Dynatrace

MAY 17, 2023

The other sections on that page (such as Disk analysis) provide further information and charts on topics such as available disk space, latency, dropped network packets, refused connections, and more. Performance analysis covers the technical aspects of the service, such as error rates, geo-locations, XHR actions, and user-bot ratio.

Metrics 178

Metrics Database Monitoring Network 178

Dynatrace

JULY 18, 2023

Dynatrace provides automation for detecting problems, and you can opt to automatically run a change-impact analysis report to proactively validate important objectives. Stay tuned for more examples and easy-to-adopt automations provided in our public Github project. You can read all about it in our Configuration as Code documentation.

Best Practices 198

Best Practices Code Infrastructure Latency 198

Dynatrace

JULY 24, 2023

It enables them to adapt to user feedback swiftly, fine-tune feature releases, and deliver exceptional user experiences, all while maintaining control and minimizing disruption. Change impact analysis is an indispensable process for effectively managing changes within an organization’s infrastructure and applications.

DevOps 227

DevOps Traffic Efficiency Servers 227

Dynatrace

SEPTEMBER 23, 2020

Storage mount points in a system might be larger or smaller, local or remote, with high or low latency, and various speeds. For example: All subfolders of the /opt directory are mounted as local, low latency, high-throughput drives, with relatively low storage capacity. Stay tuned for upcoming news about these changes.

Storage 151

Storage Latency Operating System Network 151

Dynatrace

MAY 5, 2021

Keptn closes the loop of planning, testing, deployment, and analysis in Agile-like environments with the help of quality gates defined by service- and business-level indicators. For example, improving latency by as little as 0.1 latency is the number one reason consumers abandon mobile sites. Meanwhile, in the U.S.,

Benchmarking 190

Benchmarking Latency Speed Software 190

Dynatrace

APRIL 26, 2022

STM generates traffic that replicates the typical path or behavior of a user on a network to measure performance for example, response times, availability, packet loss, latency, jitter, and other variables). One use case for STM is to model the behavior of a customer in the form of a flow of transactions along the buyer’s journey.

Monitoring 212

Monitoring Social Media IoT Metrics 212

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This was a weird problem to think about: Time itself had now become a resource and target of performance analysis. I'm including this step as a reminder for anyone following this kind of analysis.

Speed 126

Speed Java AWS Virtualization 126

Dynatrace

DECEMBER 2, 2021

You can set SLOs based on individual indicators, such as batch throughput, request latency, and failures-per-second. Gathering and analyzing metrics over time will help you determine the overall effectiveness of your SLOs so you can tune them as your processes mature and improve. SLO best practices. Automate SLO evaluation.

Metrics 199

Metrics Best Practices DevOps Infrastructure 199

Brendan Gregg

JUNE 30, 2018

A co-worker introduced me to Craig Hanson and Pat Crain's performance mantras, which neatly summarize much of what we do in performance analysis and tuning. Answering this usually requires analysis using other observability tools while the benchmark is running (what I call "[active benchmarking]"). ### 2. Don't do it.

Benchmarking 54

Benchmarking Latency Cache Network 54

IO River

NOVEMBER 15, 2023

Two of them are particularly gnarly: fine-tuning rules to perfection and managing a WAF over a multi-CDN architecture. Aggregating this data into a single, coherent view for analysis becomes an additional hurdle. Benchmarks should be established to measure the latency introduced by the WAF, ensuring it stays within acceptable limits.‍Conclusion‍In

Traffic 52

Traffic Network Logistics Architecture 52

The Morning Paper

JULY 7, 2019

In addition to availability, our respondents focus most heavily on supporting the following data attributes: “accessibility, accuracy, authoritativeness, freshness, latency, structuredness, ontological typing, connectedness, and semantic joinability.” To address this, rigorous rollout processes are required.

Software Engineering 92

Software Engineering Engineering Software Software 92

Brendan Gregg

JUNE 29, 2018

A co-worker introduced me to Craig Hanson and Pat Crain's performance mantras, which neatly summarize much of what we do in performance analysis and tuning. Answering this usually requires analysis using other observability tools while the benchmark is running (what I call "[active benchmarking]"). ### 2. Don't do it.

Benchmarking 40

Benchmarking Latency Cache Network 40

The Morning Paper

MAY 21, 2019

This boils down to a single digit µs latency toleration in the tail for far memory, and in addition to security and privacy concerns, rules out remote memory solutions. Thus we’re fundamentally trading (de)-compression latency at access time for the ability to pack more data in memory. ML-based auto-tuning. Evaluation.

Software 78

Software Software Google Hardware 78

IO River

NOVEMBER 2, 2023

Two of them are particularly gnarly: fine-tuning rules to perfection and managing a WAF over a multi-CDN architecture. Aggregating this data into a single, coherent view for analysis becomes an additional hurdle. Let's dive deep into these challenges.‍1. You'll have logs and analytics scattered across different CDNs.

Traffic 40

Traffic Network Logistics Architecture 40

Brendan Gregg

SEPTEMBER 25, 2021

A Cassandra database cluster had switched to Ubuntu and noticed write latency increased by over 30%. This was a weird problem to think about: Time itself had now become a resource and target of performance analysis. I'm including this step as a reminder for anyone following this kind of analysis.

Speed 40

Speed Java AWS Virtualization 40

Brendan Gregg

OCTOBER 8, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. It makes off-CPU analysis effective, which is the counterpart to CPU analysis. It's shaping up to be a DTrace version 2.0:

C++ 110

C++ Virtualization Programming Latency 110

Brendan Gregg

MAY 16, 2017

Most of my day is a 50/50 mixture of proactive projects, and reactive performance analysis. The proactive projects usually take weeks or months, and are where I'm developing a new technology or helping other teams with performance analysis or evaluations. Java core dump analysis for a crashing JVM. - or at least try to!

