Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 110

Performance Latency Cache Virtualization 110

Smashing Magazine

MARCH 25, 2021

A performance budget as a mechanism for planning a web experience and preventing performance decay might consist of the following yardsticks: Overall page weight, Total number of HTTP requests, Page-load time on a particular mobile network, First Input Delay (FID). You can check a sample page for a demo. Deliver through multiple CDNs.

Media 118

Media Performance Mobile Latency 118

Adrian Cockcroft

JANUARY 29, 2023

The mean and percentile measurements hide this structure, but the rest of this post will show how the structure can be measured and analyzed so that you can figure out a useful model of your system, understand what is driving the long tail of latencies and come up with better SLAs and measures of capacity. For this demo on an old MacBook (2.7

Lambda 98

Lambda Latency Cache C++ 98

Dotcom-Montior

NOVEMBER 24, 2021

There was a time when standing up a website or application was simple and straightforward and not the complex networks they are today. These systems can include physical servers, containers, virtual machines, or even a device, or node, that connects and communicates with the network. The recipe was straightforward. Peer-to-Peer.

Systems 74

Systems Monitoring Hardware Network 74

Brendan Gregg

JULY 4, 2021

AWS Graviton2); for memory with the arrival of DDR5 and High Bandwidth Memory (HBM) on-processor; for storage including new uses for 3D Xpoint as a 3D NAND accelerator; for networking with the rise of QUIC and eXpress Data Path (XDP); and so on. Ford, et al., “TCP

Performance 52

Performance Latency Hardware Storage 52

Dotcom-Montior

NOVEMBER 16, 2021

Since that time, the SRE role has evolved as the industry has changed and shifted from the traditional monolithic structures to large, widely distributed networks and microservices. As defined by the Google SRE initiative, the four golden signals of monitoring include the following metrics: Latency.

Monitoring 91

Monitoring Google DevOps Engineering 91

Brendan Gregg

FEBRUARY 28, 2023

My personal opinion is that I don't see a widespread need for more capacity given horizontal scaling and servers that can already exceed 1 Tbyte of DRAM; bandwidth is also helpful, but I'd be concerned about the increased latency for adding a hop to more memory. Ford, et al., “TCP

Performance 52

Performance Latency Cache Virtualization 52

Smashing Magazine

AUGUST 15, 2023

Modern Methods For Improving Drupal’s Largest Contentful Paint Core Web Vital Modern Methods For Improving Drupal’s Largest Contentful Paint Core Web Vital Mike Herchel 2023-08-15T10:00:00+00:00 2023-08-15T13:35:08+00:00 Let’s start with a fairly common example of a hero component on the homepage of Drupal’s demo installation of the Umami theme.

Media 73

Media Metrics Mobile Best Practices 73

Tasktop

JUNE 18, 2019

Tip #2 – Embrace the opportunity to network. Networking is almost always priceless. With the conference theme “Get Together, Go Faster” in mind, IT Revolution has established various ways for attendees to network, learn, and ask as many questions as possible. Tip #3 – Take advantage of onsite activities.

DevOps 74

DevOps Network Software Software 74

Smashing Magazine

JANUARY 11, 2021

Networking, HTTP/2, HTTP/3 OCSP stapling, EV/DV certificates, packaging, IPv6, QUIC, HTTP/3. If you don’t have a device at hand, emulate mobile experience on desktop by testing on a throttled 3G network (e.g. Estimated Input Latency tells us if we are hitting that threshold, and ideally, it should be below 50ms. 300ms RTT, 1.6

Performance 145

Performance Cache Media Metrics 145

Adrian Cockcroft

NOVEMBER 18, 2019

OPN304 Learnings from migrating a service from JDK 8 to JDK 11 AWS Lambda improved latency by migrating to JDK 11 with Amazon Corretto. Leigh Capili (DevAdv) demos how to launch apps from Git using Kubernetes orchestration, Ignite virtualization, and GitOps management.

Open Source 40

Open Source AWS Lambda Serverless 40

Adrian Cockcroft

NOVEMBER 18, 2019

OPN304 Learnings from migrating a service from JDK 8 to JDK 11 AWS Lambda improved latency by migrating to JDK 11 with Amazon Corretto. Leigh Capili (DevAdv) demos how to launch apps from Git using Kubernetes orchestration, Ignite virtualization, and GitOps management.

Open Source 40

Open Source AWS Lambda Serverless 40

Smashing Magazine

JANUARY 6, 2020

If you don’t have a device at hand, emulate mobile experience on desktop by testing on a throttled 3G network (e.g. To make the performance impact more visible, you could even introduce 2G Tuesdays or set up a throttled 3G/4G network in your office for faster testing. 300ms RTT, 1.6 Mbps down, 0.8

Performance 145

Performance Cache Network Metrics 145

Percona

MAY 2, 2023

example.net --port=27017 --username=user --authenticationDatabase=admin --db=demo --collection=events --out=/opt/backup/mongodump-2011-10-24 Note : If we don’t specify the DB name or Collection name explicitly in the above “mongodump” syntax then the backup will be taken for the entire database or collections, respectively.

Best Practices 52

Best Practices Database Storage Servers 52

Smashing Magazine

JANUARY 7, 2019

If you don’t have a device at hand, emulate mobile experience on desktop by testing on a throttled network (e.g. To make the performance impact more visible, you could even introduce 2G Tuesdays or set up a throttled 3G network in your office for faster testing. 150ms RTT, 1.5 Mbps down, 0.7 Mbps up) with a throttled CPU (5× slowdown).

Performance 104

Performance Cache Metrics Network 104

Brendan Gregg

SEPTEMBER 5, 2017

Here's some output from my zfsdist tool, in bcc/BPF, which measures ZFS latency as a histogram on Linux: # zfsdist. Tracing ZFS operation latency. At my employer we sometimes use SR-IOV for direct network interface access, and NVMe for direct disk access. Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

The Netflix TechBlog

FEBRUARY 20, 2019

Today we are excited to announce latency heatmaps and improved container support for our on-host monitoring solution?—?Vector?—?to Remotely view real-time process scheduler latency and tcp throughput with Vector and eBPF What is Vector? to the broader community. Vector is open source and in use by multiple companies.

Performance 211

Performance Latency Open Source Metrics 211

All Things Distributed

OCTOBER 25, 2018

The new AWS Africa (Cape Town) Region will have three Availability Zones and provide lower latency to end users across Sub-Saharan Africa. That's where we built many pioneering networking technologies, our next-generation software for customer support, and the technology behind our compute service, Amazon EC2.

AWS 167

AWS Cloud Education Programming 167

Abhishek Tiwari

NOVEMBER 3, 2018

Case-in-point, most enterprise CMS vendors lack robust full-site content delivery network (CDN) integration. A few months back, I was pulled into a scenario where a business has been working with a leading CMS vendor to roll-out a network of multi-regional websites.

Systems 63

Systems Cache Website Network 63

High Scalability

JANUARY 24, 2019

Rob Pike (1984) : A collection of impressions after doing a week’s work (rather than demo reception) at PARC. TServerless : We sat with a solution architect, apparently they are aware of the latency issue and suggested to ditch api gw and build our own solution. 10% : Netflix captured screen time in US; 8.3

Internet 29

Internet Internet Scalability Games 29