Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This server is spending about a third of its CPU cycles just checking the time! Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? 30.14% in the middle of the flame graph.

Speed 126

Speed Java AWS Virtualization 126

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. What is Performance Testing? Peak response time: The longest response time.

Testing Tools 55

Testing Tools Best Practices Performance Testing Testing 55

Percona

MARCH 23, 2023

Hardware Memory The amount of RAM to be provisioned for database servers can vary greatly depending on the size of the database and the specific requirements of the company. Some servers may need a few GBs of RAM, while others may need hundreds of GBs or even terabytes of RAM. If you see concurrency issues, you can tune this variable.

Performance 128

Performance Hardware Tuning Storage 128

Dynatrace

MAY 17, 2023

Think about items such as general system metrics (for example, CPU utilization, free memory, number of services), the connectivity status, details of our web server, or even more granular in-application tasks like database queries. Let’s click “Apache Web Server apache” now.

Metrics 171

Metrics Monitoring Database Network 171

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This server is spending about a third of its CPU cycles just checking the time! Measuring the speed of time Is there already a microbenchmark for os::javaTimeMillis()? 30.14% in the middle of the flame graph.

Speed 40

Speed Java AWS Virtualization 40

IO River

NOVEMBER 2, 2023

While it can occasionally be a specific server or even an application within a data center, it's predominantly the data center itself. If the content is readily available, the CDN delivers it straight away, negating the need to retrieve it from the origin server. Do you just give up the traffic trying to access it while you work on it?

Traffic 52

Traffic Cache Servers Latency 52

Smashing Magazine

AUGUST 22, 2021

A Primer on Speed. Discussing performance and “speed” can quickly get complex, because many underlying aspects contribute to a web-page loading “slowly”. Because we are dealing with network protocols here, we will mainly look at network aspects, of which two are most important: latency and bandwidth. Congestion Control.

Performance 105

Performance Network Latency Servers 105

IO River

NOVEMBER 2, 2023

While it can occasionally be a specific server or even an application within a data center, it's predominantly the data center itself. If the content is readily available, the CDN delivers it straight away, negating the need to retrieve it from the origin server. Do you just give up the traffic trying to access it while you work on it?

Traffic 40

Traffic Cache Network Servers 40

KeyCDN

MARCH 10, 2021

With Tel Aviv being the technology capital of Israel, it's the ideal edge server location. The image below shows a significant drop in latency once we've launched the new point of presence in Israel. In fact, latency has been reduced by almost 50%! Compared to other countries in the region, the connection speed has room to grow.

Latency 110

Latency Internet Internet Tuning 110

SQL Server According to Bob

JANUARY 11, 2020

Microsoft SQL Server I/O Basics Author: ​​ Bob Dorr, Microsoft SQL Server Escalation Published: ​​ December, 2004 SUMMARY: ​​ Learn the I/O requirements for Microsoft SQL Server database file operations. This will help you increase system performance and avoid I/O environment errors.

Servers 40

Servers Cache Media Hardware 40

SQL Performance

APRIL 27, 2020

Many of the newer features we have in SQL Server were initially launched in Azure SQL Database, including (but not limited to) Always Encrypted, Dynamic Data Masking, Row Level Security, and Query Store. There is a lot of awesome technology involved with Hyperscale in how it is architected to use SSD-based caches and page servers.

Azure 55

Azure Database Serverless Hardware 55

SQL Server According to Bob

JANUARY 11, 2020

Microsoft, ​​ Windows, ​​ Windows NT, ​​ and Windows Server ​​ are registered trademarks of Microsoft Corporation in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

Servers 40

Servers Cache Database Media 40

All Things Distributed

OCTOBER 2, 2017

percent availability in the event of a server, a rack of servers, or an Availability Zone failure. DynamoDB automatically re-distributes your data to healthy servers to ensure there are always multiple replicas of your data without you needing to intervene.

Internet 128

Internet Internet AWS Performance 128

Smashing Magazine

SEPTEMBER 6, 2021

Next, we’ll look at how to set up servers and clients (that’s the hard part unless you’re using a content delivery network (CDN)). This difference by itself doesn’t do all that much (it mainly reduces the overhead on the server-side), but it leads to most of the following points. Server Sharding and Connection Coalescing.

Network 104

Network Servers Cache Traffic 104

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. Oracle VM Server is based on Xen. Many new tools can now be written, and the main toolkit we're working on is [bcc]. Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

HammerDB

OCTOBER 12, 2018

Historically MySQL has been positioned for supporting web-based applications this is in contrast to enterprise based database workloads that have been served by commercial databases such as Oracle, Db2 and SQL Server. maximum transition latency: Cannot determine or is not supported. . hardware limits: 1000 MHz - 3.80 perf special.

Best Practices 40

Best Practices Scalability Performance C++ 40

Percona

NOVEMBER 3, 2023

PostgreSQL Cluster One coordinator node citus-coord-01 Three worker nodes citus1 citus2 citus3 Hardware AWS Instance Ubuntu Server 20.04, SSD volume type 64-bit (x86) c5.xlarge In order to speed up the benchmark indexes must be added. Steps Provisioning The first step is to provision the four nodes with both PostgreSQL and Citus.

Database 109

Database Benchmarking Latency C++ 109

Smashing Magazine

SEPTEMBER 29, 2021

Assuming encode/decode speeds meet your needs. Encode/Decode Speed. Degree of compression, image quality, and decoding speed are key factors to be considered when comparing image performance for the web. A tl;dr of recommendations can be found below. A complex decoding process can slow down the rendering of images.

Open Source 144

Open Source Speed Website Google 144