Dynatrace

FEBRUARY 1, 2024

When looking for the unknown, you often stumble upon an unexpected thread of evidence that sparks a new idea and takes the investigation in a new direction. Enabling the multi-line content details view shows the stack traces with their line breaks in their original form, enabling you to understand the data much faster.

Speed 205

Speed Games Efficiency Processing 205

DZone

MARCH 28, 2021

Deadlocks tend to happen in multi-threaded applications. In this series of chaos engineering articles, we have been learning to simulate various performance problems. In this post, let’s discuss how to simulate deadlock. What Is a Deadlock?

Engineering 187

Engineering Processing Performance Java 187

Dynatrace

NOVEMBER 29, 2021

Workloads using multi-threading and multi-processing, or performing many I/O operations, can experience lower execution time and, consequently, even lower costs based on execution time and configured memory size. With Graviton2, you can reduce execution duration. Monitor your Graviton2-powered Lambda functions out of the box.

Lambda 218

Lambda AWS Serverless Metrics 218

n0derunner

APRIL 1, 2024

Running iperf with parallel threads TL;DR – When running iperf with parallel threads/workers the -P option must be specified after the -c <target-IP> option.

C++ 40

C++ Network 40

The Netflix TechBlog

MARCH 13, 2020

Compared to the most recent master version of libaom (AV1 reference software), SVT-AV1 is similar in compression efficiency and at the same time achieves significantly lower encoding latency on multi-core platforms when using its inherent parallelization capabilities. A single-threaded compression mode is used.

Open Source 154

Open Source Efficiency C++ Speed 154

Percona

DECEMBER 11, 2023

Benchmark results for DLV-enabled instance vs. standard instance Write-only traffic Read-write traffic Read-only traffic Benchmarking analysis For both read-only and read-write traffic, there is a constant improvement in the QPS counters as the number of threads increases.

AWS 93

AWS Benchmarking Performance Traffic 93

Scalegrid

JANUARY 8, 2019

The first consideration is to handle the ‘semi’ behavior of semisynchronous replication which only guarantees that the data has been received and flushed to the relay logs by the I/O thread of the slave, but not necessarily committed by the SQL thread. This is necessary to preserve data consistency. slave_preserve_commit_order = 1.

Availability 113

Availability Tuning Speed Network 113

Scalegrid

OCTOBER 24, 2019

xlarge (Multi-AZ). Multi-AZ Deployment with 1 Read Replica. Each scenario is run with varying number of sysbench client threads ranging from 50 to 400, and each test is run for a duration of 10 minutes. This is almost a 200% increase over MySQL RDS performance which averages only 9,411 QPS across the same range of threads.

AWS 183

AWS Latency Performance Benchmarking 183

High Scalability

NOVEMBER 9, 2018

Paul Alcorn ~ The 7nm Rome CPUs come with 64 physical Zen 2 cores, which equates to 128 threads per processor, double that of the first-gen Naples chips. In a two socket server, that equates to 128 physical cores and 256 threads in a single box. MLPerf's deadline is also soon ([link] ). Rome is also the first PCIe 4.0

Internet 192

Internet Internet Scalability Blockchain 192

Randon ASCII

JANUARY 17, 2023

Some of the SearchApp threads were named (yay!) but not all of them were and I couldn’t find the main thread to see what it was waiting on, so I had to poke around and hope something became obvious. but the main thread was easily identifiable as the one using the most CPU time. So now we understand the problem. Conclusions.

Programming 114

Programming Processing Code Performance 114

Dynatrace

OCTOBER 22, 2019

Threads enable your application to execute multiple tasks at the same time. This is why threads are often the source of scalability as well as performance issues. If your system is under high load, it can run into thread-locking issues that prevent upward linear scaling of your application. Dynatrace news.

Java 103

Java Scalability Hardware Architecture 103

Percona

MARCH 21, 2023

By default, the replication threads use the privileges of the MySQL user account configured for replication. The replication threads will use the limited privileges of the PRIVILEGE_CHECKS_USER account, which can help prevent the execution of unauthorized SQL statements or the manipulation of sensitive data.

Storage 84

Storage Open Source Database Engineering 84

SQL Performance

MAY 3, 2021

It’s a basic tenet of computer science that whenever a data structure exists in a multi-threaded system, the data structure must be protected in some way. This protection gives the following provisos: (Guaranteed) A data structure cannot be changed by a thread while another thread is reading it. Acquiring a Latch.

