Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.89) (envelope-from ) id 1epFNP-0000Ym-QC for pgsql-performance@arkaria.postgresql.org; Fri, 23 Feb 2018 15:35:11 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1epFNO-0003La-PV for pgsql-performance@arkaria.postgresql.org; Fri, 23 Feb 2018 15:35:10 +0000 Received: from makus.postgresql.org ([2001:4800:1501:1::229]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1epFNO-0003LJ-CD for pgsql-performance@lists.postgresql.org; Fri, 23 Feb 2018 15:35:10 +0000 Received: from mail-yb0-x235.google.com ([2607:f8b0:4002:c09::235]) by makus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.89) (envelope-from ) id 1epFNH-0003Tx-Tp for pgsql-performance@lists.postgresql.org; Fri, 23 Feb 2018 15:35:09 +0000 Received: by mail-yb0-x235.google.com with SMTP id u5-v6so1731599ybf.4 for ; Fri, 23 Feb 2018 07:35:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=MYDbLrJHAtdmrcdfRAiJrYA0rGZC/j+WUuNR8/ZUU5I=; b=jkmqNzfr2er4/3GPkHTJn61qtbKxQ5W5VLB1rAT8mVRZIEYWnkAYkch3OI8jd0T07I YcLpMk3CkbD0MW0wZo1FT8z1pcxe6oMMn6ScTT/SUr70c9znPW93t8neo/D+peFukUYs DfpGKg85DzY10ckCmU5pJyg4hfXgXfos1AlKkmXGAhCMzwyXtyeG+CUI719hM+ggtN3U /znQaUBA7dN1mgcTmrTWeO47OxOKyGN+vvhLg30KEFHfXZupMXVvNuct+3aw5tpadOpp XWmNjzOHglI2S9pU5+WWRBpf7N/oqLOYrUE2+gCPVDtt/MGRYNjOD2r8LxjkaXSovTPB Bi9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=MYDbLrJHAtdmrcdfRAiJrYA0rGZC/j+WUuNR8/ZUU5I=; b=mh2q0oerbZeBgnjfIUdpHFYU4bEI0pUX6oUs92u78LZJ0HGDq5RDrQLU378/uDEhMA Upl6HonBgZvlLyeq2aHadgCxiNqRZAliLZ/NplycTpuuTvzz/pz3Y8WlgaY/zxOahnTL 0wwNZyvuHg/h2q/q2pkS1swv9jrwC1A2bxO7bAlIOvWZCtkamhVXxLU2UTwrK1XRyc2J MiOaz/b6AbyOOAgLYkUk6IbpbzEB25jvqlIJet41XQTuQq24wCgQ3Uf53sZQ7YuZA6yb AgRYqKk/Ngkrn7wH91RLiZ5nrjwcslGNVhvLyBitEPHsAHUIPKriFIpVEbqq6S+VYGZ0 gjsA== X-Gm-Message-State: APf1xPCS30YFW/yGDS7xzXDULCSosnDMd0kQ5zDEOLWWbM2HGtHajhps l9s8e65iF6HBcLlFEX1Jf6OUqIrk X-Google-Smtp-Source: AG47ELtLBJDEX/NTSYJctm04QUoAfyD1hgTPGhYrDwuhzCu53+Ehy0RRwNjr5OaeQIszyq9BIbZoFw== X-Received: by 2002:a25:d9c6:: with SMTP id q189-v6mr1292629ybg.343.1519400102501; Fri, 23 Feb 2018 07:35:02 -0800 (PST) Received: from [192.168.1.183] ([193.93.78.27]) by smtp.gmail.com with ESMTPSA id g139sm97058ywe.51.2018.02.23.07.35.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 23 Feb 2018 07:35:01 -0800 (PST) Subject: Re: effective_io_concurrency on EBS/gp2 To: Rick Otten Cc: Claudio Freire , hzzhangjiazhi , Gary Doades , "pgsql-performance@lists.postgresql.org" References: <6c7a45df-f6ab-f2ce-6f84-9555864f6c86@gmail.com> <768e3a56-46ed-3dd1-8722-953a47857a35@gmail.com> <014801d39a99$d4c32930$7e497b90$@gpdnet.co.uk> <8fb758a1-d7fa-4dcc-fb5b-07a992ae6a32@gmail.com> <534b557c-3658-6d0f-2330-34a78da57e2f@gmail.com> <9122FC8B-2129-4E10-807F-F9F34117A156@corp.netease.com> <85a21d95-a776-4c1c-3223-5568864df3f3@gmail.com> <7895b3f0-0871-2b04-d3a3-3ade175e7212@gmail.com> <4948d2de-33c1-1c98-df9e-8b5541cd7eee@gmail.com> <364c0960-fd84-da6d-ed57-51ef268f628a@gmail.com> From: Vitaliy Garnashevich Message-ID: Date: Fri, 23 Feb 2018 17:35:06 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Precedence: bulk > I noticed that the recent round of tests being discussed never > mentioned the file system used.  Was it XFS?  Does changing the > agcount change the behaviour? It was ext4. Regards, Vitaliy