Brendan Gregg

SEPTEMBER 25, 2021

These strange questions came to the fore back in 2014 when Netflix was switching services from CentOS Linux to Ubuntu, and I helped debug several weird performance issues including one I'll describe here. A quick check of basic performance statistics showed over 30% higher CPU consumption. How long does it take to read the time?

Speed 40

Speed Java AWS Virtualization 40

Alex Russell

MARCH 6, 2021

Back in 2016, I gave a talk outlining the causes and effects of the terrible performance of web apps built using popular tools on the fastest-growing device segment: low-end to mid-range Android phones. Poor performance has a compound effect on user expectations at an ecosystem level. Live by the link, die by the link.

Performance 124

Performance Network Cache Metrics 124

SQL Performance

JUNE 21, 2019

I've been teaching and writing about common SQL Server mistakes for many years. This article will expand on my previous article and point out how these apply to SQL Server , Azure SQL Database , and Azure SQL Managed Instance. SQL Server Agent alerts. This situation applies to on-premises SQL Server and IaaS. Statistics.

Servers 49

Servers Azure Hardware Database 49

SQL Performance

JULY 16, 2019

A close monitoring of the hardware enthusiast community, including many of the most respected hardware analysts and reviewers paints an even more dire picture about Intel in the server processor space. Despite all of this, Intel is not going to lose their entire server processor business any time soon. So, what has changed my mind?

Servers 46

Servers Hardware Architecture Retail 46

MachMetrics

JUNE 16, 2020

Many were hesitant to sacrifice site speed for the added layer of security if they felt like they didn’t need it. Secondly, SSL/HTTPS unlocks additional web performance benefits that more than make up for the added latency. How HTTPS Improves Performance. The server can also preemptively send resources, reducing delays.

Speed 86

Speed Latency Google Website 86

The Netflix TechBlog

APRIL 17, 2019

Netflix headquarters circa 2014. Scalable Video Technology (SVT) is Intel’s open source framework that provides high-performance software video encoding libraries for developers of visual cloud technologies. The encoder can typically be improved years after the standard has been frozen including varying speed and quality trade-offs.

Open Source 166

Open Source Scalability Speed Efficiency 166

SQL Server According to Bob

SEPTEMBER 26, 2016

When we released Always On Availability Groups in SQL Server 2012 as a new and powerful way to achieve high availability, hardware environments included NUMA machines with low-end multi-core processors and SATA and SAN drives for storage (some SSDs). As we moved towards SQL Server 2014, the pace of hardware accelerated.

Availability 40

Availability Servers Hardware Benchmarking 40

Rigor

SEPTEMBER 11, 2019

Reading time 16 min Whether you’re a web performance expert, an evangelist for the culture of performance, a web engineer incorporating performance into your process, or someone new to the web performance entirely, you probably identify as curious, excited about new ideas, and always learning. Rachel Andrew.

Performance 89

Performance Education Google Website 89

SQL Performance

MARCH 17, 2020

Back in 2014, I wrote an article called Performance Tuning the Whole Query Plan. This follow-up post revisits the question for SQL Server 2019, using a larger number of rows. This machine has four i7 CPUs (hyperthreaded to 8) with a base speed of 2.4GHz. Performance is competitive at around 15ms.

Servers 86

Servers Tuning Database Efficiency 86

SQL Performance

APRIL 8, 2019

These AMD EPYC processors have a number of advantages for SQL Server workloads, as I will explain in this article. This 14nm first-generation AMD EPYC 7551 processor has 32 cores and 64 threads, and it works in one or two-socket servers. This makes it a good choice for many SQL Server workloads, especially DW workloads.

Azure 42

Azure Virtualization Storage Benchmarking 42

Brendan Gregg

NOVEMBER 29, 2017

Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. I'd expect between 0.1%

Virtualization 111

Virtualization AWS Hardware Storage 111

Enprowess

JANUARY 11, 2022

These front end frameworks provide various templates to interact with browser components and are compatible with various libraries which boost the performance while reducing the amount of code required. Thus, the entire website development methodology benefits from the boosted speed and saves times by using these top front end frameworks.

Virtualization 64

Virtualization Website Speed Mobile 64

SQL Performance

MARCH 8, 2021

SQL Server 2014 SP2 and later produce runtime (“actual”) execution plans that can include elapsed time and CPU usage for each execution plan operator (see KB3170113 and this blog post by Pedro Lopes). SQL Server makes some timing adjustments in parallel plans to promote consistency, but they are not perfectly implemented.

Servers 95

Servers Tuning Architecture Performance 95

KeyCDN

JUNE 20, 2019

The lower conversion rate on mobile could be due to a variety of reasons including the website not being responsive for mobile devices, the speed isn’t up to par, etc. Having high-quality images on your site can however slow down the performance of your site overall as the image size grows.

Ecommerce 41

Ecommerce Speed Website Mobile 41

Enprowess

SEPTEMBER 28, 2021

Performance. Finding the simplest react alternatives isn’t as straightforward as many assume because it’s exhausting to search out an ideal match whilst considering the stability and ecosystem support together with API performance delivered by ReactJS. You will get add-ons like server-side rendering, routing and more.

Open Source 52

Open Source Mobile Entertainment Virtualization 52

Brendan Gregg

NOVEMBER 28, 2017

Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. I'd expect between 0.1%

Virtualization 40

Virtualization AWS Hardware Storage 40

Abhishek Tiwari

NOVEMBER 3, 2018

If you put your whole website on CDN, technically you don’t need a large number of server infrastructure and CMS licenses. They often get blindsided by vendor’s pitch and end-up making decision based on some fancy demos (see my post from 2014 on Adobe AEM ). Circa 2014, I was working with a big Japanese automotive brand in Australia.

Systems 63

Systems Cache Website Network 63

Enprowess

SEPTEMBER 20, 2021

However, choice mainly depends on numerous factors like project timeline, framework performance, learning curve, and team size. Performance. Created by Evan You, Vue had its first public appearance in 2014. Vue vs React: Performance. Two primary metrics verify the speed of an app: start-up time and runtime performance.

Open Source 52

Open Source Mobile Scalability Google 52

Brendan Gregg

SEPTEMBER 5, 2017

I gave a talk about container performance recently at DockerCon, and included a quick summary of how they work: YouTube , SlideShare : If you search of slideshare and youtube, you'll find many other good talks on containers as well. Oracle VM Server is based on Xen. People rarely create them manually.

Virtualization 76

Virtualization AWS Engineering Hardware 76

Brendan Gregg

AUGUST 8, 2017

If they are higher than your CPU count, then you might have a performance problem (it depends). And here's an excerpt from [Linux] today (include/linux/sched/loadavg.h): #define EXP_1 1884 /* 1/exp(5sec/1min) as fixed-point */ #define EXP_5 2014 /* 1/exp(5sec/5min) */ #define EXP_15 2037 /* 1/exp(5sec/15min) */.

Latency 111

Latency Metrics C++ Systems 111

SQL Server According to Bob

DECEMBER 31, 2018

How It Works: XEvent Output and Visualization SQL Server Management Studio Provides–“XE Profiler” Use the SSMS XEvent Profiler. Using SQL Server Management Studio (SSMS) and storing the events in a table requires reading the events, streaming to table storage followed by an order by event sequence query. The XEProfiler Sample.

Efficiency 40

Efficiency Code Servers Cache 40