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 1jQc0k-0008TM-OO for pgsql-admin@arkaria.postgresql.org; Mon, 20 Apr 2020 19:23:18 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1jQc0j-0007zH-KZ for pgsql-admin@arkaria.postgresql.org; Mon, 20 Apr 2020 19:23:17 +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 1jQc0j-0007zA-DV for pgsql-admin@lists.postgresql.org; Mon, 20 Apr 2020 19:23:17 +0000 Received: from mailout.easymail.ca ([64.68.200.34]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1jQc0g-0000Le-U8 for pgsql-admin@postgresql.org; Mon, 20 Apr 2020 19:23:17 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id 016BAC1AF1; Mon, 20 Apr 2020 19:23:12 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at emo04-pco.easydns.vpn Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (emo04-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id S6tsEmmiknRl; Mon, 20 Apr 2020 19:23:11 +0000 (UTC) Received: from [192.168.2.127] (unknown [8.39.228.117]) (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 DA489C1305; Mon, 20 Apr 2020 19:23:08 +0000 (UTC) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 13.4 \(3608.80.23.2.2\)) Subject: Re: checkpoint process use too much memory From: Scott Ribe In-Reply-To: Date: Mon, 20 Apr 2020 13:23:06 -0600 Cc: Laurenz Albe , "pgsql-admin@postgresql.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: <5193b00d175f2e06a171ba375f1ef723e1700de4.camel@cybertec.at> To: jian xu X-Mailer: Apple Mail (2.3608.80.23.2.2) List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk > On Apr 20, 2020, at 1:13 PM, jian xu wrote: >=20 > Do you mean the file cache will be counted in postgres checkpointer = memory usage? No, it won't be counted as PG memory. I just mean that free memory low = is not a sign of a problem, when it's file cache.