Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. What about short-lived processes, like a service restarting in a loop? Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 52

Speed Java AWS Virtualization 52

Dynatrace

JUNE 27, 2022

Real user monitoring (RUM) is a performance monitoring process that collects detailed data about users’ interactions with an application. In some cases, you will lack benchmarking capabilities. Complex transaction and process monitoring that might have deeper dependencies. What is real user monitoring?

Best Practices 172

Best Practices Monitoring Wireless Traffic 172

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. What about short-lived processes, like a service restarting in a loop? Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? What on Earth is Ubuntu doing that results in 30% higher CPU time!?

Speed 40

Speed Java AWS Virtualization 40

Particular Software

SEPTEMBER 20, 2021

Sometimes developers only care about speed. Some will claim that any type of RPC communication ends up being faster (meaning it has lower latency) than any equivalent invocation using asynchronous messaging. But to be fair, we also have to process the messages on the server before we can consider the messaging case to be complete.

Benchmarking 97

Benchmarking Latency Servers Systems 97

Scalegrid

JANUARY 12, 2024

In the realm of cloud-based business operations, there is an increasing dependence on complex information processing patterns. To this vital function is workload automation which optimizes scheduling, execution, and monitoring processes for each individual task or process within cloud-based workflows.

Cloud 130

Cloud Virtualization Storage Efficiency 130

John McCalpin

APRIL 2, 2020

To show that I can criticize my own work as well, here I show that sustained memory bandwidth (using an approximation to the STREAM Benchmark ) is also inadequate as a single figure of metric. (It Building separate models for each of the benchmarks was required to get the correct asymptotic properties.

Benchmarking 59

Benchmarking Performance Latency Architecture 59

Adrian Cockcroft

JANUARY 20, 2023

Here’s some predictions I’m making: Jack Dongarra’s efforts to highlight the low efficiency of the HPCG benchmark as an issue will influence the next generation of supercomputer architectures to optimize for sparse matrix computations. In early January a related paper was published by Satoshi Matsuoka et. petaflops, which is 0.8%

Architecture 52

Architecture Latency Benchmarking AWS 52

Percona

JUNE 22, 2023

Query performance Query performance is a key performance indicator (KPI) in MySQL, as it measures the efficiency and speed of query execution. Replication lag can occur due to various factors such as network latency, system resource limitations, complex transactions, or heavy write loads on the primary/master database.

Performance 106

Performance Monitoring Traffic Database 106

Percona

MARCH 23, 2023

As datasets continue to grow in size, the amount of RAM required to store and process these datasets also increases. Benchmark before you decide. But also larger log files mean that the recovery process will be slower in case of a crash. Transparent huge pages (THP) disabled. Refer to innodb_redo_log_capacity below.

Performance 127

Performance Hardware Tuning Storage 127

Alex Russell

JANUARY 30, 2024

HTML, CSS, images, and fonts can all be parsed and run at near wire speeds on low-end hardware, but JavaScript is at least three times more expensive, byte-for-byte. Meanwhile, budget segment devices have finally started to see improvement ( as this series predicted ), thanks to hand-me-down architecture and process node improvements.

Performance 90

Performance Network Mobile Speed 90

Speed Curve

MAY 1, 2023

If you've invested countless hours in speeding up your pages, but you're not using performance budgets to prevent regressions, you could be at risk of wasting all your efforts. INP logs the latency of all interactions throughout the entire page lifecycle. It's easier to make a fast website than it is to keep a website fast.

Performance 98

Performance Metrics Media Google 98

Percona

JANUARY 24, 2023

There will be a considerable gain if we combine this with other sets of great improvements in WAL archiving in PostgreSQL 15, as discussed in previous posts New WAL Archive Module/Library in PostgreSQL 15 and Speed Up of the WAL Archiving in PostgreSQL 15. But this comes with a considerable performance implication.

Database 118

Database Benchmarking Open Source Latency 118

Alex Russell

MAY 9, 2022

This is a complex topic, but to borrow from a recent post , web performance expands access to information and services by reducing latency and variance across interactions in a session, with a particular focus on the tail of the distribution (P75+). Consistent performance matters just as much as low average latency.

Performance 86

Performance Latency Metrics Engineering 86

Alex Russell

MARCH 6, 2021

Advances in browser content processing. Using a global ASP as a benchmark can further mislead thanks to the distorting effect of ultra-high-end prices rising while shipment volumes stagnate. Recall that single-core performance most directly translates into speed on the web. Modern network performance and availability.

