Linux Performance Analysis in 60,000 Milliseconds
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Web Vmstat Any Distros, Especially Here’S Where Web Vmstat Comes Those Targeted at In
FOSSPICKS Sparkling gems and new releases from the world of FOSSpicks Free and Open Source Software Mike Saunders has spent a decade mining the internet for free software treasures. Here’s the result of his latest haul… Shiny statistics in a browser Web VMStat any distros, especially Here’s where Web VMStat comes those targeted at in. It’s a system monitor that runs Madvanced users, ship an HTTP server, so you can connect with shiny system monitoring tools to it via a web browser and see on the desktop. Conky is one such fancy CSS-driven charts. Before you tool, while GKrellM was all the rage install it, you’ll need to get the in the last decade, and they are websocketd utility, which you can genuinely useful for keeping tabs find at https://github.com/ on your boxes, especially when joewalnes/websocketd. Helpfully, you’re an admin in charge of the developer has made pre- various servers. compiled executables available, so Now, pretty much all major you can just grab the 32-bit or distros include a useful command 64-bit tarball, extract it and there line tool for monitoring system you have it: websocketd. (Of course, Here’s the standard output for vmstat – not very interesting, right? resource usage: vmstat. Enter if you’re especially security vmstat 1 in a terminal window and conscious, you can compile it from copy the aforementioned you’ll see a regularly updating (once its source code.) websocketd into the same place. per second) bunch of statistics, Next, clone the Web VMStat Git Then just enter: showing CPU usage, free RAM, repository (or grab the Zip file and ./run swap usage and so forth. -
Oracle® Linux 7 Monitoring and Tuning the System
Oracle® Linux 7 Monitoring and Tuning the System F32306-03 October 2020 Oracle Legal Notices Copyright © 2020, Oracle and/or its affiliates. This software and related documentation are provided under a license agreement containing restrictions on use and disclosure and are protected by intellectual property laws. Except as expressly permitted in your license agreement or allowed by law, you may not use, copy, reproduce, translate, broadcast, modify, license, transmit, distribute, exhibit, perform, publish, or display any part, in any form, or by any means. Reverse engineering, disassembly, or decompilation of this software, unless required by law for interoperability, is prohibited. The information contained herein is subject to change without notice and is not warranted to be error-free. If you find any errors, please report them to us in writing. If this is software or related documentation that is delivered to the U.S. Government or anyone licensing it on behalf of the U.S. Government, then the following notice is applicable: U.S. GOVERNMENT END USERS: Oracle programs (including any operating system, integrated software, any programs embedded, installed or activated on delivered hardware, and modifications of such programs) and Oracle computer documentation or other Oracle data delivered to or accessed by U.S. Government end users are "commercial computer software" or "commercial computer software documentation" pursuant to the applicable Federal Acquisition Regulation and agency-specific supplemental regulations. As such, the use, reproduction, duplication, release, display, disclosure, modification, preparation of derivative works, and/or adaptation of i) Oracle programs (including any operating system, integrated software, any programs embedded, installed or activated on delivered hardware, and modifications of such programs), ii) Oracle computer documentation and/or iii) other Oracle data, is subject to the rights and limitations specified in the license contained in the applicable contract. -
Chapter 3. Booting Operating Systems
