VoltDB

JUNE 19, 2017

One of the big topics at the OpenStack conference was how to prepare and implement a successful transition to 5G. Unfortunately, this means that the age-old Telco bugbears will rear their ugly heads again, including latency. 5G, as a fundamental requirement, mandates a 1 millisecond latency from the datasource to its destination.

Latency 40

Latency Retail Virtualization Hardware 40

VoltDB

JUNE 19, 2017

One of the big topics at the OpenStack conference was how to prepare and implement a successful transition to 5G. Unfortunately, this means that the age-old Telco bugbears will rear their ugly heads again, including latency. 5G, as a fundamental requirement, mandates a 1 millisecond latency from the datasource to its destination.

Latency 40

Latency Retail Virtualization Hardware 40

InfoQ

APRIL 15, 2024

At the QCon London 2024 conference, Félix GV from LinkedIn discussed the AI/ML platform powering the company’s products. He specifically delved into Venice DB, the NoSQL data store used for feature persistence. By Rafal Gancarz

Artificial Intelligence 108

Artificial Intelligence Big Data Data Engineering Latency 108

The Morning Paper

NOVEMBER 8, 2020

USENIX is a nonprofit organisation committed to making content and research freely available – both conference proceedings and the recorded presentations of their events. Without in-person conferences this year, income is down and events are under threat. For Facebook’s Delos, reconfiguration latencies of 10s of ms are ok.

Virtualization 126

Virtualization Latency Storage Systems 126

Sutter's Mill

SEPTEMBER 11, 2020

It’s hard to believe CppCon 2020 is nearly here… in fact, pre-conference tutorials are already in progress. I’ll be at the conference throughout the week in the hallways and session rooms. This is my one actual talk, and it’s the last talk of the conference. The conference starts Sunday.

C++ 77

C++ Games Latency Programming 77

Adrian Cockcroft

JANUARY 20, 2023

on Myths and Legends of High Performance Computing  — it’s a somewhat light-hearted look at some of the same issues by the leader of the team that built the Fugaku system I mention below. The emergence of chiplet technology also allows higher performance and integration without having to design every chip from scratch.

Architecture 52

Architecture Latency Benchmarking AWS 52

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 Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. How would you _time_ time?

Speed 126

Speed Java AWS Virtualization 126

ACM Sigarch

MAY 31, 2023

Heterogeneous and Composable Memory (HCM) offers a feasible solution for terabyte- or petabyte-scale systems, addressing the performance and efficiency demands of emerging big-data applications. CXL-based disaggregated memory provides a new opportunity with two orders of magnitude better performance than RDMA (as illustrated in Figure 2).

Latency 52

Latency Hardware Cache Architecture 52

Brendan Gregg

AUGUST 18, 2019

bpftrace is a new open source tracer for Linux for analyzing production performance problems and troubleshooting software. Linux already has many performance tools, but these are often counter-based and have limited visibility. Linux already has many performance tools, but these are often counter-based and have limited visibility.

Latency 68

Latency C++ Cache Programming 68

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map. runqlat CPU scheduler latency heat map. biolatency Disk I/O latency histogram heat map. runqlat CPU scheduler latency heat map. I chose these to find the most performance wins with the fewest tools. execsnoop New processes (via exec(2)) table.

Latency 145

Latency Cache Energy Systems 145

The Morning Paper

JULY 7, 2019

In addition to availability, our respondents focus most heavily on supporting the following data attributes: “accessibility, accuracy, authoritativeness, freshness, latency, structuredness, ontological typing, connectedness, and semantic joinability.” To address this, rigorous rollout processes are required.

Software Engineering 92

Software Engineering Engineering Software Software 92

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 Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. How would you time time?

Speed 52

Speed Java AWS Virtualization 52

Speed Curve

NOVEMBER 3, 2019

” Tammy, Steve and Cliff at Velocity Conference circa 2015. As a veteran in the performance industry, I’ve spent a large part of my career helping to build performance culture. Building performance culture across the organization. What am I most excited about? Building a more inclusive web.

Education 47

Education Latency Strategy Speed 47

VoltDB

JUNE 1, 2017

Earlier this month I spent a week at the OpenStack conference. But once you realize that there are, in fact, several OpenStack conferences happening at the same time and place, it makes more sense. But once you realize that there are, in fact, several OpenStack conferences happening at the same time and place, it makes more sense.

Hardware 56

Hardware Latency Virtualization Cloud 56

The Morning Paper

SEPTEMBER 5, 2019

For response times (latencies) reporting a simple metric such as ‘average’ is next to useless. Instead we want to understand what’s happening at different latency percentiles (e.g A characteristic of latency distributions is that they have a long tail. Why do we need a new sketch? range, and that it has no published guarantees.

Latency 52

Latency Metrics Open Source Java 52

The Morning Paper

DECEMBER 8, 2019

At the start of November I was privileged to attend HPTS (the High Performance Transaction Systems) conference in Asilomar. On the last morning of the conference Daniel Bittman presented some of the work being done in the context of the Twizzler OS project to explore new programming models for NVM. Early performance results.

Hardware 56

Hardware Programming Media Storage 56

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 Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. How would you _time_ time?

Speed 40

Speed Java AWS Virtualization 40

VoltDB

JUNE 1, 2017

Earlier this month I spent a week at the OpenStack conference. But once you realize that there are, in fact, several OpenStack conferences happening at the same time and place, it makes more sense. But once you realize that there are, in fact, several OpenStack conferences happening at the same time and place, it makes more sense.

