Return-Path: X-Original-To: apmail-couchdb-dev-archive@www.apache.org Delivered-To: apmail-couchdb-dev-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id D6DE5938C for ; Thu, 27 Oct 2011 08:59:38 +0000 (UTC) Received: (qmail 53045 invoked by uid 500); 27 Oct 2011 08:59:38 -0000 Delivered-To: apmail-couchdb-dev-archive@couchdb.apache.org Received: (qmail 53019 invoked by uid 500); 27 Oct 2011 08:59:37 -0000 Mailing-List: contact dev-help@couchdb.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@couchdb.apache.org Delivered-To: mailing list dev@couchdb.apache.org Received: (qmail 53010 invoked by uid 99); 27 Oct 2011 08:59:34 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 27 Oct 2011 08:59:34 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS,T_TO_NO_BRKTS_FREEMAIL X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of k.cherkasoff@gmail.com designates 209.85.220.180 as permitted sender) Received: from [209.85.220.180] (HELO mail-vx0-f180.google.com) (209.85.220.180) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 27 Oct 2011 08:59:27 +0000 Received: by vcbfo11 with SMTP id fo11so3256241vcb.11 for ; Thu, 27 Oct 2011 01:59:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; bh=Wu2hf62HxhkGuEfEGLZRIPKlvQ58d3MsoMFaVDGrDsw=; b=wi3qlbEPc8H/aJjIeB2PFIwlX88RitHRvZuQWfGHANhUDXzvl2JItsEaWnX8cjB+Zd q9fznWOR8+gQxQDWUg1+BPqGG533+iufRBswWsLfKKQ/do/BDv0RbR2Pbq4Obp7dgxcG rVFoL2w1iGh3/TZzxib8lk4EBNJQnnUjU9SNw= MIME-Version: 1.0 Received: by 10.220.73.84 with SMTP id p20mr931150vcj.8.1319705947193; Thu, 27 Oct 2011 01:59:07 -0700 (PDT) Received: by 10.220.169.69 with HTTP; Thu, 27 Oct 2011 01:59:07 -0700 (PDT) In-Reply-To: References: <1C9ABC85-EDBD-42AB-B72A-3682977A9971@gmail.com> Date: Thu, 27 Oct 2011 12:59:07 +0400 Message-ID: Subject: Re: High latency (40ms) and low request rate (10 rps) under windows From: Konstantin Cherkasoff To: dev@couchdb.apache.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable > CouchDB is smart enough to collect writes from multiple concurrent client= s into a "group commit" and > issue only one fsync to durably store all of them in one go. =C2=A0It's a= bit like generating a _bulk_docs request under the hood. > That's the main reason you see the jump from 10/sec to 300/sec. Hmm... sounds reasonable. Thank you. -- Konstantin Cherkasoff