Chapter 3. Booting Operating Systems Abstract: Chapter 3 provides a complete coverage on operating systems booting. It explains the booting principle and the booting sequence of various kinds of bootable devices. These include booting from floppy disk, hard disk, CDROM and USB drives. Instead of writing a customized booter to boot up only MTX, it shows how to develop booter programs to boot up real operating systems, such as Linux, from a variety of bootable devices. In particular, it shows how to boot up generic Linux bzImage kernels with initial ramdisk support. It is shown that the hard disk and CDROM booters developed in this book are comparable to GRUB and isolinux in performance. In addition, it demonstrates the booter programs by sample systems. 3.1. Booting Booting, which is short for bootstrap, refers to the process of loading an operating system image into computer memory and starting up the operating system. As such, it is the first step to run an operating system. Despite its importance and widespread interests among computer users, the subject of booting is rarely discussed in operating system books. Information on booting are usually scattered and, in most cases, incomplete. A systematic treatment of the booting process has been lacking. The purpose of this chapter is to try to fill this void. In this chapter, we shall discuss the booting principle and show how to write booter programs to boot up real operating systems. As one might expect, the booting process is highly machine dependent. To be more specific, we shall only consider the booting process of Intel x86 based PCs. -
Marine News Iucn Global Marine and Polar Programme
MARINE NEWS IUCN GLOBAL MARINE AND POLAR PROGRAMME ISSUE 12 - NOVEMBER 2015 Climate Change Adaptation Special MARINE NEWS Issue 12 -November 2015 In this Issue... IUCN Global Marine and Polar Programme 1 Editorial Rue Mauverney 28 By Pierre-Yves Cousteau 1196 Gland, Switzerland Tel +4122 999 0217 Fax +4122 999 0002 2 Overview of the GMPP www.iucn.org/marine 4 Global Threats Editing and design: Oceans and Climate Change, Alexis McGivern © Pierre-Yves Cousteau Ocean Warming, Ocean Acidifi- Back issues available cation, Plastic pollution The ocean is our future; for better or externalisation of environmental costs beginning of the “digitization of the at: www.iucn.org/about/ for worse. (to abolish the business practice of Earth”. How will Big Data shape con- work/programmes/marine/ deferring onto society and natural servation, sustainable development gmpp_newsletter “There are no passengers on space- capital all the negative impacts of and decision making? 12 Global Coasts ship Earth. We are all crew.” - Mar- economic activities), and the cogni- Front cover: © XL Catlin shall McLuhan, 1965. tive frameworks and values that we We are living a fascinating time, where Blue Solutions and Blue Forests, are conditioned for by mainstream the immense challenges mankind fac- Seaview Survey The advent of agriculture over 10,000 media and politicians (obsession with es are matched by the technological Vamizi, Maldives, WGWAP, BEST years ago had a profound socio-eco- financial success, personal image ability to innovate and adapt. The bar- Top picture: A fire coral be- Initiative nomic impact on mankind. Today and hedonism). These challenges riers that hold us back from designing fore and after bleaching. -
Performance, Scalability on the Server Side
Performance, Scalability on the Server Side John VanDyk Presented at Des Moines Web Geeks 9/21/2009 Who is this guy? History • Apple // • Macintosh • Windows 3.1- Server 2008R2 • Digital Unix (Tru64) • Linux (primarily RHEL) • FreeBSD Systems Iʼve worked with over the years. Languages • Perl • Userland Frontier™ • Python • Java • Ruby • PHP Languages Iʼve worked with over the years (Userland Frontier™ʼs integrated language is UserTalk™) Open source developer since 2000 Perl/Python/PHP MySQL Apache Linux The LAMP stack. Time to Serve Request Number of Clients Performance vs. scalability. network in network out RAM CPU Storage These are the basic laws of physics. All bottlenecks are caused by one of these four resources. Disk-bound •To o l s •iostat •vmstat Determine if you are disk-bound by measuring throughput. vmstat (BSD) procs memory page disk faults cpu r b w avm fre flt re pi po fr sr tw0 in sy cs us sy id 0 2 0 799M 842M 27 0 0 0 12 0 23 344 2906 1549 1 1 98 3 3 0 869M 789M 5045 0 0 0 406 0 10 1311 17200 5301 12 4 84 3 5 0 923M 794M 5219 0 0 0 5178 0 27 1825 21496 6903 35 8 57 1 2 0 931M 784M 909 0 0 0 146 0 12 955 9157 3570 8 4 88 blocked plenty of RAM, idle processes no swapping CPUs A disk-bound FreeBSD machine. b = blocked for resources fr = pages freed/sec cs = context switches avm = active virtual pages in = interrupts flt = memory page faults sy = system calls per interval vmstat (RHEL5) # vmstat -S M 5 25 procs ---------memory-------- --swap- ---io--- --system- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 1301 194 5531 0 0 0 29 1454 2256 24 20 56 0 0 3 0 0 1257 194 5531 0 0 0 40 2087 2336 34 27 39 0 0 2 0 0 1183 194 5531 0 0 0 53 1658 2763 33 28 39 0 0 0 0 0 1344 194 5531 0 0 0 34 1807 2125 29 19 52 0 0 no blocked busy but not processes overloaded CPU in = interrupts/sec cs = context switches/sec wa = time waiting for I/O Solving disk bottlenecks • Separate spindles (logs and databases) • Get rid of atime updates! • Minimize writes • Move temp writes to /dev/shm Overview of what weʼre about to dive into. -
The Extent of Indigenous-Norse Contact and Trade Prior to Columbus Donald E
Oglethorpe Journal of Undergraduate Research Volume 6 | Issue 1 Article 3 August 2016 The Extent of Indigenous-Norse Contact and Trade Prior to Columbus Donald E. Warden Oglethorpe University, [email protected] Follow this and additional works at: https://digitalcommons.kennesaw.edu/ojur Part of the Canadian History Commons, European History Commons, Indigenous Studies Commons, Medieval History Commons, Medieval Studies Commons, and the Scandinavian Studies Commons Recommended Citation Warden, Donald E. (2016) "The Extent of Indigenous-Norse Contact and Trade Prior to Columbus," Oglethorpe Journal of Undergraduate Research: Vol. 6 : Iss. 1 , Article 3. Available at: https://digitalcommons.kennesaw.edu/ojur/vol6/iss1/3 This Article is brought to you for free and open access by DigitalCommons@Kennesaw State University. It has been accepted for inclusion in Oglethorpe Journal of Undergraduate Research by an authorized editor of DigitalCommons@Kennesaw State University. For more information, please contact [email protected]. The Extent of Indigenous-Norse Contact and Trade Prior to Columbus Cover Page Footnote I would like to thank my honors thesis committee: Dr. Michael Rulison, Dr. Kathleen Peters, and Dr. Nicholas Maher. I would also like to thank my friends and family who have supported me during my time at Oglethorpe. Moreover, I would like to thank my academic advisor, Dr. Karen Schmeichel, and the Director of the Honors Program, Dr. Sarah Terry. I could not have done any of this without you all. This article is available in Oglethorpe Journal of Undergraduate Research: https://digitalcommons.kennesaw.edu/ojur/vol6/iss1/3 Warden: Indigenous-Norse Contact and Trade Part I: Piecing Together the Puzzle Recent discoveries utilizing satellite technology from Sarah Parcak; archaeological sites from the 1960s, ancient, fantastical Sagas, and centuries of scholars thereafter each paint a picture of Norse-Indigenous contact and relations in North America prior to the Columbian Exchange. -
Pingdirectory Administration Guide Version
Release 7.3.0.3 Server Administration Guide PingDirectory | Contents | ii Contents PingDirectory™ Product Documentation................................................ 20 Overview of the Server............................................................................. 20 Server Features.................................................................................................................................20 Administration Framework.................................................................................................................21 Server Tools Location....................................................................................................................... 22 Preparing Your Environment....................................................................22 Before You Begin.............................................................................................................................. 22 System requirements..............................................................................................................22 Installing Java......................................................................................................................... 23 Preparing the Operating System (Linux).......................................................................................... 24 Configuring the File Descriptor Limits.................................................................................... 24 File System Tuning.................................................................................................................25 -