Hardware 40

Hardware Latency Virtualization Cloud 40

John McCalpin

JANUARY 22, 2018

Dr. Damon McDougall gave a short presentation on this study at the IXPUG 2018 Fall Conference ( pdf ) — I originally wrote these notes to help organize my thoughts as we were preparing the IXPUG presentation, and later decided that the extra details contained here are interesting enough for me to post it.

Latency 40

Latency Hardware Code Testing 40

Brendan Gregg

MAY 16, 2017

Instead, it has been a process of continual improvements, by many engineers across the company. ## A Day in the Life (Performance Engineering) What do I actually do all day? Most of my day is a 50/50 mixture of proactive projects, and reactive performance analysis. A latency outlier issue that happened every 15 minutes.

Java 75

Java Entertainment Engineering Scalability 75

The Morning Paper

JANUARY 23, 2020

1:00pm Eastern Standard Time the Personalisation / Homepage Team for Etsy are in a conference room kicking off a lunch-and-learn session on the personalised feed feature on the Etsy.com homepage. 1:18pm a key observation was made that an API call to populate the homepage sidebar saw a huge jump in latency.

Internet 53

Internet Internet Cache Engineering 53

Speed Curve

SEPTEMBER 4, 2013

It's an overview of why front-end performance matter, how to monitor it and the challenges faced when building for an increasingly mobile world. Bandwidth, latency and it's fundamental impact on the speed of the web. Bandwidth, latency and it's fundamental impact on the speed of the web. Performance Tools. References.

Speed 40

Speed Benchmarking Latency Mobile 40

Tim Kadlec

AUGUST 14, 2018

The area he was in was served by satellite internet access, and experienced significant latency (a floor of 506 milliseconds) and packet loss (between 50-80% was typical). I can personally remember bringing this up to folks involved with Chrome at conferences, online AMA’s and basically whenever else I had the opportunity.

Cache 64

Cache Mobile Servers Latency 64

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map 5. runqlat CPU scheduler latency heat map 10. biolatency Disk I/O latency histogram heat map 5. runqlat CPU scheduler latency heat map 10. I chose these to find the most performance wins with the fewest tools. execsnoop New processes (via exec(2)) table 2.

Open Source 40

Open Source Latency Cache Energy 40

John McCalpin

OCTOBER 16, 2016

“Memory Bandwidth and System Balance in HPC Systems” If you are planning to attend the SuperComputing 2016 conference in Salt Lake City next month, be sure to reserve a spot on your calendar for my talk on Wednesday afternoon (4:15pm-5:00pm).

Architecture 40

Architecture Systems Technology Technology 40

Adrian Cockcroft

NOVEMBER 11, 2019

It would take 5–10 minutes after the problem occurred to appear as a problem, then people have to notice and respond to emails or pager text messages, dial into a conference call, and log in to monitoring dashboards before any human response can start. Try to measure your mean time to respond (MTTR) for incidents.

Latency 52

Latency Engineering Systems Hardware 52

Adrian Cockcroft

NOVEMBER 11, 2019

It would take 5–10 minutes after the problem occurred to appear as a problem, then people have to notice and respond to emails or pager text messages, dial into a conference call, and log in to monitoring dashboards before any human response can start. Try to measure your mean time to respond (MTTR) for incidents.

Latency 53

Latency Engineering Systems Hardware 53

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. As a performance engineer who does kernel tracing, I find the lack of an ID I can trace in the kernel to be pretty annoying. Hit Ctrl-C to end. ^C People rarely create them manually.

Virtualization 76

Virtualization AWS Engineering Hardware 76

The Netflix TechBlog

NOVEMBER 3, 2022

In that scenario, the system would need to deal with the data propagation latency directly, for example, by use of timeouts or client-originated update tracking mechanisms. We started seeing increased response latencies and leader servers running at dangerously high utilization. The query rate in this test is set to 1K requests/second.

Cache 224

Cache Latency Traffic Systems 224

Smashing Magazine

AUGUST 22, 2021

HTTP/3: Performance Improvements (Part 2). HTTP/3: Performance Improvements (Part 2). In this second part, we will zoom in on the performance improvements that QUIC and HTTP/3 bring to the table for web-page loading. HTTP/3 performance features ( current article ). Two-way latency is often called round-trip time (RTT).

Performance 106

Performance Network Latency Servers 106

The Netflix TechBlog

FEBRUARY 9, 2021

By offloading token processing from these systems to the central Edge Authentication Services, downstream systems saw significant gains in CPU, request latency, and garbage collection metrics, all of which help reduce cluster footprint and cloud costs. Some of the performance improvement is due to consolidation of this?—?MSL

Architecture 221

Architecture Latency Servers Website 221

All Things Distributed

OCTOBER 2, 2017

We were pushing the limits of what was a leading commercial database at the time and were unable to sustain the availability, scalability and performance needs that our growing Amazon business demanded. Performant – The service would need to be able to maintain consistent performance in the face of diverse customer workloads.

Internet 128

Internet Internet AWS Performance 128

Smashing Magazine

AUGUST 9, 2021

You may have read some blog posts or heard conference talks on this topic and think you know the answers. Often they make it seem as if HTTP/3 is a revolution in performance, while it is really a more modest (yet still useful!) HTTP/3 performance features ( coming up soon! ). Robin Marx. 2021-08-09T11:00:00+00:00.

Transportation 145

Transportation Internet Internet Network 145

The Netflix TechBlog

DECEMBER 16, 2020

Martin Tingley In November, Netflix was a proud sponsor of the 2020 Conference on Digital Experimentation (CODE), hosted by the MIT Initiative on the Digital Economy. Simon Ejdemyr presented a talk describing how Netflix is exploring Low-latency multivariate Bayesian shrinkage in online experiments.

Code 156

Code Latency Metrics Technology 156