HammerDB

OCTOBER 17, 2018

However most people use HammerDB with keying and thinking time disabled and therefore each virtual user can approximately drive the CPU resources of one CPU core on the database server. By default each virtual user has the concept of a home warehouses where approximately 75% of its workload will take place.

C++ 40

C++ Testing Virtualization Cache 40

SQL Performance

NOVEMBER 18, 2019

Migrating an on-premises SQL Server instance to an Azure Virtual Machine (VM) is a common method to migrate to Azure. Microsoft has helped simplify things by creating multiple types of virtual machines. Memory optimized – High memory-to-CPU ratio, relational database servers, medium to large caches, and in-memory analytics.

Azure 76

Azure Benchmarking Storage Virtualization 76

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. Consider the above example of querying shopping carts exceeding a threshold value. 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. Consider the above example of querying shopping carts exceeding a threshold value. The Challenges with Parallel Queries.

Analytics 52

Analytics Airlines Cache Scalability 52

Smashing Magazine

SEPTEMBER 20, 2021

For example, someone might web scrape all the product pages of a competitor’s retail site to harvest information about products being offered and current pricing to try to gain a competitive edge. Search Engine And Web Archive Cached Results. The message that appears above a cached search result in Google’s search service.

Website 90

Website Analytics Cache Google 90

Brendan Gregg

AUGUST 18, 2019

For example, iostat(1), or a monitoring agent, may tell you your average disk latency, but not the distribution of this latency. This example instrumented one of many thousands of available events. bpftrace uses BPF (Berkeley Packet Filter), an in-kernel execution engine that processes a virtual instruction set. bashreadline.bt

Latency 68

Latency C++ Cache Programming 68

ACM Sigarch

FEBRUARY 23, 2018

In his book “ Misbehaving: The Making of Behavioral Economics ”, he cites example after example of how human behavior does not follow economic expectations based on rational behavior, resulting in flawed economic models . Virtualization, for instance, was being addressed by IBM in the 1960s. Present Bias.

Architecture 47

Architecture Cache Hardware Virtualization 47

The Netflix TechBlog

NOVEMBER 9, 2022

While we understand it’s virtually impossible to achieve a linear increase in throughput as the number of vCPUs grow, a near-linear increase is attainable. We also see much higher L1 cache activity combined with 4x higher count of MACHINE_CLEARS. Cache line is a concept similar to memory page?—? Thread 0’s cache in this example.

Hardware 363

Hardware Cache Performance Latency 363

Smashing Magazine

APRIL 11, 2022

We can use the preload attribute for the HTML link element to optimize loading performance by ensuring that the browser discovers the resource earlier, downloads it, and caches it. For example, let’s say that we are loading two render-blocking stylesheets. Examples And Use Cases. Jump to table of contents ?. Large preview ).

Media 70

Media Tuning Metrics Google 70

Randon ASCII

OCTOBER 15, 2018

A long-standing correctness bug in the Windows file cache: Compiler bug? App Verifier causes your program to run more slowly, both because allocations are now more expensive and because the page-aligned allocations mean that your CPU’s cache is mostly neutered. Linker bug? Windows Kernel bug. You can’t make an O(N^2) algorithm be good.

Processing 57

Processing Cache Programming Virtualization 57

The Netflix TechBlog

SEPTEMBER 24, 2021

As an example, cloud-based post-production editing and collaboration pipelines demand a complex set of functionalities, including the generation and hosting of high quality proxy content. The following table gives us an example of file sizes for 4K ProRes 422 HQ proxies. For write operations, those challenges do not apply.

Cloud 237

Cloud Media Storage Cache 237

Brendan Gregg

MARCH 16, 2024

To explain this example in more detail: The profiler periodically interrupts software execution, and for those disconnected stacks it happens to be the execution of the kernel software ("vfs*", "ext*", etc.). These partial stacks get grouped together on the left. Click here for a longer explanation. You usually get an extra junk frame.

Java 145

Java Cache Google Hardware 145

SQL Performance

DECEMBER 17, 2019

One important choice you will still have to make is what type and size of Azure virtual machine you want to use for your existing SQL Server workload. Microsoft currently has eight main types of virtual machines designed for different types of workloads. For example, compare the three possible VM choices shown in Figure 3.

