From users-return-6983-archive-asf-public=cust-asf.ponee.io@trafficserver.apache.org Fri Feb 23 12:14:28 2018 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 32559180652 for ; Fri, 23 Feb 2018 12:14:28 +0100 (CET) Received: (qmail 42397 invoked by uid 500); 23 Feb 2018 11:14:27 -0000 Mailing-List: contact users-help@trafficserver.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: users@trafficserver.apache.org Delivered-To: mailing list users@trafficserver.apache.org Received: (qmail 42387 invoked by uid 99); 23 Feb 2018 11:14:26 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Fri, 23 Feb 2018 11:14:26 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 8510C180355 for ; Fri, 23 Feb 2018 11:14:26 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 1.879 X-Spam-Level: * X-Spam-Status: No, score=1.879 tagged_above=-999 required=6.31 tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=2, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_PASS=-0.001] autolearn=disabled Authentication-Results: spamd3-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id JM-kR7zyjNNX for ; Fri, 23 Feb 2018 11:14:24 +0000 (UTC) Received: from mail-qt0-f169.google.com (mail-qt0-f169.google.com [209.85.216.169]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTPS id 2F5E45F189 for ; Fri, 23 Feb 2018 11:14:24 +0000 (UTC) Received: by mail-qt0-f169.google.com with SMTP id c19so10102014qtm.7 for ; Fri, 23 Feb 2018 03:14:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=mc2VGI+yzeMMr0LpGSxyOBcJIJQ3Q0DsWCy141MwehQ=; b=KBrbey4V9EJ8sOBv2Pq15jDJLDCEE6Km0Ab1qJsLglpqcbGjAf6XDixhDQpc4CAjb9 lZaUAhewlF7M6s0oJJIIYy52NzkdoJ+Lp39Cy3Ad9W8+EfOfGcGyw3pf2CYlqUbAVfY1 JDzJqy85qS5OqbSoajMe6O9IcjDqdaEUKpHDnSNwwgniukAtim2zFCdxJ2qqdS9ggQbA qnWXK9uj9TqRkWgdfRpAjqlvFlPFOrDPuf3pBicfK1mwe4gY//UHG7NDgXjsDkj6RQwH Vz/Z1hQazUx7XrSB8Uaq7rVGDny59w3oxi9eQN/LODs+n5uc/GWKeLDZV2P+Yv5+m5oa EeeA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=mc2VGI+yzeMMr0LpGSxyOBcJIJQ3Q0DsWCy141MwehQ=; b=Qb4Go9rc0BwQKH9bJJuBS95oI56Ur0VzIEeaPlWqLzDWu0XhtXLpdhYNB8ZxDGOXUE IL9N5mha12nObBD5nhmxcC1b6sbA/K112Hfavxpbe0p79TK9RmpoppTciMdbO9MHNowl YrQlNr5fzTWLB/ARvy0Y9k8nbf+/a2dqa0v/EP9hxC/KZrboeIxc0xYmAyvYUtbK3C9U B7fHQ1mByhXbSnKk5s9S9Vz9NZ/rNoxSnmIuf4Azbp+VKC39DD5Ipx9X5j/mLsVgUbwt t2troIH8FZNtoNegIr1kEQjWINdtHnXcuXdMFEDdGFDEshgHGjWV86wmW9VHXf9DkIAv N6Gw== X-Gm-Message-State: APf1xPCA6MISEJ3BqDvK9QGsLebSHS8OqRs1s2wnGIbmtqw5GSfuez7Q VamSRqsVYUeTCS/FR0ThbiZ3N79S6/fZeLe0uyJRHw== X-Google-Smtp-Source: AG47ELv7BeOJlldB2ahfYITaI8zN8Upnzcu+z+L9YJ6VIg/muIRK3k2ITWNmhhBcwDWPAB7eihOrx2Ce445Xv2letGU= X-Received: by 10.200.39.217 with SMTP id x25mr1890086qtx.266.1519384456606; Fri, 23 Feb 2018 03:14:16 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.171.203 with HTTP; Fri, 23 Feb 2018 03:14:16 -0800 (PST) In-Reply-To: References: From: Veiko Kukk Date: Fri, 23 Feb 2018 13:14:16 +0200 Message-ID: Subject: Re: very long cache_open_read_end - timeout To: users@trafficserver.apache.org Content-Type: multipart/alternative; boundary="001a113acf7ed038420565df42aa" --001a113acf7ed038420565df42aa Content-Type: text/plain; charset="UTF-8" Hi, Mateusz I wonder if you might experience same issue as me. https://github.com/apache/trafficserver/issues/3057 For me, solution, or I would rather call it workaround was to create volumes. Unfortunately, documentation regarding to storage performance issues/tuning is missing. Best regards, Veiko 2018-02-22 13:59 GMT+02:00 Mateusz Zajakala : > Hi, > > I have a problem - from time to time my ATS 7.2.1 has problems with > serving static files from origin, client transactions last over 10s and I > see the following diagnostic (I have enabled logging "slow requests") > > cache_open_read_begin: 0.000 cache_open_read_end: 10.640 > > Any requests to the same URL are blocked for over 10s. Restarting ATS > solves the problem. > > What does it mean? Does it have to do with open_read feature? but the > timeouts don't add... > > Any suggestions appreciated! > > Here's my records.config with configs related to avoiding thundering > herd... > > CONFIG proxy.config.cache.enable_read_while_writer INT 1 > CONFIG proxy.config.http.background_fill_active_timeout INT 0 > CONFIG proxy.config.http.background_fill_completed_threshold FLOAT > 0.000000 > CONFIG proxy.config.cache.read_while_writer.max_retries INT 5 > CONFIG proxy.config.cache.read_while_writer_retry.delay INT 200 > CONFIG proxy.config.http.cache.max_open_read_retries INT 5 > CONFIG proxy.config.http.cache.open_read_retry_time INT 200 > > CONFIG proxy.config.http.cache.open_write_fail_action INT 2 > > --001a113acf7ed038420565df42aa Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi,=C2=A0Mateusz

I wonder if you might = experience same issue as me.

For me, solution, or I would rather c= all it workaround was to create volumes.

Unfortuna= tely, documentation regarding to storage performance issues/tuning is missi= ng.

Best regards,
Veiko


2018-02= -22 13:59 GMT+02:00 Mateusz Zajakala <zajakala@gmail.com>:<= br>
Hi,

I = have a problem - from time to time my ATS 7.2.1 has problems with serving s= tatic files from origin, client transactions last over 10s and I see the fo= llowing diagnostic (I have enabled logging "slow requests")

=C2=A0cache_open_read_begin: 0.000 cache_open_read_end: 10= .640

Any requests to the same URL are blocked for over 10= s. Restarting ATS solves the problem.

What doe= s it mean? Does it have to do with open_read feature?=C2=A0 but the timeout= s don't add...

Any suggestions appreciated!
=

Here's my records.config with configs related to av= oiding thundering herd...

CONFIG proxy.config.cache.enable_read= _while_writer INT 1
CONFIG proxy.config.http.background_fill_active= _timeout INT 0
CONFIG proxy.config.http.background_fill_completed_t= hreshold FLOAT 0.000000
CONFIG proxy.config.cache.read_while_writer= .max_retries INT 5
CONFIG proxy.config.cache.read_while_writer_retr= y.delay INT 200
CONFIG proxy.config.http.cache.max_open_read_retrie= s INT 5
CONFIG proxy.config.http.cache.open_read_retry_time INT 200=

CONFIG proxy.config.http.cache.open_write_fail_action INT 2

--001a113acf7ed038420565df42aa--