MySQL Memory Management, Memory Allocators, and Operating System


performance mysql memory operating system bug memory management memory allocatorsWhen users experience memory usage issues with any software, including MySQL, their first response is to think that it’s a symptom of a memory leak. As this story will show, this is not always the case. This story is about a bug.

Ginseng: keeping secrets in registers when you distrust the operating system

The Morning Paper

Ginseng: keeping secrets in registers when you distrust the operating system Yun & Zhong et al., In doing so, the app assumes that the operating system (OS) is trustworthy.

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Back-to-Basics Weekend Reading - Virtualizing Operating Systems.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. Back-to-Basics Weekend Reading - Virtualizing Operating Systems. This weekends back-to-basics reading is on operating system virtualization. There are two papers that deserve the "classic" tag as they both form the basis for operating system virtualization that is in production today. All Things Distributed.

A persistent problem: managing pointers in NVM

The Morning Paper

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. This means that the overheads of system calls become much more noticeable. " Uncategorized Hardware Operating Systems

Software-defined far memory in warehouse scale computers

The Morning Paper

” This paper describes a “far memory” system that has been in production deployment at Google since 2016. With a far memory tier in place operators can choose between packing more jobs onto each machine, or reducing the DRAM capacity, both of which lead to TCO reductions.

Compress objects, not cache lines: an object-based compressed memory hierarchy

The Morning Paper

Uncategorized Hardware Operating SystemsCompress objects, not cache lines: an object-based compressed memory hierarchy Tsai & Sanchez, ASPLOS’19. Last time out we saw how Google have been able to save millions of dollars though memory compression enabled via zswap.

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A case for lease-based, utilitarian resource management on mobile devices

The Morning Paper

LeaseOS borrows the concept of a lease from distributed systems, but with a rather nice twist, and is able to reduce power wastage by 92% with no disruption to application experience and no changes required to the apps themselves. Uncategorized mobile Operating Systems

A tale of two abstractions: the case for object space

The Morning Paper

The global object space contains all objects (potentially across multiple systems), allowing persistent pointers to refer to data with long lifetimes and giving software the ability to operate directly on persistent structures. Uncategorized Operating Systems

Time protection: the missing OS abstraction

The Morning Paper

Just as today’s systems offer memory protection, they call this time protection. The paper focuses on two key use cases: A confined component running in its own security domain, connected to the rest of the system by explicit (e.g. Uncategorized Operating Systems Security

Back-to-Basics Weekend Reading - Using continuations to.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. Back-to-Basics Weekend Reading - Using continuations to implement thread management and communication in operating systems. All Things Distributed.

AWS Elastic Beanstalk: A Quick and Simple Way into the Cloud - All.

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. Flexibility is one of the key principles of Amazon Web Services - developers can select any programming language and software package, any operating system, any middleware and any database to build systems and applications that meet their requirements. All Things Distributed. AWS Elastic Beanstalk: A Quick and Simple Way into the Cloud. By Werner Vogels on 18 January 2011 04:00 PM. Permalink.

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Desired Capabilities in Selenium Testing With Examples


Desired Capabilities is a class used to declare a set of basic requirements such as combinations of browsers, operating systems, browser versions, etc. Get the right outcomes from Selenium testing. You may also like: Discover the Top Tips and Tricks of the Selenium WebDriver.

Using Telegraf on Windows


Telegraf is an agent that runs on your operating system of choice, schedules gathering metrics and events from various sources and then sends them to one or more sinks, such as InfluxDB or Kafka. Learn how to use Telegraf on Windows.

OneAgent release notes, version 1.183


Current Operating systems support changes. The following operating systems will no longer be supported starting 01 March 2020. Dynatrace news.Net. Added support for Azure Functions 2.x. Node.js. Added support for Node.js 13 for Linux, Alpine Linux 64-bit (PPCLE). Added support for Node.js 13 for Linux, Alpine Linux 64-bit (x86), Windows (x86). Added support for MongoDB PHP for Windows 1.3+. Added support for Memcached 3.0.0+. Added support for Redis 4.0.0+.

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GLibC DNS Exploit in Unix/Linux Machines


A DNS related exploit of Unix and Linux based operating systems has been gaining attention lately. The vulnerability exploits a bug in the GNU C library commonly referred to as the GLibC, serves as the core C library for many flavors of Linux and Unix based operating systems.

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3 frameworks that make UI testing more resilient

TechBeacon Testing

One of the biggest problems with test automation on any platform or operating system is synchronizing test automation interactions with the user interface (UI).

OneAgent release notes version 1.181


Operating systems. Upcoming Operating systems support changes. The following operating systems will no longer be supported starting 2020/03/01. The following operating systems will no longer be supported starting 2020/05/01. The following operating systems will no longer be supported starting 2020/07/01. The following operating systems will no longer be supported starting 2020/07/01. OneAgent Operator version 0.5

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Fully automatic code level monitoring and extended version support for AIX


In April of this year, we released a long-awaited GA version of the full-stack OneAgent for the IBM AIX operating system. AIX is considered to be one of the core operating systems used by our largest customers. Dynatrace news.

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Back-to-Basics Weekend Reading - The Working Set Model for Program Behavior

All Things Distributed

This weekend we go back in time all the way to the beginning of operating systems research. In the first SOSP conference in 1967 there were several papers that laid the foundation for the development of structured operating systems.

5 Benefits of Parallel Testing


Parallel testing can be used when the app is to be tested on a different version of the operating system or when there is a new version of the app to be launched. These days software firms are putting in a lot of effort to attain quality at speed.

BPF: A New Type of Software

Brendan Gregg

BPF is the biggest operating systems change I've seen in my career, and it's thrilling to be a part of it. At Netflix we have 15 BPF programs running on cloud servers by default; Facebook has 40.

