Brendan Gregg

SEPTEMBER 25, 2021

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. But I'm not completely sure.

Speed 126

Speed Java AWS Virtualization 126

The Morning Paper

JULY 4, 2019

degraded hardware, transient networking problem) or, more often, because of some change deployed by Netflix engineers that did not have the intended effect. As a follow-up to this paper you might also enjoy Nora Jones’ article on ‘ Chaos Engineering Traps.’. Defining and running experiments.

Latency 77

Latency Engineering Metrics Traffic 77

Smashing Magazine

JANUARY 21, 2021

We were designing and building things, setting up new products, refactoring the components, and publishing articles. The entire site is built with progressive enhancement in mind, meaning that you, dear reader, can read every Smashing article in its entirety without the need to boot the application at all. We had to fix that.

Performance 145

Performance Cache Mobile Network 145

SQL Performance

JANUARY 22, 2020

However, strongly-typed isn't really strictly "strongly-typed" as you would expect, as this article is going to demonstrate, and performance could be impacted as a result. By their very definition, table-valued parameters are strongly-typed to a user-defined table type that must exist within the database where the call is being made.

Servers 55

Servers Azure Hardware Network 55

Dynatrace

NOVEMBER 20, 2019

The IBM Z platform is a range of mainframe hardware solutions that are quite frequently used in large computing shops. Typically, these shops run the z/OS operating system, but more recently, it’s not uncommon to see the Z hardware running special versions of Linux distributions. running on the 64-bit OS/390x platform.

Availability 32

Availability Hardware Java Tuning 32

Alex Russell

MARCH 6, 2021

Hardware Past As Performance Prologue. Regardless, the overall story for hardware progress remains grim, particularly when we recall how long device replacement cycles are: Tap for a larger version. But the hardware future is not evenly distributed, and web workloads aren't heavily parallel. Mind The Gap.

Performance 124

Performance Network Cache Metrics 124

All Things Distributed

JUNE 28, 2017

This article titled " Wartet nicht auf Perfektion – lernt aus euren Fehlern! The body and hardware still reflect HARTING's standard of perfection. Because our web services are overloaded and couldn't cope with the high traffic. appeared in German last week in the "Digitaliserung" column of Wirtschaftwoche.

Innovation 113

Innovation Website Servers Technology 113

Dynatrace

AUGUST 8, 2019

The IBM Z platform is a range of mainframe hardware solutions that are quite frequently used in large computing shops. Typically, these shops run the z/OS operating system, but more recently, it’s not uncommon to see the Z hardware running special versions of Linux distributions. running on the 64-bit OS/390x platform.

Availability 25

Availability Hardware Java Tuning 25

Smashing Magazine

MAY 20, 2020

This article will help you with exactly that. The metrics selection is outside of the scope of this article and depends highly on the project context, but I recommend that you start by reading User-centric Performance Metrics by Philip Walton. This saves clients traffic — sometimes traffic which the client is paying for.

Performance 99

Performance Metrics Best Practices Code 99

Percona

JULY 1, 2023

Understanding DBaaS DBaaS cloud services allow users to use databases without configuring physical hardware and infrastructure or installing software. If you need to enable Amazon RDS remote access, this article will help you do so. Considering a Fully Managed DBaaS Offering For Your Business?

AWS 52

AWS Database Serverless Storage 52

Smashing Magazine

JANUARY 11, 2021

CrUX generates an overview of performance distributions over time, with traffic collected from Google Chrome users. But account for the different types and usage behaviors of your customers (which Tobias Baldauf called cadence and cohorts ), along with bot traffic and seasonality effects. You can create your own on Chrome UX Dashboard.

Performance 145

Performance Cache Media Metrics 145

Brendan Gregg

SEPTEMBER 25, 2021

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI.

Speed 52

Speed Java AWS Virtualization 52

Brendan Gregg

SEPTEMBER 25, 2021

Since instances of both CentOS and Ubuntu were running in parallel, I could collect flame graphs at the same time (same time-of-day traffic mix) and compare them side by side. As a Xen guest, this profile was gathered using perf(1) and the kernel's software cpu-clock soft interrupts, not the hardware NMI. But I'm not completely sure.

Speed 40

Speed Java AWS Virtualization 40

Smashing Magazine

AUGUST 22, 2021

HTTP/3 performance features ( current article ). This has led to many articles claiming that QUIC also doesn’t use congestion control, that QUIC can instead start sending data at a much higher rate over UDP (relying on the removal of HOL blocking to deal with packet loss), that this is why QUIC is much faster than TCP. Did You Know?

Performance 106

Performance Network Latency Servers 106

SQL Server According to Bob

DECEMBER 18, 2018

Durability is a cornerstone of any database system and starting with SQL Server 2017 on Linux Cumulative Update 6 (CU6), SQL Server on Linux enables “Forced Flush” behavior as described in this article , improving durability on non-Fua optimized systems. “Be Linux may need similar utilities to control various hardware cache installations.

Servers 90

Servers Media Cache Storage 90

Smashing Magazine

APRIL 19, 2021

I’m sure we’ve all clicked on an article, started reading, and then had the text jump around as images, advertisements, and other content is loaded. This is applicable to pages that receive little to no traffic, so small sites without field data don’t need to be worried.

Google 140

Google Metrics Mobile Analytics 140

Smashing Magazine

JANUARY 6, 2020

For Mac OS, we can use Network Link Conditioner , for Windows Windows Traffic Shaper , for Linux netem , and for FreeBSD dummynet. On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing times (we’ll talk about them in detail later). Lighthouse , a performance auditing tool integrated into DevTools.

Performance 145

Performance Cache Network Metrics 145

Percona

APRIL 17, 2023

The swap issue is explained in the excellent article by Jeremy Cole at the Swap Insanity and NUMA Architecture. This allows MongoDB to scale horizontally, handling large datasets and high traffic loads. There is an issue with this, which causes the OS to swap even with memory available.

Best Practices 52

Best Practices Design Tuning Database 52

Smashing Magazine

JANUARY 7, 2019

For Mac OS, we can use Network Link Conditioner , for Windows Windows Traffic Shaper , for Linux netem , and for FreeBSD dummynet. On the other hand, we have hardware constraints on memory and CPU due to JavaScript parsing times (we’ll talk about them in detail later). Lighthouse , a performance auditing tool integrated into DevTools.

Performance 104

Performance Cache Network Metrics 104

Alex Russell

OCTOBER 22, 2017

Contended, over-subscribed cells can make “fast” networks brutally slow, transport variance can make TCP much less efficient , and the bursty nature of web traffic works against us. Previous versions of this article discussed slow-start, bdp, tcp window scaling, and the like. I suggest we should be conservative.

Performance 68

Performance Benchmarking Network Mobile 68

Brendan Gregg

SEPTEMBER 5, 2017

I wrote an ftrace toolkit, [perf-tools], and the article [Ftrace: the hidden light switch]. - **perf**: since 2009, this started as a PMC profiler but can do tracing now as well, usually in a dump-and-post-process style. It requires a subscription to read the latest articles, but if Linux is going to be a big part of your job, it's worth it.

Virtualization 76

Virtualization AWS Engineering Hardware 76

Percona

AUGUST 27, 2018

assigning to a specific CPU) is a manageable resource, represented by the concept of “virtual CPU” as a term that includes CPU cores, hyperthreads, hardware threads, and so forth. Instead of providing some improvement, it can unpredictably affect all the traffic. Currently, CPU affinity (i.e., The outcome may surprise some readers.

Tuning 44

Tuning Virtualization Testing Servers 44