. =
I'm sure it was the archiving.