From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id C045A3CB35 for ; Thu, 7 Apr 2022 12:53:25 -0400 (EDT) Received: by mail-ed1-x536.google.com with SMTP id f18so7135925edc.5 for ; Thu, 07 Apr 2022 09:53:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=VpLFs0iOAWBtBB+7267Q+nEudXEaInF0pQm11a3802k=; b=KlKMOmkHRAeRWu6ZyqmqOIba4CfWaHigXYyWvDskOeKWaj2tSdqP7UpoRcrDDoJvuW xRLt924ZWEwx+N8vKsWUCETOKTlkF4GXNOVlE2hKBxaWHfGounkwmi9SPsgghqRPdz9g 1+ARk/mArdDhEehoQGLDxgypZC0perEIINRW4CmXH8oOxHecjFc9LShqWdN5aYbQ93NO E47F0f6WmaYEK8QDZXWFDmCD7bLsInr+7fDXp2fx2pS6A6eSOtCGCzBrxj7Bb34ojEmQ 1rNB9574sQ0joe6HJ4U5U9At6H8zPRBDYJW6ma/dBD1rPAhVCDsTuVthC3LXjmlQjz+G +xDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-transfer-encoding; bh=VpLFs0iOAWBtBB+7267Q+nEudXEaInF0pQm11a3802k=; b=3Vs9Iw9CagMUhGwvFORiHTZVeebvdD3F2TtUE+QyxqTaF8KLypWciFmlxaICC4zUiT 4uqLY+q/hdXui9WdRbiN6Zus7i6RTJBv7/uSjZAQBJecjBzBelvTfBoa0/PUXg6Ip4J9 Kq8HYCc9turvVW6RgsEalrKbJIYhysgx30JpzvPEte9h3ZBO4dpWrEcgz+LQeWgi7cqp Y4nzHJoz92MNoN8847Qe9eDAa3xwWadmc56ZLwUQWUSaqnCcolryvUtbgCXmjY8EqtLT 4WyT3b754PWw/LG9pxNPD1+4yiSYhN8lnAuP52sNKLzgx+pnioYmKU3qp8I+4nSi/EGw xk5g== X-Gm-Message-State: AOAM531kLeJ/17ztsDefwCmK/+ZwhWaj/Fr/g9Juc3X3YlNYLm+xDlnv 1PN6p+0hhpFy9FT9vrJEPWWC99dw7ZvLdK9bH63RY7zCqCM2Rg== X-Google-Smtp-Source: ABdhPJwBZnqnLu/YySGSrylvrrZyFNVVSb/FsZZlY1FzK480sDvopTmMbwVH87hZnLvlZfolla6B/sgXPqrtrjbusLI= X-Received: by 2002:a05:6402:35c7:b0:41d:1a10:4760 with SMTP id z7-20020a05640235c700b0041d1a104760mr60606edc.28.1649350404554; Thu, 07 Apr 2022 09:53:24 -0700 (PDT) MIME-Version: 1.0 From: Dave Taht Date: Thu, 7 Apr 2022 09:53:13 -0700 Message-ID: To: bloat Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: [Bloat] gitlab network optimizations X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Apr 2022 16:53:25 -0000 Most cloud operations websites are kept internal. gitlab's is not, which is pretty cool. In looking over this: https://gitlab.com/gitlab-com/gl-infra/production/-/issues/6768 They are tracking tcp syn retransmits, but not drops or other congestion control related info. And also sysctl net.ipv4.tcp_notsent_lowat=3D4294967295; where we've been getting good results with that set as low as 32k. Anyone know anyone at gitlab? --=20 I tried to build a better future, a few times: https://wayforward.archive.org/?site=3Dhttps%3A%2F%2Fwww.icei.org Dave T=C3=A4ht CEO, TekLibre, LLC