Azure 72

Azure Virtualization Servers Storage 72

Smashing Magazine

JUNE 30, 2021

For example, some of the newer pixel phones have a 90Hz screen and the iPad Pro has a 120Hz screen, reducing the frame budget to 11.1ms and 8.3ms respectively. AudioWorklet , CSS Painting API and Animation Worklet are examples of Worklets. For example, every message you send needs to be copied.

Games 145

Games Architecture Code C++ 145

The Morning Paper

SEPTEMBER 24, 2020

Static analysis of Java enterprise applications: frameworks and caches, the elephants in the room , Antoniadis et al., This means for example that it can be applied to analyse source code repositories and pull requests, be used as an additional test in CI pipelines, and even give assistance in your IDE if it’s fast enough.

Java 80

Java Cache Benchmarking Programming 80

SQL Server According to Bob

DECEMBER 18, 2018

For example, if a flight booking reports that a seat has successfully been booked, then the seat will remain booked even if the system crashes.” – [link]. Device level flushing may have an impact on your I/O caching, read ahead or other behaviors of the storage system. Linux open command flag used to bypass file system cache.

Servers 90

Servers Media Cache Storage 90

Percona

SEPTEMBER 1, 2023

For example, if an UPDATE statement modifies 100 rows, a statement-level trigger related to that statement will execute only once for the entire statement. Here are a few examples: Audit Logging : In compliance-driven industries like finance or healthcare, it’s crucial to maintain an audit trail of database changes.

Cache 61

Cache Database Games Healthcare 61

HammerDB

JUNE 27, 2022

An important concept was to simulate database users called Virtual Users in parallel (rather than concurrently) to accurately simulate a real database workload with multiple users running from separate systems. Cached vs Scaled Workloads. The workload also outputted the data from the Virtual Users by simulating individual terminals.

Benchmarking 62

Benchmarking Open Source C++ Cache 62

All Things Distributed

SEPTEMBER 3, 2013

For example, even within relational databases, some of the 3rd party apps we use at Amazon are only certified to run using Oracle databases whereas others use MySQL databases. Amazon ElastiCache is a fully managed, in-memory caching service for customers to optimize the latency, performance and cost of their read workloads.

Cache 129

Cache Cloud Performance Retail 129

Smashing Magazine

AUGUST 30, 2021

Even in this basic example, we’ve managed to reduce the overall file size from 76 bytes to 55 bytes, resulting in a 23% reduction. Let’s consider the following example of an unoptimized CSS codebase.page { display: grid; grid-gap: 16px; } @media (min-width: 768px) {.page . /* Before - optimized code with formatting */.container

Media 110

Media Performance Cache Strategy 110

IO River

NOVEMBER 2, 2023

For example, if you’re deploying the infrastructure for an e-commerce website, security becomes a fundamental requirement. For example, the first 10TB to South America cost $0.11.Source: For example, Lambda@Edge request pricing is $0.6 However, if your traffic is dynamic, you'll need a CDN that can adapt.Â

Infrastructure 52

Infrastructure Traffic Cache Strategy 52

Percona

APRIL 7, 2023

But since retrieving data from disk is slow, databases tend to work with a caching mechanism to keep as much hot data, the bits and pieces that are most often accessed, in memory. In MySQL, considering the standard storage engine, InnoDB , the data cache is called Buffer Pool. In PostgreSQL, it is called shared buffers.

Tuning 136

Tuning Cache Servers Benchmarking 136

Scalegrid

FEBRUARY 8, 2024

Nevertheless, strategies like using content delivery networks (CDNs), implementing effective caching mechanisms for data retrieval efficiency, refining network traffic routing methods, and incorporating compression technologies can help overcome these obstacles.

Storage 130

Storage Systems Big Data Azure 130

IO River

NOVEMBER 2, 2023

For example, if you’re deploying the infrastructure for an e-commerce website, security becomes a fundamental requirement. For example, the first 10TB to South America cost $0.11.Source: For example, Lambda@Edge request pricing is $0.6 What features are important to you? Some CDNs offer features like security and load balancing.

Infrastructure 52

Infrastructure Traffic Cache Strategy 52

SQL Performance

APRIL 8, 2019

Back on December 5, 2017, Microsoft announced that they were using AMD EPYC 7551 processors in their storage-optimized Lv2-Series virtual machines. The pricing details for the East US region are here , as an example. The L3 cache size is 64MB. The L3 cache size is 64MB. lanes for I/O connectivity. Azure Lsv2 Details.