Servers 98

Servers Tuning Scalability Systems 98

Smashing Magazine

JUNE 30, 2021

There is a way to break from running in lock-step with the browser’s rendering thread. We can move some of our code to a different thread. A web worker can be constructed by passing in the path to a separate JavaScript file that will be loaded and run in this newly created thread: const worker = new Worker("./worker.js");

Games 145

Games Architecture Code C++ 145

The Morning Paper

MAY 16, 2019

A major design goal of Go is to improve traditional multi-threaded programming languages and make concurrent programming easier and less error-prone. Goroutines are lightweight user-level threads (‘green’ threads). Goroutines are lightweight user-level threads (‘green’ threads). and 43% of all usages.

Programming 100

Programming C++ Design Code 100

Percona

FEBRUARY 24, 2023

For example, an Amazon Elastic Compute Cloud (EC2) instance with Graviton2 processors will be a better choice than non-ARM options, as it’s cheaper, and you will get real and faster cores which means the CPU cores are physical and not with hyper-threading. Multi-AZ deployments offer advantages, especially for HA and disaster recovery.

Cloud 116

Cloud Serverless AWS Storage 116

High Scalability

SEPTEMBER 8, 2018

RISELabs , those wonderfully innovative folks over at Berkeley, have uplifted their Anna datatabase —a shared-nothing, thread-per-core architecture to achieve lightning-fast speeds by avoiding all coordination mechanisms—to become cloud-aware. What's changed ? As you can imagine, that was unreasonably expensive.

Storage 199

Storage Performance AWS Efficiency 199

Randon ASCII

OCTOBER 4, 2020

This actually shouldn’t be done very often – threads should normally be waiting on events rather than timers – but it is sometimes necessary. Ideally the CPU goes to sleep when Sleep(1) is called, in order to save power, so how does the operating system (OS) wake your thread if the CPU is sleeping? The answer is hardware interrupts.

Programming 145

Programming Games Hardware Operating System 145

Scalegrid

JULY 29, 2020

Multi-cluster support. Pgpool-II does not have multi-cluster support. All tests ran as a single thread, on a single-CPU, 2-core machine, for a duration of 5 minutes. Supports automatic load balancing – is even intelligent enough to redirect read requests to standbys, and writes to masters. Connection control.

Benchmarking 246

Benchmarking Database Performance Testing Availability 246

High Scalability

SEPTEMBER 7, 2018

Once inside the function, there's nothing wrong with multi-threading to do the work as efficiently as possible. Whod a thought that one would be able to run an 8-core/16-thread CPU at full load at only 85W and still reap. @sapessi : Lambda simplifies concurrency at the frontend, enforcing one event per function at a time.

Internet 137

Internet Internet Scalability Lambda 137

HammerDB

JULY 5, 2022

elseif {$choice <= 20} { payment $lda $w_id $w_id_input } elseif {$choice <= 21} { delivery $lda $w_id } elseif {$choice <= 22} { slev $lda $w_id $stock_level_d_id } elseif {$choice <= 23} { ostat $lda $w_id } } pg_disconnect $lda thread::wait }] } vwait forever. Use a different Browser. #!/usr/local/bin/tclsh8.6

Benchmarking 98

Benchmarking Database C++ Virtualization 98

Randon ASCII

FEBRUARY 16, 2021

Near the end of January I was pointed to a twitter thread where a Windows user with a powerful machine was hitting random hangs in explorer. The first thing I noticed was that the UI Delays graph showed that, as promised, explorer.exe’s thread 7,888 was failing to check for messages for 20.531 seconds. It was hung.

Monitoring 141

Monitoring Testing Code Servers 141

Percona

FEBRUARY 2, 2023

These days, the typical PostgreSQL cluster consists not only of a multi-node replication cluster, which is ordinarily an asynchronous streaming replication model but can sometimes include a logical replication component.

Games 85

Games Open Source Tuning Speed 85

Percona

MARCH 23, 2023

innodb_autoinc_lock_mode (Static) – Setting the value to ‘2’ (interleaved mode) can remove the need for an auto-inc lock (at the table level) and can increase performance when using multi-row insert statements to insert values into a table with an auto-increment primary key. for more information on configuration.

Performance 123

Performance Hardware Tuning Storage 123

The Netflix TechBlog

MARCH 6, 2019

MezzFS exposes multi-terabyte objects without requiring any disk space. If we used the maximum allowed buffer size for each thread, our buffers would consume too much memory). So when the calculated buffer size is large, we divide the buffer into separate requests and parallelize them across multiple threads.