Linux Performance Tools
Linux Performance Tools Brendan Gregg Senior Performance Architect Performance Engineering Team [email protected] @brendangregg This Tutorial • A tour of many Linux performance tools – To show you what can be done – With guidance for how to do it • This includes objectives, discussion, live demos – See the video of this tutorial Observability Benchmarking Tuning Stac Tuning • Massive AWS EC2 Linux cloud – 10s of thousands of cloud instances • FreeBSD for content delivery – ~33% of US Internet traffic at night • Over 50M subscribers – Recently launched in ANZ • Use Linux server tools as needed – After cloud monitoring (Atlas, etc.) and instance monitoring (Vector) tools Agenda • Methodologies • Tools • Tool Types: – Observability – Benchmarking – Tuning – Static • Profiling • Tracing Methodologies Methodologies • Objectives: – Recognize the Streetlight Anti-Method – Perform the Workload Characterization Method – Perform the USE Method – Learn how to start with the questions, before using tools – Be aware of other methodologies My system is slow… DEMO & DISCUSSION Methodologies • There are dozens of performance tools for Linux – Packages: sysstat, procps, coreutils, … – Commercial products • Methodologies can provide guidance for choosing and using tools effectively • A starting point, a process, and an ending point An#-Methodologies • The lack of a deliberate methodology… Street Light An<-Method 1. Pick observability tools that are: – Familiar – Found on the Internet – Found at random 2. Run tools 3. Look for obvious issues Drunk Man An<-Method • Tune things at random until the problem goes away Blame Someone Else An<-Method 1. Find a system or environment component you are not responsible for 2. Hypothesize that the issue is with that component 3. Redirect the issue to the responsible team 4. -
Java Bytecode Manipulation Framework
Notice About this document The following copyright statements and licenses apply to software components that are distributed with various versions of the OnCommand Performance Manager products. Your product does not necessarily use all the software components referred to below. Where required, source code is published at the following location: ftp://ftp.netapp.com/frm-ntap/opensource/ 215-09632 _A0_ur001 -Copyright 2014 NetApp, Inc. All rights reserved. 1 Notice Copyrights and licenses The following component is subject to the ANTLR License • ANTLR, ANother Tool for Language Recognition - 2.7.6 © Copyright ANTLR / Terence Parr 2009 ANTLR License SOFTWARE RIGHTS ANTLR 1989-2004 Developed by Terence Parr Partially supported by University of San Francisco & jGuru.com We reserve no legal rights to the ANTLR--it is fully in the public domain. An individual or company may do whatever they wish with source code distributed with ANTLR or the code generated by ANTLR, including the incorporation of ANTLR, or its output, into commerical software. We encourage users to develop software with ANTLR. However, we do ask that credit is given to us for developing ANTLR. By "credit", we mean that if you use ANTLR or incorporate any source code into one of your programs (commercial product, research project, or otherwise) that you acknowledge this fact somewhere in the documentation, research report, etc... If you like ANTLR and have developed a nice tool with the output, please mention that you developed it using ANTLR. In addition, we ask that the headers remain intact in our source code. As long as these guidelines are kept, we expect to continue enhancing this system and expect to make other tools available as they are completed. -
UNIX OS Agent User's Guide
