From owner-freebsd-hackers@freebsd.org Sat Jun 17 06:49:22 2017 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A27B4BF2AA0 for ; Sat, 17 Jun 2017 06:49:22 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: from mail-wm0-x22b.google.com (mail-wm0-x22b.google.com [IPv6:2a00:1450:400c:c09::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 3694581F20 for ; Sat, 17 Jun 2017 06:49:22 +0000 (UTC) (envelope-from amvandemore@gmail.com) Received: by mail-wm0-x22b.google.com with SMTP id u195so25776218wmd.1 for ; Fri, 16 Jun 2017 23:49:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=VkJwrYLHm0TSnfk1rBF5uxAN1Dc8ksvjQXnMx9m/NgY=; b=Mbr8GXWT1Zu0dFPrpFu9Ve/n/7ydlzcm87onPEt9SMfql5u7yFvtqx4MUVmK6KgL03 ayNU6cczetEzMUv/Q78tmcGnFAFYNVUUNzaEJMSJkg2JI88VUtfvrbxHBdzsZmRdVv6i L2GxGJrLPyYfx7o91TcP2vF0I74uOF3baubrw8R/3wF2s5GHyeZV0vbuka9h5lxlbgQG HJUpuqQQMq7Ujk0HzA3nwMNkBUBGCCzsbne6CSAWVU61VL+NaeLceTBfgWnwWo6lBYjn dH2KI5J68Wtn8meGBiwfRKqmzm7zgTk0wOr2CeBuEpipcIWy8eNGQslJzMsjCjns6uLq Oidg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=VkJwrYLHm0TSnfk1rBF5uxAN1Dc8ksvjQXnMx9m/NgY=; b=oNONTYFT0N7RKNS5EQYRwV8tQ0TeCk690LQ+DLipScFjKfegGfOoiAXCNVQETNF682 8S9Asg/LPaIKctB+yt0o0UhkqzpdLg9WIrgbdLFAgUPpY3XkIDIf0PYR5mO0ZozPbfZo cb2GznVpGu4Zv9OYQ2KcA5mmrmSuKhYfiTPBBB744nLNHtQVa9w4s4MpRJwcQRwYIQ1z IifGwAdgDq8VgmET5ROhJDWV4vgKGk1bvh8H8spm3M0iXjurKh0lkRS5sEjQOQCa/x0E JkOfY8Nu9/NrcU6WfSeiPpKeP8vsRRtceD7LM2V9RuKzY6J5F5pk3e08Q0i37NhVruoB WO8Q== X-Gm-Message-State: AKS2vOzFJJVPzkNCIa0z8rV/9qcNEDGy9EQ4bADtK4BGKxn9WkpAwnB2 H/XJc7uuOaYPipB2icFT/v9Zl+AWME6A X-Received: by 10.80.137.136 with SMTP id g8mr9724361edg.125.1497682159225; Fri, 16 Jun 2017 23:49:19 -0700 (PDT) MIME-Version: 1.0 Received: by 10.80.140.162 with HTTP; Fri, 16 Jun 2017 23:49:18 -0700 (PDT) In-Reply-To: <4561529b83ce4270b09aa0e3b12f299f@BLUPR58MB002.032d.mgd.msft.net> References: <4561529b83ce4270b09aa0e3b12f299f@BLUPR58MB002.032d.mgd.msft.net> From: Adam Vande More Date: Sat, 17 Jun 2017 01:49:18 -0500 Message-ID: Subject: Re: FreeBSD10 Stable + ZFS + PostgreSQL + SSD performance drop < 24 hours To: "Caza, Aaron" Cc: "freebsd-hackers@freebsd.org" Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.23 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.23 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 Jun 2017 06:49:22 -0000 On Sat, Jun 17, 2017 at 12:16 AM, Caza, Aaron wrote: > > Regarding this issue, I've now conducted testing using merely a FreeBSD > 10.3 Stable amd64 GENERIC kernel and using dd to read a large file. The > following is a log, taken hourly, of the degradation which occurred at just > over 9 hours of uptime. As the original is quite large, I've removed some > sections; however, these can be supplied if desired. > Supplied are the initial dmesg and zpool status, logged only on startup, > followed by uptime, uname -a, and zfs-stats -a output, each of which are > logged hourly. > What does this say? # zpool get all