Media 214

Media Storage Processing Cache 214

Scalegrid

JUNE 4, 2020

Number of Threads. Multi-Region Replication. Here is the configuration we used for the ScaleGrid and DigitalOcean benchmark performance tests highlighted above: Configuration. Benchmark Tool. PostgreSQL Version. Scaling Factor. Query Mode. Number of Clients. 1,800 seconds. synchronous_commit. Supported PostgreSQL Versions. Coming soon.

Database 230

Database Latency Benchmarking Performance 230

Alex Russell

DECEMBER 18, 2022

Think (best-case) 2-core, 4-thread married to slow, spinning rust. It featured poor single and multi-core performance, and the high-end experience has continued to pull away from it since: Tap for a larger version. To understand our P75 device, we must imagine what the ASP device was at the P75 age. No, it was a $600-$700 device.

Performance 113

Performance Network Mobile Latency 113

Alex Russell

MARCH 6, 2021

Devices and networks have evolved too: Alex Russell @slightlylate An update on mobile CPUs and the Performance Inequality Gap: Mid-tier Android devices (~$300) now get the single-core performance of a 2014 iPhone and the multi-core perf of a 2015 iPhone. The cheapest (high volume) Androids perform like 2012/2013 iPhones, respectively.

Performance 124

Performance Network Cache Metrics 124

HammerDB

FEBRUARY 25, 2021

All the databases that HammerDB tests implement a form of MVCC (multi-version concurrency control). On high-performance multi-core systems all the supported databases can return performance in the many millions of transactions per minute. HammerDB is a load testing and benchmarking application for relational databases. The Python GIL.

Programming 67

Programming Benchmarking Virtualization C++ 67

Testsigma

JUNE 10, 2021

2 Factor Authentication is a subset of the multi factor authentication service that we see mainly in FinTech Apps. While 2 Factor authentication may have some vulnerabilities, using a multi factor authentication system like the above will result in users fleeing your application in pursuit of simpler systems. Introduction.

FinTech 140

FinTech Mobile Speed Testing 140

The Morning Paper

SEPTEMBER 27, 2020

PARSEC is a set of benchmarks for multi-threaded programs. MOOSE is a parallel finite element framework for mechanics, phase-field, Navier-Stokes, and heat conduction problems. WRF is a weather forecasting tool. ENZO is an astrophysics and hydrodynamics simulator. GROMACS is a molecular dynamics application. lines of code.

Benchmarking 101

Benchmarking Hardware Programming Code 101

Percona

AUGUST 18, 2023

That said, other performance motivations mentioned above did play into it, especially before the days of multi-threaded replication. There were other exceptions, too, like abnormally large special-case-shard needing dedicated machines. er tail: cannot open ‘/data/mysql/prod3306.er’

Programming 82

Programming Servers Database Hardware 82

Scalegrid

FEBRUARY 7, 2019

Multi-key operations are supported on Redis Clusters as long as all the keys involved in a single command execution belong to the same hash slot. Limited Multi-Key Operation Support. As mentioned in the previous section, multi-key operations are supported only when all the keys in a single operation belong to the same slot.

Java 138

Java Database Availability AWS 138

Dynatrace

APRIL 21, 2021

FID issues are mostly caused by heavy JavaScript execution and to reduce delays, Connett recommends: Minimizing main thread work. Multi-dimensional analysis — Analyze CWV over time by key dimensions, properties, and values. For websites, the ideal FID is less than 100 milliseconds. Keeping request counts low. In a word, everywhere.

Metrics 134

Metrics Google Website Speed 134

Randon ASCII

AUGUST 23, 2018

As I said last time: This is because Windows locks are, by design, not fair and if a thread releases a lock and then tries to reacquire it immediately then it can, in cases like this, reacquire it every single time. A fair lock means that two threads fighting over a lock will alternate, with each making progress.

Operating System 58

Operating System Code Processing Systems 58

Adrian Cockcroft

MAY 23, 2022

One of those trends was parallel and multi-threaded processing, and I led our early use of the Inmos Transputer and Occam language on some projects, including spinning off a startup called Niche Technology so that we could do development work for them.

C++ 98

C++ Software Engineering Education Engineering 98

The Morning Paper

NOVEMBER 15, 2020

So while scale out has seen the majority of attention in the cloud era, it’s good to remind ourselves periodically just what we really can do on a single box or even a single thread. The biggest fraction of CPU time in Snort is spent in the Multi-String Pattern Matcher (MSPM) module, which is used for header and partial string matching.

Servers 128

Servers Hardware Latency Design 128