From: Alexey Lyashkov Subject: Re: some large dir testing results Date: Mon, 24 Apr 2017 21:29:49 +0300 Message-ID: <7A61F035-8D10-4FE4-B4CA-1E6C87CE5AB4@gmail.com> References: <52B4B404-9FE0-4586-A02A-3451AA5BE089@gmail.com> <9166D509-BCF3-4F77-8461-1318C2B121D6@dilger.ca> Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Cc: linux-ext4 , Artem Blagodarenko To: Andreas Dilger Return-path: Received: from mail-io0-f180.google.com ([209.85.223.180]:34415 "EHLO mail-io0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S976113AbdDXS3z (ORCPT ); Mon, 24 Apr 2017 14:29:55 -0400 Received: by mail-io0-f180.google.com with SMTP id a103so199299337ioj.1 for ; Mon, 24 Apr 2017 11:29:54 -0700 (PDT) In-Reply-To: <9166D509-BCF3-4F77-8461-1318C2B121D6@dilger.ca> Sender: linux-ext4-owner@vger.kernel.org List-ID: > 21 =D0=B0=D0=BF=D1=80. 2017 =D0=B3., =D0=B2 23:58, Andreas Dilger = =D0=BD=D0=B0=D0=BF=D0=B8=D1=81=D0=B0=D0=BB(=D0=B0): based on current investigation step, journal is bottleneck now. bd2/md66-8-21787 [000] .... 439933.758608: jbd2_commit_logging: dev 9,66 = transaction 1311 sync 0 jbd2/md66-8-21787 [008] .... 439940.816308: jbd2_run_stats: dev = 9,66 tid 1311 wait 0 request_delay 0 running 5000 locked 0 flushing 0 = logging 7060 handle_count 167302 blocks 170369 blocks_logged 170871 so 7s is processing, but sometimes it eats a ~100s. 41s jbd2/md66-8-21787 [001] .... 437328.447185: jbd2_start_commit: dev 9,66 = transaction 1197 sync 0 jbd2/md66-8-21787 [007] .... 437369.618933: jbd2_run_stats: dev 9,66 tid = 1197 wait 0 request_delay 0 running 5358 locked 5352 flushing 0 logging = 35838 handle_count 206731 blocks 206433 blocks_logged 207041 jbd2/md66-8-21787 [007] .... 437369.618936: jbd2_end_commit: dev = 9,66 transaction 1197 sync 0 head 1192 ~100s jbd2/md66-8-21787 [000] .... 435933.607806: jbd2_run_stats: dev 9,66 tid = 1135 wait 0 request_delay 0 running 7590 locked 114 flushing 0 logging = 22 handle_count 0 blocks 0 blocks_logged 0 jbd2/md66-8-21787 [011] .... 436030.850489: jbd2_run_stats: dev 9,66 = tid 1136 wait 0 request_delay 0 running 5320 locked 3485 flushing 0 = logging 88482 handle_count 123338 blocks 126810 blocks_logged 127183=