Welcome!

SDN Journal Authors: John Walsh, Elizabeth White, Liz McMillan, Sven Olav Lund, Simon Hill

Related Topics: @DevOpsSummit, Microservices Expo, Containers Expo Blog

@DevOpsSummit: Blog Feed Post

Trend Shift Analysis | @DevOpsSummit #DevOps #APM #Monitoring

In performance monitoring, trend, or trend shift, is a key metric that is used to indicate change

Trend Shift Analysis
By Pradeep Thalanki and Ankur Vishwakarma

‘Trend’ is a pretty common business term, but its definition tends to vary by industry. In performance monitoring, trend, or trend shift, is a key metric that is used to indicate change.

Why is trend shift important?
Change is inevitable. Today’s websites must frequently update and change to keep up with competition and attract new users, but such changes can have a negative impact on the user experience if not managed properly. The dynamic nature of the Internet makes it necessary to constantly monitor different metrics. One of the biggest challenges in performance monitoring the lack of clarity when configuring alerts. Alerts that are set up using the wrong configuration can lead to an overabundance of false positive alerts or no alerts at all, which results in an increased MTTR.

Webpage response is an important metric that affects end-user experience. If the page takes too long to load, the user gets frustrated and will likely abandon the webpage. A high page load time can be caused by several issues, some of the common problems are:

  1. The server that delivers the page content is unable to handle a surge in requests
  2. The webpage has too many third-party ads/images
  3. The network is sluggish due to maintenance

Monitoring webpage response values or keeping track of the trend shift can help identify any unusual webpage behavior and to ensure a positive user experience.

This is just one of the many scenarios where analyzing trend shift can be valuable. Trend shift alerts are also useful in:

  • Detecting trend shifts on specific ISP or region or city
  • Multi hosting or multi CDN environment

When can you use trend shift?
Trend shift alerts can be set up for metrics that are prone to constant variations in their values. In the image below, a trend shift was detected on July 18 at around 16:00, which continued for about 24 hours. Later, it returned to normal, indicating that the root cause was identified and fixed.

When is trend shift irrelevant?
Trend shift can be detected when there is a sudden change (for a few consecutive runs) in the usual pattern. But if this change is gradual rather than sudden, then trend shift cannot detect the problem. In such cases, warning and critical alerts should be set up for a specific value.

In the image below, we see that the webpage response has increased gradually. The webpage response is around 2500ms in the beginning and increased to around 3500ms over two days’ time. Trend shift alert is not triggered here as the value increased gradually.

Trend shift alerts using Catchpoint
Clients can configure trend shift alerts using Catchpoint; the alerts will help them take necessary action so that end-user experience is not affected.

Below is where you will find the trend shift alerts displayed:

  1. Smartboard page
  2. Alert Log page

Trend shift alerts in the Smartboard page
The assistant widget section in the Smartboard page displays trend shifts. The Smartboard page has been developed using artificial intelligence (intense computing algorithms) that detects the trend shifts. It computes the trend shift for the test time metric (total time taken to complete the test). The Smartboard page does not require any additional configuration to display the trend shift information.

Trend shift alerts in alerts Log
A trend shift alert is triggered and displayed in the alerts log page only after it has been configured in the test properties. Trend shifts can be detected for:

  1. Timing metrics – test time, DNS, send, wait, DOM load, etc.
  2. Ping metrics – ping packet loss, ping RTT
  3. Request metrics – #Requests, #Connections, #Redirects, #Images, #Scripts, #CSS, etc.
  4. Zone metrics – self downloaded bytes, %Self Bottleneck, %Third party bottleneck, etc.

Configuring trend shift alerts
Alerts can be set up in the advanced alerts section in the test properties page as shown below. The default recipients will be notified by an email when a trend shift is detected for the metric it was configured.

Where to find trend shift alerts?
The alerts log page displays a list of alerts; it can be filtered for specific tests and alert types (metric based) for a specified time interval.

