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 ) id 1nZfwm-0004VX-W1 for pgsql-admin@arkaria.postgresql.org; Wed, 30 Mar 2022 21:33:44 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1nZfvn-0005tB-QX for pgsql-admin@arkaria.postgresql.org; Wed, 30 Mar 2022 21:32:43 +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 ) id 1nZfvn-0005t2-FP for pgsql-admin@lists.postgresql.org; Wed, 30 Mar 2022 21:32:43 +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 ) id 1nZfvk-0005V5-P6 for pgsql-admin@lists.postgresql.org; Wed, 30 Mar 2022 21:32:43 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id AE4306B46C for ; Wed, 30 Mar 2022 21:32:37 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at emo03-pco.easydns.vpn Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (emo03-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DaQNW59ki-uI for ; Wed, 30 Mar 2022 21:32:37 +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 6949E6B46B for ; Wed, 30 Mar 2022 21:32:37 +0000 (UTC) From: Scott Ribe Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 15.0 \(3693.60.0.1.1\)) Subject: WAL & ZFS Message-Id: Date: Wed, 30 Mar 2022 15:32:36 -0600 To: pgsql-admin X-Mailer: Apple Mail (2.3693.60.0.1.1) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk I've read all the info I could find re running PG on ZFS: turn off full = page writes, turn on lz4, tweak recordsize so as to take advantage of = compression, etc. One thing I haven't seen is whether a separate volume = for WAL would benefit from a larger recordsize. Or any other tweaks??? -- Scott Ribe scott_ribe@elevated-dev.com https://www.linkedin.com/in/scottribe/