From owner-freebsd-questions@freebsd.org Mon Jun 14 19:09:22 2021 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id AF19C649AF1 for ; Mon, 14 Jun 2021 19:09:22 +0000 (UTC) (envelope-from johnl@iecc.com) Received: from gal.iecc.com (gal.iecc.com [IPv6:2001:470:1f07:1126:0:43:6f73:7461]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "gal.iecc.com", Issuer "Let's Encrypt Authority X3" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4G3gwx6Svgz4Z2C for ; Mon, 14 Jun 2021 19:09:21 +0000 (UTC) (envelope-from johnl@iecc.com) Received: (qmail 50771 invoked from network); 14 Jun 2021 19:09:20 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=iecc.com; h=date:message-id:from:to:cc:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:cleverness; s=c64d.60c7a960.k2106; bh=Q1O2Uh4+M9z0Y7PpkUBJg9zBbNcR2NefC4uF3B4pMCw=; b=rKCa7vtny8xPwl8/bJ0AnASq+owU8LV7Re5cYmKzPyiJhP7fvM+90H+IoQMYyep2MQ7QbXjEs/hEOEIGUwUaDRqmsJcn94z7U0pLtSfK4Jf8ieQjoXLX8SMzRONexpEvwosiT2Ar7X/2tvFq3aMilIiWgOswgSlP269/UP+jxcZIoPNHY+7pH+h2XinqW4c8xEojfKiYIB2O9Roqr6u/gqp4hhTiqtZm26bBP9GrMUMV2UxBN5rgbySF9RoHKMXIg6YqMHzPsGYOQBUub+HBB3SRFm+Bol6B1ujEXU0wxM/zmRwtCrnuBKMGrpnZ/JbxSw3z3mN31D4oyzT6YgJ74A== Received: from ary.qy ([IPv6:2001:470:1f07:1126::78:696d:6170]) by imap.iecc.com ([IPv6:2001:470:1f07:1126::78:696d:6170]) with ESMTPS (TLS1.2 ECDHE-RSA AES-256-GCM AEAD) via TCP6; 14 Jun 2021 19:09:20 -0000 Received: by ary.qy (Postfix, from userid 501) id 165D610C902F; Mon, 14 Jun 2021 15:09:17 -0400 (EDT) Date: 14 Jun 2021 15:09:17 -0400 Message-Id: <20210614190918.165D610C902F@ary.qy> From: "John Levine" To: freebsd-questions@freebsd.org Cc: rfg@tristatelogic.com Subject: Re: Periodic tasks are not nice In-Reply-To: <26813.1623665962@segfault.tristatelogic.com> Organization: Taughannock Networks X-Headerized: yes Cleverness: minimal Mime-Version: 1.0 Content-type: text/plain; charset=utf-8 Content-transfer-encoding: 8bit X-Rspamd-Queue-Id: 4G3gwx6Svgz4Z2C X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=none (invalid DKIM record) header.d=iecc.com header.s=c64d.60c7a960.k2106 header.b=rKCa7vtn; dmarc=pass (policy=none) header.from=iecc.com; spf=pass (mx1.freebsd.org: domain of johnl@iecc.com designates 2001:470:1f07:1126:0:43:6f73:7461 as permitted sender) smtp.mailfrom=johnl@iecc.com X-Spamd-Result: default: False [-3.30 / 15.00]; RCVD_TLS_ALL(0.00)[]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; R_SPF_ALLOW(-0.20)[+ip6:2001:470:1f07:1126::/64]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; HAS_ORG_HEADER(0.00)[]; SPAMHAUS_ZRD(0.00)[2001:470:1f07:1126:0:43:6f73:7461:from:127.0.2.255]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DKIM_TRACE(0.00)[iecc.com:~]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[2001:470:1f07:1126:0:43:6f73:7461:from]; NEURAL_HAM_SHORT(-1.00)[-1.000]; R_DKIM_PERMFAIL(0.00)[iecc.com:s=c64d.60c7a960.k2106]; DMARC_POLICY_ALLOW(-0.50)[iecc.com,none]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RBL_DBL_DONT_QUERY_IPS(0.00)[2001:470:1f07:1126:0:43:6f73:7461:from]; ASN(0.00)[asn:6939, ipnet:2001:470::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; MAILMAN_DEST(0.00)[freebsd-questions] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Jun 2021 19:09:22 -0000 It appears that Ronald F. Guilmette said: >Shouldn't all these sorts of background taks be nice'd? Maybe. My not very new server has 12 CPUs (six on each chip) so there is always an available CPU so the speed limit is the disk, not the processor. Nice only affects CPU scheduling.