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

Scalegrid

APRIL 16, 2020

While this is a good way to get a rough estimate, your monthly cloud costs will indeed vary based on the amount of backups performed and your data transfer activity. Deploying your application and database on the same VPC also provides the lowest possible latency path. This becomes really important for cache solutions like Redis™.

Cloud 242

Cloud Azure AWS Database 242

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map. cachestat File system cache statistics line charts. runqlat CPU scheduler latency heat map. biolatency Disk I/O latency histogram heat map. cachestat File system cache statistics line charts. runqlat CPU scheduler latency heat map. opensnoop Files opened table.

Latency 145

Latency Cache Energy Systems 145

ScaleOut Software

JULY 21, 2020

For more than fifteen years, ScaleOut StateServer® has demonstrated technology leadership as an in-memory data grid (IMDG) and distributed cache. Designed to help scalable applications deliver high performance, it stores live, fast-changing data in memory (DRAM) for fast updates and retrieval. The Challenges with Parallel Queries.

Analytics 52

Analytics Airlines Cache Scalability 52

ScaleOut Software

JULY 21, 2020

For more than fifteen years, ScaleOut StateServer® has demonstrated technology leadership as an in-memory data grid (IMDG) and distributed cache. Designed to help scalable applications deliver high performance, it stores live, fast-changing data in memory (DRAM) for fast updates and retrieval. The Challenges with Parallel Queries.

Analytics 52

Analytics Airlines Cache Scalability 52

Scalegrid

MARCH 28, 2024

In this comparison of Redis vs Memcached, we strip away the complexity, focusing on each in-memory data store’s performance, scalability, and unique features. Redis and Memcached both provide high performance with sub-millisecond response times. Choosing between Redis and Memcached hinges on specific application requirements.

Cache 130

Cache Storage Scalability Architecture 130

Brendan Gregg

JULY 2, 2021

biolatency Disk I/O latency histogram heat map 5. cachestat File system cache statistics line charts 7. runqlat CPU scheduler latency heat map 10. biolatency Disk I/O latency histogram heat map 5. cachestat File system cache statistics line charts 7. runqlat CPU scheduler latency heat map 10.

Open Source 40

Open Source Latency Cache Energy 40

Sutter's Mill

FEBRUARY 13, 2017

Tue-Thu Apr 25-27: High-Performance and Low-Latency C++ (Stockholm). On April 25-27, I’ll be in Stockholm (Kista) giving a three-day seminar on “High-Performance and Low-Latency C++.” Here is the summary, below; for a more detailed topic breakdown see the link above. Description.

Latency 50

Latency C++ Hardware Performance 50

The Morning Paper

FEBRUARY 6, 2020

Last week we looked at a function shipping solution to the problem; Cloudburst uses the more common data shipping to bring data to caches next to function runtimes (though you could also make a case that the scheduling algorithm placing function execution in locations where the data is cached a flavour of function-shipping too).

Serverless 98

Serverless Lambda Cache Latency 98

The Netflix TechBlog

JULY 12, 2019

The Tech Hollow , an OSS technology we released a few years ago, has been best described as a total high-density near cache : Total : The entire dataset is cached on each node?—?there there is no eviction policy, and there are no cache misses. Near : the cache exists in RAM on any instance which requires access to the dataset.

Cache 183

Cache Architecture Latency Engineering 183

High Scalability

JULY 20, 2018

Yet we still program with text—in files. That means multiple data indirections mean multiple cache misses. This is where your performance goes. He told me his work in functional programming languages failed, and would likely always fail, because it was easy to do hard things but incredibly difficult to do simple things.

Internet 121

Internet Internet Scalability Automotive 121

Dynatrace

NOVEMBER 3, 2021

Monitoring , by textbook definition, is the process of collecting, analyzing, and using information to track a program’s progress toward reaching its objectives and to guide management decisions. Because monitoring tends to focus on key indicators such as utilization rates and throughput, monitoring indicates overall system performance.

Monitoring 213

Monitoring Metrics DevOps Scalability 213

All Things Distributed

JULY 14, 2015

In this blog post, I will explain how these three new capabilities empower you to build applications with distributed systems architecture and create responsive, reliable, and high-performance applications using DynamoDB that work at any scale. The stream is exposed via the familiar Amazon Kinesis interface. DynamoDB Cross-region Replication.

Database 167

Database Lambda AWS IoT 167

Dynatrace

OCTOBER 4, 2022

These include application programming interfaces, streaming, and more. The performance of these queries needs to be at a level where they can support ad-hoc analytics use cases. Data lakehouses deliver the query response with minimal latency. So, usage can become overwhelming if organizations do not carefully manage it.

Artificial Intelligence 202

Artificial Intelligence Storage Analytics Government 202

The Morning Paper

JUNE 23, 2019

Generally to cache data (including non-persistent data that never sees a backing store), to share non-persistent data across application services (e.g. ” Even re-reading that today, the letter of the law there is surprisingly strict to me: you can use the local memory space or filesystem as a brief single transaction cache, but no more.

Cache 79

Cache Latency Google Lambda 79

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

John McCalpin

AUGUST 1, 2018

Bandwidth, performance analysis has two recurring themes: How fast should this code (or “simple” variations on this code) run on this hardware? If I am analyzing (apparent) performance shortfalls, how can I distinguish between cause and effect ? The processor hardware available to support shared-memory transport.

