From owner-freebsd-fs@FreeBSD.ORG Thu Oct 15 22:24:04 2009 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 68B2C10656A3 for ; Thu, 15 Oct 2009 22:24:04 +0000 (UTC) (envelope-from grarpamp@gmail.com) Received: from ey-out-2122.google.com (ey-out-2122.google.com [74.125.78.26]) by mx1.freebsd.org (Postfix) with ESMTP id 02C398FC20 for ; Thu, 15 Oct 2009 22:24:03 +0000 (UTC) Received: by ey-out-2122.google.com with SMTP id 9so326897eyd.9 for ; Thu, 15 Oct 2009 15:24:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=7Xyl4BI+bzxiKUCngoKrVmypjxaaLugnnFlflmggl9Y=; b=acQvZbTK90oAHT0svEP/XAGvNgwf6E18N0EEEnwnc0PEmI+VcZC3ZyRFfA33iuyrow q31lFtYJgtzENFEe4XNE2byD8WVKZdk4aSvorSliSG6wXjVqir1dALH8MBziJvOL5NKI FnSiOwcSuhVKBTDfw7cHtJ7PFS09Bl43rIfOk= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=b+JBiS77pa6R9XRywKZMO6cqrZ0ktmwf3ykfTluoFcvx9aOWT+qdA0BErpR+9zvyeq ArcdGSEOCWWWODrSu1sn5xF2H6hPUNEO+hgHAiem2znFbgin/4FHUSDgSAStwS+I4tES BpyoJ82l/a9/v5KHMZj9lt+lThVkowvx7kfAY= MIME-Version: 1.0 Received: by 10.216.86.4 with SMTP id v4mr293723wee.200.1255645442895; Thu, 15 Oct 2009 15:24:02 -0700 (PDT) Date: Thu, 15 Oct 2009 18:24:02 -0400 Message-ID: From: grarpamp To: freebsd-fs@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: ZFS threads? X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2009 22:24:04 -0000 I don't know about reducing them directly, maybe vfs.zfs.zfetch.max_streams. On mine it's 8 which might be that 0 through 7 you see. This system has 9 zfs mountpoints and 104 spa_zio* threads. So you might try cutting mountpoints if possible.