From: David Bremner <david@tethera.net>
Date: Fri, 8 Apr 2016 00:40:59 +0000 (+2100)
Subject: Re: slowdown in notmuch perf suite with xapian 1.3.5
X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=2053075c6103b08069fbee418a1ad09fcc411291;p=notmuch-archives.git

Re: slowdown in notmuch perf suite with xapian 1.3.5
---

diff --git a/50/f570ebecc4bb32e7b8bb212ba5d125edec94e9 b/50/f570ebecc4bb32e7b8bb212ba5d125edec94e9
new file mode 100644
index 000000000..ddb641ca6
--- /dev/null
+++ b/50/f570ebecc4bb32e7b8bb212ba5d125edec94e9
@@ -0,0 +1,76 @@
+Return-Path: <david@tethera.net>
+X-Original-To: notmuch@notmuchmail.org
+Delivered-To: notmuch@notmuchmail.org
+Received: from localhost (localhost [127.0.0.1])
+ by arlo.cworth.org (Postfix) with ESMTP id CAB706DE02B5
+ for <notmuch@notmuchmail.org>; Thu,  7 Apr 2016 17:41:11 -0700 (PDT)
+X-Virus-Scanned: Debian amavisd-new at cworth.org
+X-Spam-Flag: NO
+X-Spam-Score: -0.02
+X-Spam-Level: 
+X-Spam-Status: No, score=-0.02 tagged_above=-999 required=5 tests=[AWL=-0.009,
+  SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=disabled
+Received: from arlo.cworth.org ([127.0.0.1])
+ by localhost (arlo.cworth.org [127.0.0.1]) (amavisd-new, port 10024)
+ with ESMTP id d0NHCWl4bYP8 for <notmuch@notmuchmail.org>;
+ Thu,  7 Apr 2016 17:41:03 -0700 (PDT)
+Received: from fethera.tethera.net (fethera.tethera.net [198.245.60.197])
+ by arlo.cworth.org (Postfix) with ESMTPS id 8E0C16DE0134
+ for <notmuch@notmuchmail.org>; Thu,  7 Apr 2016 17:41:03 -0700 (PDT)
+Received: from remotemail by fethera.tethera.net with local (Exim 4.84)
+ (envelope-from <david@tethera.net>)
+ id 1aoKU2-00009Q-U5; Thu, 07 Apr 2016 20:41:10 -0400
+Received: (nullmailer pid 28044 invoked by uid 1000);
+ Fri, 08 Apr 2016 00:40:59 -0000
+From: David Bremner <david@tethera.net>
+To: notmuch@notmuchmail.org, xapian-discuss@lists.xapian.org
+Subject: Re: slowdown in notmuch perf suite with xapian 1.3.5
+In-Reply-To: <20160407232537.GB29434@survex.com>
+References: <87twjd639d.fsf@zancas.localnet>
+ <20160407232537.GB29434@survex.com>
+User-Agent: Notmuch/0.21+99~gd93d377 (http://notmuchmail.org) Emacs/24.5.1
+ (x86_64-pc-linux-gnu)
+Date: Thu, 07 Apr 2016 21:40:59 -0300
+Message-ID: <87h9fd53vo.fsf@zancas.localnet>
+MIME-Version: 1.0
+Content-Type: text/plain
+X-BeenThere: notmuch@notmuchmail.org
+X-Mailman-Version: 2.1.20
+Precedence: list
+List-Id: "Use and development of the notmuch mail system."
+ <notmuch.notmuchmail.org>
+List-Unsubscribe: <https://notmuchmail.org/mailman/options/notmuch>,
+ <mailto:notmuch-request@notmuchmail.org?subject=unsubscribe>
+List-Archive: <http://notmuchmail.org/pipermail/notmuch/>
+List-Post: <mailto:notmuch@notmuchmail.org>
+List-Help: <mailto:notmuch-request@notmuchmail.org?subject=help>
+List-Subscribe: <https://notmuchmail.org/mailman/listinfo/notmuch>,
+ <mailto:notmuch-request@notmuchmail.org?subject=subscribe>
+X-List-Received-Date: Fri, 08 Apr 2016 00:41:11 -0000
+
+Olly Betts <olly@survex.com> writes:
+
+>
+> So the T00-new.sh numbers make sense - there's more work to do, and
+> we need to read existing positional data more to insert the new stuff,
+> so the increased reads and writes make sense.
+>
+> But guessing at what the other two tests do, I wouldn't expect them to
+> be affected by this.
+
+The non-optimized-away cases of T02-tag just adding and deleting terms
+to each document with term Tmail
+
+> I'm also a bit puzzled by how glass can manage not to read any data
+> for "dump *", and several tests seem to not read or write anything
+> for either backend.  What exactly are the "In/Out" numbers?
+
+that's just the output from /usr/bin/time -f '%e\t%U\t%S\t%M\t%I/%O'
+
+The manual describes them as "number of file system
+inputs/outputs". From looking at the source, they correspond to
+ru_inblock and ru_oublock fields from the getrusage call. AFAIU, that
+means the number of non-cached read/writes.
+
+d
+