Java 75

Java Entertainment Engineering Scalability 75

O'Reilly Software

APRIL 4, 2018

Those were the days when “connected” meant having some web presence, “interactions” were measured in number of clicks, and the analysis happened in batch overnight processes. The data shape will dictate capacity planning, tuning of the backbone, and scalability analysis for individual components. At least once? At most once?

Architecture 80

Architecture Scalability Google Operating System 80

The Netflix TechBlog

JUNE 13, 2023

By collecting and analyzing key performance metrics of the service over time, we can assess the impact of the new changes and determine if they meet the availability, latency, and performance requirements. They enable us to further fine-tune and configure the system, ensuring the new changes are integrated smoothly and seamlessly.

Traffic 279

Traffic Metrics Systems Strategy 279

The Morning Paper

MARCH 10, 2020

The tracing, replay, and analysis tools developed for this work are released in open source as part of the latest RocksDB release , and the new benchmark is now part of the db_bench benchmarking tool. YCSB lets you tune the query type ratio, KV-pair hotness distribution, and value size distribution. Does that matter?

Benchmarking 59

Benchmarking Storage Cache Open Source 59

The Netflix TechBlog

JANUARY 10, 2024

This architecture shift greatly reduced the processing latency and increased system resiliency. We expanded pipeline support to serve our studio/content-development use cases, which had different latency and resiliency requirements as compared to the traditional streaming use case. divide the input video into small chunks 2.

Processing 229

Processing Media Latency Innovation 229

John McCalpin

JANUARY 22, 2018

Each of the two vector units can issue one FMA instruction per cycle, assuming that there are enough independent accumulators to tolerate the 6-cycle dependent-operation latency. of the “adjusted peak performance”, there is no longer a significant upside to performance tuning. vfmadd213pd %zmm16, %zmm17, %zmm26.

Latency 40

Latency Hardware Code Testing 40

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. Wait time: Sometimes called average latency, wait time refers the amount of time a request spends in a queue before it gets processed. What is Performance Testing?

Testing Tools 55

Testing Tools Best Practices Performance Testing Testing 55

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. Both Xen and KVM have had many performance and security improvements, and workloads can now be tuned to run at almost bare metal speeds (say, a 3% loss or less). Hit Ctrl-C to end. ^C

Virtualization 76

Virtualization AWS Engineering Hardware 76

Brendan Gregg

OCTOBER 7, 2018

Screenshot: tracing read latency for PID 181: # bpftrace -e 'kprobe:vfs_read /pid == 30153/ { @start[tid] = nsecs; } kretprobe:vfs_read /@start[tid]/ { @ns = hist(nsecs - @start[tid]); delete(@start[tid]); }'. It makes off-CPU analysis effective, which is the counterpart to CPU analysis. It's shaping up to be a DTrace version 2.0:

C++ 40

C++ Virtualization Programming Latency 40

The Netflix TechBlog

SEPTEMBER 24, 2021

Uploading and downloading data always come with a penalty, namely latency. Figure 3: Video Processing with Index and Virtual Assembly Using virtual assembly greatly improves the latency performance of the ProRes 422 HQ proxy generation by removing one round trip of cloud downloading and cloud uploading by the physical assembler.

Cloud 237

Cloud Media Storage Cache 237

The Netflix TechBlog

AUGUST 13, 2020

You’re half awake and wondering, “Is there really a problem or is this just an alert that needs tuning? Telltale learns what constitutes typical health for an application, no alert tuning required. For example, a latency increase is less critical than error rate increase and some error codes are less critical than others.

Monitoring 210

Monitoring Tuning Traffic Metrics 210

The Netflix TechBlog

JULY 21, 2022

With large data, comes the opportunity to leverage the data for predictive and classification based analysis. We also highlight steps and guidelines for exploratory analysis and prediction to understand Out of Memory kills on a sample set of devices. Restricting Testing and Analysis to one day and device at a time.

Big Data 179

Big Data Cache Engineering Data Engineering 179

The Netflix TechBlog

JULY 26, 2021

Operational Reporting is a reporting paradigm specialized in covering high-resolution, low-latency data sets, serving detailed day-to-day activities¹ and processes of a business domain. Most of the business views created on top of the Iceberg tables can tolerate a few minutes of latency. Please stay tuned! Dehghani, Zhamak.

Big Data 253

Big Data Government Analytics Processing 253

The Netflix TechBlog

NOVEMBER 2, 2021

This enables us to use our scale to increase throughput and reduce latencies. Here, based on the video length, the throughput and latency requirements, available scale etc., Stay tuned for more details on these algorithmic innovations. VQS is called using the measureQuality endpoint. The workflow is initiated.

Media 171

Media Innovation Metrics Latency 171

The Netflix TechBlog

FEBRUARY 18, 2022

This separation allows us to tune system configuration and scaling policies independently for different event priorities and traffic patterns. Furthermore, in addition to real-time alerting, we added trend analysis for important metrics to help catch longer term degradations.

Systems 334

Systems Traffic Architecture Mobile 334

All Things Distributed

APRIL 9, 2015

The Amazon ML console and API provide data and model visualization tools, as well as wizards to guide you through the process of creating machine learning models, measuring their quality and fine-tuning the predictions to match your application requirements.

Lambda 123

Lambda Cloud IoT AWS 123