Performance 124

Performance Network Cache Metrics 124

CSS - Tricks

APRIL 1, 2021

Google’s industry benchmarks from 2018 also provide a striking breakdown of how each second of loading affects bounce rates. Speed is also something Google considers when ranking your website placement on mobile. Speed is also something Google considers when ranking your website placement on mobile.

Cache 92

Cache Social Media Media Website 92

Percona

SEPTEMBER 1, 2023

A finely tuned database processes queries more efficiently, leading to swifter results. This reduction in latency ensures that applications and websites provide a more rapid and responsive user experience. This is more than enough so that MySQL can reorder writes to use sequential I/O during the flushing and checkpointing processes.

Tuning 52

Tuning Database Performance Hardware 52

Tim Kadlec

APRIL 18, 2019

Even if it is 4G (5G, or whatever else) that doesn’t exactly guarantee you’ll be getting the amazing, theoretical speeds promised. Once a new network does get rolled out, it takes years for carriers to optimize it to try and close in on the promised bandwidth and latency benchmarks.

Network 61

Network Speed Internet Internet 61

KeyCDN

AUGUST 15, 2019

Before you begin tuning your website or application, you must first figure out which metrics matter most to your users and establish some achievable benchmarks. When the word “performance” is heard, most people immediately think of speed. Memory utilization: The amount of memory required to process a request.

Testing Tools 55

Testing Tools Best Practices Performance Testing Testing 55

Smashing Magazine

SEPTEMBER 28, 2022

Every unnecessary bit of JavaScript code you bundle and serve will be more code the client has to load and process. On your first try, you can use it as a benchmark for optimizations later. Data-loading patterns are one way you can optimize your applications’ speed. The rule of thumb is the less, the better. Caching Schemes.

Cache 125

Cache Performance Servers Social Media 125

Alex Russell

OCTOBER 22, 2017

Budgets are scaled to a benchmark network & device. Answering it requires an understanding of how browsers process resources (which differs by type) and the concept of the critical path. This input processing happens on document’s main thread , where JavaScript runs. ” A good question! Construction of DOM.

Performance 68

Performance Benchmarking Network Mobile 68

Smashing Magazine

JANUARY 11, 2021

Micro-optimizations are great for keeping performance on track, but it’s critical to have clearly defined targets in mind — measurable goals that would influence any decisions made throughout the process. Note : If you use Page Speed Insights or Page Speed Insights API (no, it isn’t deprecated!), Large preview ).

Performance 145

Performance Cache Media Metrics 145

Smashing Magazine

JANUARY 6, 2020

So, if we created an overview of all the things we have to keep in mind when improving performance — from the very start of the process until the final release of the website — what would that list look like? Establish a performance culture. Treo Sites provides competitive analysis based on real-world data. Large preview ).

Performance 145

Performance Cache Network Metrics 145

Rigor

OCTOBER 30, 2019

The Lighthouse Performance score is based on some of the most important performance metrics : First Contentful Paint, First Meaningful Paint, Speed Index, Time to Interactive, First CPU Idle, and Estimated Input Latency. Data granularity becomes more important as your development processes mature.

Google 51

Google Best Practices Energy Website 51

The Netflix TechBlog

SEPTEMBER 2, 2020

When a problem occurs, we put on our detective hats and start our mystery-solving process by gathering evidence. Distributed tracing is the process of generating, transporting, storing, and retrieving traces in a distributed system. For engineers, instead of whodunit, the question is often “what failed and why?”

Latency 296

Latency Transportation Engineering Traffic 296

HammerDB

OCTOBER 12, 2018

For anyone benchmarking MySQL with HammerDB it is important to understand the differences from sysbench workloads as HammerDB is targeted at a testing a different usage model from sysbench. maximum transition latency: Cannot determine or is not supported. . Fortunately HammerDB allows all of this process to be automated.

Best Practices 40

Best Practices Scalability Performance C++ 40

SQL Server According to Bob

JANUARY 11, 2020

Many high-end disk subsystems provide high-speed cache facilities to reduce the latency of read and write operations. Because the log record for a page modification does not ​​ exist, the recovery process cannot determine the proper transactional state of the page. Latch page 150 to prevent further modifications.

Servers 40

Servers Cache Media Hardware 40

SQL Server According to Bob

JANUARY 11, 2020

DBCC Page Auditing DBCC page auditing is the process of executing common DBCC consistency checks as pages are read from disk. The 832 message indicates a serious process stability problem, such as a scribbler, ​​ that could ​​ lead to data corruption and ​​ ​​ loss.

Servers 40

Servers Cache Database Media 40