Routing Instana Events to Humio


It’s not just your code that writes out log messages, every other piece of software does, from the operating system all the way up the stack. Logging is a natural part of coding. Believe it or not, we’ve all programmed logging into our code.

Predictive CPU isolation of containers at Netflix

The Netflix TechBlog

Traditionally it has been the responsibility of the operating system’s task scheduler to mitigate this performance isolation problem. In this way a user-space process defines a “fence” within which CFS operates for each container.

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Cross Browser Testing: Manual vs Automated Browser Testing


Today, considering the wide range of browsers, devices and operating systems available, cross browser testing plays a crucial role in the software development industry. It allows us to test a web application in any browser and across any operating system.

HTTP synthetic monitoring now available for Windows-based ActiveGates


So, those of you limited to Windows-only systems can now also enjoy all the goodness of having HTTP monitors deliver API testing right to your door! So, if you want to assign new ActiveGates to a location, they don’t have to be based on the same operating system.

Which Is the Best PostgreSQL GUI? 2019 Comparison


PostgreSQL is the fourth most popular database management system in the world, and heavily used in all sizes of applications from small to large. Easier access to files, features, and the operating system. Metadata search among rows in database system tables.

Are Computer Architects to Blame for the State of Security Today?

ACM Sigarch

This article examines the history of architectural support, summarizes research philosophies, and delves into possible reasons for relatively little support for software security in current systems. Attestation—Providing systems the means to attest or verify the integrity of their components.

Taskbar Latency and Kernel Calls

Randon ASCII

I work quickly on my computer and I get frustrated when I am forced to wait on an operation that should be fast. Remember that these are calls to the operating system – kernel calls.

Google Analytics and Dynatrace – Why you need both


If I see tolerating and frustrated visitors, is it related to a region, country, device, or an operating system? Dynatrace news.

Average Page Load Times for 2020 – Are you faster?


There are many resources you can use for this, and it may even be best to use a combination of them: WebPageTest : The industry standard for measuring site performance – results are collected from real browsers running common operating systems.

General availability of OneAgent full-stack monitoring for AIX


We’re proud to announce the general availability of OneAgent full-stack monitoring for the AIX operating system. When we examine IBM Power Systems usage by industry, the majority of Fortune 500 companies run their most demanding mission-critical workloads on AIX.

Regression Testing vs Retesting-Differences and Examples


The testing phase starts with unit testing followed by integration testing, system testing, system integration testing, acceptance testing, and regression testing. System testing- checks end to end flows works as expected.

End of term

The Morning Paper

The role of the operating system in a kernel-bypass era. I can’t believe we’ve arrived at the end-of-term again already! I’ll be taking a four-week break from writing The Morning Paper, normal service resumes on Monday 19th August. A big milestone will slip quietly by during this recess – it was five years ago on the 30th July 2014 that I read and shared the very first paper in this current streak of paper reading.

PREVIEW : SentryOne Plan Explorer Extension for Azure Data Studio

SQL Performance

And recommended system configuration: Two or more cores 8GB or more of memory Operating Systems: Windows (8.1 / Server 2012 R2 or better) macOS (10.13 To see the condensed tooltip for an operator, hover over the operator.

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Dev, Ops, and Determinism

J. Paul Reed

Challenging this idea, and suggesting that in complex systems, this linearity is soothingly deceptive?—?but Operations engineers, on the other hand, tend to nod and engage with the idea that linear narratives of the complex world may be deceptive.

Open Source at AWS re:Invent

Adrian Cockcroft

AWS Developer Relations on how the shift from Robot Operating System (ROS) 1 to ROS 2 will change the landscape for all robot lovers. OPN220 Build robotic cloud simulations with ROS and AWS RoboMaker Join Camilo Buscaron, AWS Principal Open Source Technologist, and Katherine Scott, Developer Advocate, Open Robotics in this workshop to use Gazebo, a 3D simulator, and Robot Operating System (ROS) on AWS RoboMaker and learn how to spin up robotic simulations.

Successful Kubernetes Monitoring – Three Pitfalls to Avoid


The concept of Observability isn’t new to monitoring; in a nutshell, it is the state or ability for a system to send information that can be collected and interpreted to understand its overall health or performance. Dynatrace news.



A wide range of users with different operating systems, browsers, hardware configurations and other variables provides a wide sample size that helps developers discover as many issues as possible.

Partner Spotlight: Simplify microservices complexity with Red Hat & Dynatrace


So, he started selling open source Linux and Unix operating systems with his famous sales pitch “You wouldn’t buy a car with the hood welded shut”. Soon thereafter, in 1995, they became one company under the name “Red Hat” and started operating out of Raleigh, North Carolina.

Local-first software: you own your data, in spite of the cloud

The Morning Paper

On the other hand we have good old-fashioned native apps that you install on your operating system (a dying breed? With a traditional OS app 2 you have much more control over the data (the files on your file system at least, which if you’re lucky might even be in an open format).

The Back-to-Basics Readings of 2012 - All Things Distributed

All Things Distributed

Werner Vogels weblog on building scalable and robust distributed systems. I am pretty sure some if not all of these papers deserved to be elected to the hall of fame of best papers in distributed systems. Feb 11 - A Survey of Rollback-Recovery Protocols in Message-Passing Systems , E.

Monitor web applications from within your corporate network


Q: Is there a plan to support more operating systems? Support for newer versions of these systems will be introduced as well. Dynatrace news. We’re happy to announce the launch of Dynatrace Synthetic private browser monitors!

Everything as Code


Everything as Code can be described as a methodology or practice which consists of extending the idea of how applications are treated as code and applying these concepts to all other IT components like operating systems, network configurations, and pipelines. Dynatrace news.

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