How is Trend Shift alert different from other alert types?
For regular alerts, the user should configure the values over/below which an alert should be triggered. In the case of trend shift, however, the user should select the metric to be monitored for trend shift. Trend shift is based on historical comparison, therefore there is no need to set any specific values.

Advantages of trend shift analysis
Let’s take a real scenario where trend shift analysis can be critical. Ecommerce companies rake in major business during the annual sales like Black Friday and Cyber Monday. On such days, these websites experience a rapid hike in traffic with customers rushing in to grab the best deals. The servers managing the website may slow down considerably with the influx of requests. In the image below, we can see that the webpage response shot up during a special discount sale.

Trend shift detects such spikes in the webpage response and helps businesses identify the root cause of the issue. It can provide a lot of data around the incident such as:

  1. Identifying the city with the most number of users
  2. Identifying whether the ISP (Internet Service Provider) was capable of handling the load
  3. Building a better infrastructure so that the load is distributed

Summary
Trend shift signals a change in the website performance. It provides a starting point to analyze the change (increase/decrease) in the metric being monitored. Performance analysts can use this data to identify the root cause and take corrective measures if necessary. Proactively identifying and fixing the issue will improve the user experience and have a positive impact on the company’s revenue.

The post Trend Shift Analysis appeared first on Catchpoint's Blog - Web Performance Monitoring.

Read the original blog entry...

More Stories By Mehdi Daoudi

Catchpoint radically transforms the way businesses manage, monitor, and test the performance of online applications. Truly understand and improve user experience with clear visibility into complex, distributed online systems.

Founded in 2008 by four DoubleClick / Google executives with a passion for speed, reliability and overall better online experiences, Catchpoint has now become the most innovative provider of web performance testing and monitoring solutions. We are a team with expertise in designing, building, operating, scaling and monitoring highly transactional Internet services used by thousands of companies and impacting the experience of millions of users. Catchpoint is funded by top-tier venture capital firm, Battery Ventures, which has invested in category leaders such as Akamai, Omniture (Adobe Systems), Optimizely, Tealium, BazaarVoice, Marketo and many more.

