ACM Sigarch

MARCH 18, 2019

With two blog posts, we argue for more use of simple models beyond Amdahl’s Law. To this end, we present three simple models that we find useful like Amdahl’s Law, split here into two blog posts. How many buffers are needed to track pending requests as a function of needed bandwidth and expected latency? Answered in Part 2.).

Systems 60

Systems Latency Performance Analytics 60

MachMetrics

JUNE 16, 2020

In a vacuum, an SSL certificate does add some additional latency, as it requires 2 extra round trips to establish a secure connection before sending any data to the browser. Secondly, SSL/HTTPS unlocks additional web performance benefits that more than make up for the added latency. Source: Google Blog.

Speed 86

Speed Latency Google Website 86

ACM Sigarch

MARCH 25, 2019

With two blog posts, we argue for more use of simple models beyond Amdahl’s Law. Previously, Part 1 of these two blog posts provided our thesis that analytic models can complement measurement and simulations to give quick insight, show what is not possible, provide a double-check, and suggest future directions. and 1/S as ?.

Systems 53

Systems Latency Performance C++ 53

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

Brendan Gregg

MAY 16, 2017

As before, no one at Netflix has asked me to write this, and this is my personal blog and not a company post. When I joined Netflix in April 2014, we had over 40 million subscribers in 41 countries. A latency outlier issue that happened every 15 minutes. eBPF]: /blog/2016-10-27/dtrace-for-linux-2016.html

Java 75

Java Entertainment Engineering Scalability 75

Brendan Gregg

AUGUST 29, 2021

biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. cachestat]: /blog/2014-12-31/linux-page-cache-hit-ratio.html [60-second performance checklist]: Articles/Netflix_Linux_Perf_Analysis_60s.pdf [bcc]: [link] An r_wait of 33 ms is kinda high, and likely due to the queueing (avgqu-sz).

Cache 105

Cache C++ AWS Latency 105

The Morning Paper

JANUARY 23, 2020

Today we’ll be digging into the analysis of an incident that took place at Etsy on December 4th, 2014. 1:18pm a key observation was made that an API call to populate the homepage sidebar saw a huge jump in latency. The blog post was subsequently unpublished. The shop had been closed so no data was available.

Internet 53

Internet Internet Cache Engineering 53

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map 5. runqlat CPU scheduler latency heat map 10. We'll likely open source the new one at some point and have a post about it on the Netflix tech blog. ## Case study: Facebook Facebook are advanced users of BPF, but deep details of how they run the tools fleet-wide aren't fully public.

Open Source 40

Open Source Latency Cache Energy 40

SQL Server According to Bob

SEPTEMBER 26, 2016

As we moved towards SQL Server 2014, the pace of hardware accelerated. Our customers who deployed Availability Groups were now using servers for primary and secondary replicas with 12+ core sockets and flash storage SSD arrays providing microsecond to low millisecond latencies. See more in this blog post.

Availability 40

Availability Servers Hardware Benchmarking 40

The Netflix TechBlog

JANUARY 10, 2024

This introductory blog focuses on an overview of our journey. Future blogs will provide deeper dives into each service, sharing insights and lessons learned from this process. This architecture shift greatly reduced the processing latency and increased system resiliency. divide the input video into small chunks 2.

Processing 229

Processing Media Latency Innovation 229

Brendan Gregg

AUGUST 29, 2021

biolatency From [bcc], this eBPF tool shows a latency histogram of disk I/O. cachestat]: /blog/2014-12-31/linux-page-cache-hit-ratio.html [60-second performance checklist]: /Articles/Netflix_Linux_Perf_Analysis_60s.pdf [bcc]: [link] An r_wait of 33 ms is kinda high, and likely due to the queueing (avgqu-sz).

Cache 40

Cache C++ AWS Systems 40

Alex Russell

APRIL 29, 2021

Delayed three years ( Chrome 40, November 2014 vs. Safari 11.1, A subset ( element.animate() ) has enabled developers to more easily create high-performance visual effects with lower risk of visual stuttering in Chrome and Firefox since 2014. Critical in adapting web content to mobile, particularly regarding multi-touch gestures.

Media 145

Media Games Education Engineering 145

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. Search for recent blog posts on Linux containers, and try them out, and you'll piece together their capabilities and workings bit by bit. 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

JULY 20, 2015

This architecture affords Amazon ECS high availability, low latency, and high throughput because the data store is never pessimistically locked. As you can see, the latency remains relatively jitter-free despite large fluctuations in the cluster size. latency and stability) with Empire as well as security benefits.

Latency 166

Latency Architecture AWS Open Source 166