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 1jQb7K-0006Xd-7K for pgsql-admin@arkaria.postgresql.org; Mon, 20 Apr 2020 18:26:02 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1jQb7J-0001kc-5w for pgsql-admin@arkaria.postgresql.org; Mon, 20 Apr 2020 18:26:01 +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 1jQb7I-0001kV-Up for pgsql-admin@lists.postgresql.org; Mon, 20 Apr 2020 18:26:00 +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 1jQb7G-0008EZ-CE for pgsql-admin@postgresql.org; Mon, 20 Apr 2020 18:26:00 +0000 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id 591A4BFB68; Mon, 20 Apr 2020 18:25:56 +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 jF3Plw4yPhZH; Mon, 20 Apr 2020 18:25:56 +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 372B9C1B11; Mon, 20 Apr 2020 18:25:52 +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 12:25:51 -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 11:52 AM, jian xu wrote: >=20 > the free memory size was very low Remember that the OS will fill memory with file cache until something = else needs it.=