From owner-freebsd-hackers@freebsd.org Sat Nov 17 21:44:50 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 110BD1107378 for ; Sat, 17 Nov 2018 21:44:50 +0000 (UTC) (envelope-from rebecca@bluestop.org) Received: from muon.bluestop.org (muon.bluestop.org [96.73.9.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 1C4468170E for ; Sat, 17 Nov 2018 21:44:49 +0000 (UTC) (envelope-from rebecca@bluestop.org) Received: from muon.bluestop.org (localhost [127.0.0.1]) by muon.bluestop.org (Postfix) with ESMTP id CEC70D21C7 for ; Sat, 17 Nov 2018 14:45:25 -0700 (MST) Received: from muon.bluestop.org ([127.0.0.1]) by muon.bluestop.org (muon.bluestop.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id t0ROcv3YaN54 for ; Sat, 17 Nov 2018 14:45:25 -0700 (MST) Received: from photon.int.bluestop.org (gw.bluestop.org [96.73.9.3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by muon.bluestop.org (Postfix) with ESMTPSA for ; Sat, 17 Nov 2018 14:45:25 -0700 (MST) From: Rebecca Cran To: freebsd-hackers Hackers Subject: 13-CURRENT: several GB swap being used despite plenty of free RAM Date: Sat, 17 Nov 2018 14:44:41 -0700 Message-ID: <1748688.u6MfGjpqfb@photon.int.bluestop.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Rspamd-Queue-Id: 1C4468170E X-Spamd-Result: default: False [-4.67 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_DKIM_ALLOW(-0.20)[bluestop.org]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+mx]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-hackers@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; RCVD_COUNT_THREE(0.00)[4]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[bluestop.org:+]; DMARC_POLICY_ALLOW(-0.50)[bluestop.org,quarantine]; MX_GOOD(-0.01)[mail.bluestop.org]; NEURAL_HAM_SHORT(-0.97)[-0.972,0]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; CTE_CASE(0.50)[]; ASN(0.00)[asn:7922, ipnet:96.64.0.0/11, country:US]; IP_SCORE(-3.18)[ip: (-9.81), ipnet: 96.64.0.0/11(-4.89), asn: 7922(-1.13), country: US(-0.10)] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Nov 2018 21:44:50 -0000 I'm running 13-CURRENT from a few days ago. I noticed the system using several GB of swap despite having 90GB RAM still free. I know FreeBSD will use *some*, but 3450MB seems excessive when there's still 90GB RAM free. CPU: 0.1% user, 0.0% nice, 0.0% system, 0.0% interrupt, 99.8% idle Mem: 3392M Active, 5489M Inact, 390M Laundry, 25G Wired, 90G Free ARC: 19G Total, 8080M MFU, 9242M MRU, 64K Anon, 197M Header, 1570M Other 15G Compressed, 26G Uncompressed, 1.73:1 Ratio Swap: 8192M Total, 3450M Used, 4742M Free, 42% Inuse, 36K In Quitting firefox caused the swap usage to drop to just 460MB. I don't understand why it would decide to swap out so much, especially since I have vm.swap_idle_enabled set to 0. -- Rebecca