From owner-freebsd-questions@FreeBSD.ORG Thu Oct 9 04:28:06 2014 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D2F97C0F for ; Thu, 9 Oct 2014 04:28:06 +0000 (UTC) Received: from mail-ig0-x232.google.com (mail-ig0-x232.google.com [IPv6:2607:f8b0:4001:c05::232]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8CF29E2A for ; Thu, 9 Oct 2014 04:28:06 +0000 (UTC) Received: by mail-ig0-f178.google.com with SMTP id h3so1968692igd.5 for ; Wed, 08 Oct 2014 21:28:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ycombinator.com; s=google; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=eK7u71Z8MR7L1o3fUQDokKfj9C9bBt2xlkR7XuKwlIo=; b=Hg5lDUQQ70ZZApKoZCo1iMtRWuoDdptfsOO5GF3VewJS9SK4FsyJ/v4KRFXJD14Xk4 wS4bKleWA4HnEgRnvtqD/17Ijg+XMotNw1rh71Op/4OZJFxBZunLkjqhuGY/soe1ddNJ c/XQWw0+MeQ9eQv/yJT68Lej3Zpi6wf5MdlKE= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=eK7u71Z8MR7L1o3fUQDokKfj9C9bBt2xlkR7XuKwlIo=; b=mAv9INVWGIEiwgcGxp4ewzz45S/Rj2AeojSi3iGvnlUP4D3B6QB3+SUOr93wrd9OUx s7jSiyusaxe88xRs4NAtNW/OenArBjigT5pOWqGIhv8yR5qhgiWqoQiXtD4FV7phP3DE fu4Az0ilgEGhPkXkJrxrzx5xDv/jRQybQ3GsrKKd3prJdduNL9GtJ5Fnnac15RDP0FUY R7DiqnVgQx20hB7yzz6rUcRdbtee4Q0bKQSorzZb4fTif4hqP93++HjiWRCBxMwUZAkE R9t4FHG6sMZ3XQUzN2CTVqzXIjElVWDtQlp8j1BRoZjncQf1Gsnq5rkUV9fXEsiun9KI Iaag== X-Gm-Message-State: ALoCoQkWUc6DjcKeFqHWO9jXpgLqadVRZ8Fmvmndfi8ZBoN79fVGwIV46f6MX9jGbghQcd1q9bAf MIME-Version: 1.0 X-Received: by 10.70.10.37 with SMTP id f5mr14484098pdb.5.1412828885659; Wed, 08 Oct 2014 21:28:05 -0700 (PDT) Received: by 10.70.131.130 with HTTP; Wed, 8 Oct 2014 21:28:05 -0700 (PDT) In-Reply-To: References: <1412732931033.813626ca@Nodemailer> Date: Wed, 8 Oct 2014 21:28:05 -0700 Message-ID: Subject: Re: Next Steps to Debug ZFS Hang? From: Nick Sivo To: FreeBSD Questions Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Oct 2014 04:28:06 -0000 Hi Daniel, > Not sure if this will be helpful, but at least it shouldn't hurt: When was > the last time you ran a scrub? Also, how much RAM do you have and where is > your swap? (The only times I've had permanent hangs from ZFS was when I ran > out of RAM and was trying to swap to ZFS...) The server has 64GB ECC RAM, and no swap at the moment. I've since rebooted the box, but a scrub today revealed no errors, and there was nothing in the console or any log files about disk or controller errors or timeouts. I was able to get kernel call stacks with procstat: https://gist.github.com/kogir/49ff76f95b0b3be3e80e Thanks, Nick