Azure 42

Azure Virtualization Storage Benchmarking 42

Dynatrace

APRIL 21, 2022

Getting precise root cause analysis when dealing with several layers of virtualization in a containerized world. Let’s look at an example. Missing caching layers. For example, on the left side, we see a breakdown of how much time various types of calls contribute to other services.

Azure 188

Azure Monitoring Virtualization Metrics 188

DZone

DECEMBER 28, 2020

Virtual Tables. If you're using MySQL or any other SQL-based database, using virtual tables is the best thing that you can do. Let's look at an example. Let's discuss a few points to help you understand how we can work more of performance optimization. This process may take some time.

Performance 189

Performance Virtualization Database Processing 189

ScaleOut Software

MAY 15, 2014

For example, the IMDG must be able to efficiently create millions of objects in each server to make use of its huge storage capacity. Given all this, we thought it would be a good opportunity to see how we are doing relative to the competition, and in particular, relative to Microsoft’s AppFabric caching for Windows on-premise servers.

Cache 40

Cache Servers Network Design 40

Percona

APRIL 17, 2023

Operating System (OS) settings Swappiness Swappiness is a Linux kernel setting that influences the behavior of the Virtual Memory manager when it needs to allocate a swap, ranging from 0-100. For example, on a 128GB memory host, this can allow up to 38.4GB of dirty pages. Without further ado, let’s start with the OS settings.

Best Practices 52

Best Practices Design Tuning Database 52

IO River

NOVEMBER 2, 2023

Given its unchanging nature, static content is ideal for caching. This example clearly illustrates that the bandwidth should be larger than the user's consumption rate, ensuring the video downloads faster than the rate at which it's being watched.Therefore, ensuring decent bandwidth should be your main focus. The result?

Architecture 52

Architecture Performance Internet Internet 52

Enprowess

MAY 24, 2022

More incredible Speed with Virtual DOM. Reactjs can help your business in web and mobile application development by bringing fast speed using the virtual DOM. Virtual DOM of React refreshes only parts of the page, so it is faster than the conventional full refresh model. Virtual DOM is an additional feature offered by React.

Mobile 52

Mobile Open Source Virtualization Speed 52

Percona

MAY 15, 2023

In both cases, when using virtually-synchronous replication, the process will require certification from each node and local (by node) write; as such, the number of writes is NOT distributed across multiple nodes but duplicated. Because the solutions still rely on writing in one single node that works as Primary. Why ProxySQL?

Traffic 124

Traffic Scalability Database Servers 124

Smashing Magazine

OCTOBER 31, 2023

For example, the data is pretty slow to update, refreshing every 28 days, meaning it is not the same as real-time monitoring. For example, we could add throttling to the test environment to enforce an artificial condition where the test opens the page on a slower connection. But it comes with caveats.

Speed 99

Speed Google Website Metrics 99

Tim Kadlec

JUNE 17, 2008

When a variable is global in scope, it could be being instantiated virtually anywhere making it tough to track down. Another handy way of utilizing the registry pattern, is to use our Registry instance to create and then cache an object, skipping the need for a set or get function. Debugging code also becomes difficult.

Cache 40

Cache Code Virtualization Testing 40

IO River

NOVEMBER 2, 2023

This example clearly illustrates that the bandwidth should be larger than the user's consumption rate, ensuring the video downloads faster than the rate at which it's being watched.Therefore, ensuring decent bandwidth should be your main focus. By the time the player needs it, the content is already cached and ready to go. The result?

Architecture 52

Architecture Performance Internet Internet 52

IO River

NOVEMBER 2, 2023

‍Before we dive into what Terraform is, let's begin with a real-world example of how Terraform code looks and works:‍# Challenge requests coming from known Tor exit nodes.‍‍In ‍In the example above, we're using Terraform to set up an access rule on Cloudflare. What is Terraform?‍Before So, What Exactly is Terraform?

Open Source 52

Open Source DevOps AWS Infrastructure 52

Rigor

NOVEMBER 7, 2019

Let’s dive into the specifics of the CPDoS attack , explore how it is just a transient example of a more fundamental issue , and discuss how you can protect yourself from future issues. This means parts of your site are copied and cached on dozens or hundreds of different points-of-presence around the globe. Lots of locations.

Monitoring 40

Monitoring Performance Cache Ecommerce 40