Hardware 40

Hardware Transportation Performance Latency 40

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. The Twizzler programming model.

Hardware 56

Hardware Programming Media Storage 56

Alex Russell

APRIL 29, 2021

Classics of the genre include: Apple's just focused on performance! The Performance Argument. As an engineer on a browser team, I'm privy to the blow-by-blow of various performance projects, benchmark fire drills, and the ways performance marketing (deeply) impacts engineering priorities. Web Performance APIs.

Media 145

Media Games Education Engineering 145

Smashing Magazine

AUGUST 20, 2021

Ben and Mena Trott created MovableType because of a “Dissatisfacion with existing blog CMSes — performance, stability.” In 2006, Denis Defreyne tried to set up a Ruby-based blog platform and ran into performance problems — “Having a VPS with only 96 MB of RAM, any Ruby-based CMS ran extremely slowly.”

Ecommerce 140

Ecommerce Website Government Internet 140

Brendan Gregg

JANUARY 17, 2018

The tools use either the referenced or the idle page flags to measure a page-based WSS, and were developed out of necessity for another performance problem. ## Method 1: Referenced Page Flag This uses a kernel feature added in Linux 2.6.22: the ability to set and read the referenced page flag from user space, added for analyzing memory usage.

Cache 71

Cache Latency C++ Programming 71

The Morning Paper

MAY 12, 2019

The paper examines the implications of microservices at the hardware, OS and networking stack, cluster management, and application framework levels, as well as the impact of tail latency. Smaller microservices demonstrated much better instruction-cache locality than their monolithic counterparts. Hardware implications.

Open Source 61

Open Source Hardware Benchmarking Systems 61

The Morning Paper

NOVEMBER 17, 2019

For example, to reduce latency, serverless platforms try to reuse the same function instance to process multiple requests. Serverless functions are stateless , but can opportunistically reuse cached state across invocations to speed up start times. Don’t do that! A naive semantics, and when it is safe to use.

Serverless 58

Serverless Lambda Programming Cache 58

Brendan Gregg

JANUARY 16, 2018

The tools use either the referenced or the idle page flags to measure a page-based WSS, and were developed out of necessity for another performance problem. ## Method 1: Referenced Page Flag This uses a kernel feature added in Linux 2.6.22: the ability to set and read the referenced page flag from user space, added for analyzing memory usage.

Cache 40

Cache Latency C++ Programming 40

SQL Server According to Bob

JANUARY 11, 2020

This will help you increase system performance and avoid I/O environment errors. Atomicity A transaction must be an atomic unit of work; either all of its data modifications are performed or none of them are performed. This cache is often supported by a battery-powered backup facility.

Servers 40

Servers Cache Media Hardware 40

SQL Performance

APRIL 8, 2019

The L3 cache size is 64MB. The AMD EPYC 7551 processor has slightly lower single-threaded CPU performance when compared to the older 2.3 The L3 cache size is 64MB. They feature low latency, local NVMe storage that can directly leverage the 128 PCIe 3.0 lanes for I/O connectivity. They also only have 40 PCIe 3.0

Azure 42

Azure Virtualization Storage Benchmarking 42

Enprowess

SEPTEMBER 7, 2021

JavaScript is one of the most famous and loved programming languages nowadays. It is growing day by day and has kept its position for eight years in a row and belongs to the top ten most loved programming languages. Enhanced performance: It has an Asynchronous or Non-blocking nature. Server development: Node has in-built APIs.

Open Source 52

Open Source Virtualization Programming Servers 52

SQL Server According to Bob

JANUARY 11, 2020

​​ With new ​​ innovations ​​ come ​​ new terms, designs, ​​ and ​​ algorithms. The ​​ SQL Server 2000 I/O Basics ​​ document is a prerequisite to ​​ the information contained in this ​​ document.

Servers 40

Servers Cache Database Media 40

John McCalpin

NOVEMBER 5, 2016

In recent years the trend has been to increase core-level performance by the use of SIMD vector instructions, and to increase package-level performance by the addition of more and more cores. With 2 FMA units that have 5-cycle latency, the code must implement at least 2*5=10 independent accumulators in order to avoid stalls.

Cache 40

Cache C++ Latency Hardware 40

The Morning Paper

SEPTEMBER 12, 2019

SQL provides a declarative programming interface, below which the system itself can figure out the most effective execution plans based on data size and statistics, layout, compute hardware etc. Clearly the chosen decomposition can have a big impact on the resulting query performance. Be careful what you ask for (materialize).

Network 44

Network Database Programming Hardware 44

Smashing Magazine

AUGUST 9, 2021

You’ve probably heard things like: “HTTP/3 is much faster than HTTP/2 when there is packet loss”, or “HTTP/3 connections have less latency and take less time to set up”, and probably “HTTP/3 can send data more quickly and can send more resources in parallel”. HTTP/3 performance features ( coming up soon! ).

Transportation 145

Transportation Internet Internet Network 145

KeyCDN

FEBRUARY 14, 2019

That said, GIFs can drag down a web page’s performance, especially if not optimized. Even if you’re happy with how your website is performing, you may not realize how much weight your GIFs are adding to each page. A CDN will pull the GIF files from your origin server and cache them. Why Speed Up GIF Animations?

Speed 50

Speed Website Latency Cache 50