IBM Tivoli Monitoring Version 6.3.0 UNIX OS Agent User's Guide SC22-5452-00 IBM Tivoli Monitoring Version 6.3.0 UNIX OS Agent User's Guide SC22-5452-00 Note Before using this information and the product it supports, read the information in “Notices” on page 399. This edition applies to version 6, release 3 of IBM Tivoli Monitoring (product number 5724-C04) and to all subsequent releases and modifications until otherwise indicated in new editions. © Copyright IBM Corporation 1994, 2013. US Government Users Restricted Rights – Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp. Contents Tables ...............vii Solaris System CPU Workload workspace ....28 Solaris Zone Processes workspace .......28 Chapter 1. Using the monitoring agent . 1 Solaris Zones workspace ..........28 System Details workspace .........28 New in this release ............2 System Information workspace ........29 Components of the monitoring agent ......3 Top CPU-Memory %-VSize Details workspace . 30 User interface options ...........4 UNIX OS workspace ...........30 UNIX Detail workspace ..........31 Chapter 2. Requirements for the Users workspace ............31 monitoring agent ...........5 Enabling the Monitoring Agent for UNIX OS to run Chapter 4. Attributes .........33 as a nonroot user .............7 Agent Availability Management Status attributes . 36 Securing your IBM Tivoli Monitoring installation 7 Agent Active Runtime Status attributes .....37 Setting overall file ownership and permissions for AIX AMS attributes............38 -
3P OHIO. Beyond the Dreamers, and the Approach to the Infernal Regions
beyond the dreamers, and the approach Iona or the Irish were not, perhaps, the Sfcakcspcaro at Sohpol.' of London, has recently proposed a what chance there would be in the to the infernal regions was neiir at hand. first tishers or oven forgotten colonists plan for the abolition of tho liver. It is citv for .him. The country seems small Froni various sources, contemporary & well-known principle of the develop to him; the city large. He feels the 3P The polar ico* snow and darkness were at that strange island. According to nndyquasi-oontemporary, we may form naturally supposed to be pretty near Tacitus an expedition sent by Agricola ment, theory that an organ or limb gqsjsip that-flutters ,about his ears to-be a/trustworthy -general estimate of which is notused-grMual&disappears. disgusting and degrading; and chafes the point where extremes meet. Turn conquered the inhabitants of the Ork Shakespeare's course of inatructioa. ing away from this awful country, the neys -And proceeded so far into the Thus; the ancestral tail of the human under ~the Bondage^ imposed -by Bis OHIO. during his school days. At that time, species disappeared affervprimeval man neighbors through .their surveillance'of Argonauts, with favoring winds, 'sailed Northern Ocean as even to see Thulo as we nave seen, boys usually^ went to into tha ocean of the west, passing (Icelandic a nlace of show and winjtry ceased tQ use it in climbuuzixaaa. ami JUxaLnrltlainm txrwcm^WlLUiaotuma Ha ror^somerea- the latesVsevenuyears or age, BJRTCTP »>M'>T» mj auuvuia -xatxm- vrnv xivsuu Pillars of Hercules (the Straits of Gib the land of the Sviones (SoandinavTans) the practice of cramping tnemvcogetn "— —1 hn tered at once upon the. -
SUSE Linux Enterprise Server 11 SP4 System Analysis and Tuning Guide System Analysis and Tuning Guide SUSE Linux Enterprise Server 11 SP4
SUSE Linux Enterprise Server 11 SP4 System Analysis and Tuning Guide System Analysis and Tuning Guide SUSE Linux Enterprise Server 11 SP4 Publication Date: September 24, 2021 SUSE LLC 1800 South Novell Place Provo, UT 84606 USA https://documentation.suse.com Copyright © 2006– 2021 SUSE LLC and contributors. All rights reserved. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or (at your option) version 1.3; with the Invariant Section being this copyright notice and license. A copy of the license version 1.2 is included in the section entitled “GNU Free Documentation License”. For SUSE trademarks, see http://www.suse.com/company/legal/ . All other third party trademarks are the property of their respective owners. A trademark symbol (®, ™ etc.) denotes a SUSE or Novell trademark; an asterisk (*) denotes a third party trademark. All information found in this book has been compiled with utmost attention to detail. However, this does not guarantee complete accuracy. Neither SUSE LLC, its aliates, the authors nor the translators shall be held liable for possible errors or the consequences thereof. Contents About This Guide xi 1 Available Documentation xii 2 Feedback xiv 3 Documentation Conventions xv I BASICS 1 1 General Notes on System Tuning 2 1.1 Be Sure What Problem to Solve 2 1.2 Rule Out Common Problems 3 1.3 Finding the Bottleneck 3 1.4 Step-by-step Tuning 4 II SYSTEM MONITORING 5 2 System Monitoring Utilities 6 2.1 Multi-Purpose Tools 6 vmstat 7