@CloudExpo Stories
"Infoblox does DNS, DHCP and IP address management for not only enterprise networks but cloud networks as well. Customers are looking for a single platform that can extend not only in their private enterprise environment but private cloud, public cloud, tracking all the IP space and everything that is going on in that environment," explained Steve Salo, Principal Systems Engineer at Infoblox, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventio...
"Cloud Academy is an enterprise training platform for the cloud, specifically public clouds. We offer guided learning experiences on AWS, Azure, Google Cloud and all the surrounding methodologies and technologies that you need to know and your teams need to know in order to leverage the full benefits of the cloud," explained Alex Brower, VP of Marketing at Cloud Academy, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clar...
In his session at 21st Cloud Expo, Carl J. Levine, Senior Technical Evangelist for NS1, will objectively discuss how DNS is used to solve Digital Transformation challenges in large SaaS applications, CDNs, AdTech platforms, and other demanding use cases. Carl J. Levine is the Senior Technical Evangelist for NS1. A veteran of the Internet Infrastructure space, he has over a decade of experience with startups, networking protocols and Internet infrastructure, combined with the unique ability to it...
The question before companies today is not whether to become intelligent, it’s a question of how and how fast. The key is to adopt and deploy an intelligent application strategy while simultaneously preparing to scale that intelligence. In her session at 21st Cloud Expo, Sangeeta Chakraborty, Chief Customer Officer at Ayasdi, provided a tactical framework to become a truly intelligent enterprise, including how to identify the right applications for AI, how to build a Center of Excellence to oper...
"IBM is really all in on blockchain. We take a look at sort of the history of blockchain ledger technologies. It started out with bitcoin, Ethereum, and IBM evaluated these particular blockchain technologies and found they were anonymous and permissionless and that many companies were looking for permissioned blockchain," stated René Bostic, Technical VP of the IBM Cloud Unit in North America, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Conventi...
Gemini is Yahoo’s native and search advertising platform. To ensure the quality of a complex distributed system that spans multiple products and components and across various desktop websites and mobile app and web experiences – both Yahoo owned and operated and third-party syndication (supply), with complex interaction with more than a billion users and numerous advertisers globally (demand) – it becomes imperative to automate a set of end-to-end tests 24x7 to detect bugs and regression. In th...
In his session at 21st Cloud Expo, James Henry, Co-CEO/CTO of Calgary Scientific Inc., introduced you to the challenges, solutions and benefits of training AI systems to solve visual problems with an emphasis on improving AIs with continuous training in the field. He explored applications in several industries and discussed technologies that allow the deployment of advanced visualization solutions to the cloud.
Agile has finally jumped the technology shark, expanding outside the software world. Enterprises are now increasingly adopting Agile practices across their organizations in order to successfully navigate the disruptive waters that threaten to drown them. In our quest for establishing change as a core competency in our organizations, this business-centric notion of Agile is an essential component of Agile Digital Transformation. In the years since the publication of the Agile Manifesto, the conn...
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Large industrial manufacturing organizations are adopting the agile principles of cloud software companies. The industrial manufacturing development process has not scaled over time. Now that design CAD teams are geographically distributed, centralizing their work is key. With large multi-gigabyte projects, outdated tools have stifled industrial team agility, time-to-market milestones, and impacted P&L stakeholders.
"ZeroStack is a startup in Silicon Valley. We're solving a very interesting problem around bringing public cloud convenience with private cloud control for enterprises and mid-size companies," explained Kamesh Pemmaraju, VP of Product Management at ZeroStack, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Enterprises are adopting Kubernetes to accelerate the development and the delivery of cloud-native applications. However, sharing a Kubernetes cluster between members of the same team can be challenging. And, sharing clusters across multiple teams is even harder. Kubernetes offers several constructs to help implement segmentation and isolation. However, these primitives can be complex to understand and apply. As a result, it’s becoming common for enterprises to end up with several clusters. Thi...
"Space Monkey by Vivent Smart Home is a product that is a distributed cloud-based edge storage network. Vivent Smart Home, our parent company, is a smart home provider that places a lot of hard drives across homes in North America," explained JT Olds, Director of Engineering, and Brandon Crowfeather, Product Manager, at Vivint Smart Home, in this SYS-CON.tv interview at @ThingsExpo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
"Codigm is based on the cloud and we are here to explore marketing opportunities in America. Our mission is to make an ecosystem of the SW environment that anyone can understand, learn, teach, and develop the SW on the cloud," explained Sung Tae Ryu, CEO of Codigm, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
High-velocity engineering teams are applying not only continuous delivery processes, but also lessons in experimentation from established leaders like Amazon, Netflix, and Facebook. These companies have made experimentation a foundation for their release processes, allowing them to try out major feature releases and redesigns within smaller groups before making them broadly available. In his session at 21st Cloud Expo, Brian Lucas, Senior Staff Engineer at Optimizely, discussed how by using ne...
Vulnerability management is vital for large companies that need to secure containers across thousands of hosts, but many struggle to understand how exposed they are when they discover a new high security vulnerability. In his session at 21st Cloud Expo, John Morello, CTO of Twistlock, addressed this pressing concern by introducing the concept of the “Vulnerability Risk Tree API,” which brings all the data together in a simple REST endpoint, allowing companies to easily grasp the severity of the ...
While some developers care passionately about how data centers and clouds are architected, for most, it is only the end result that matters. To the majority of companies, technology exists to solve a business problem, and only delivers value when it is solving that problem. 2017 brings the mainstream adoption of containers for production workloads. In his session at 21st Cloud Expo, Ben McCormack, VP of Operations at Evernote, discussed how data centers of the future will be managed, how the p...
"NetApp is known as a data management leader but we do a lot more than just data management on-prem with the data centers of our customers. We're also big in the hybrid cloud," explained Wes Talbert, Principal Architect at NetApp, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Coca-Cola’s Google powered digital signage system lays the groundwork for a more valuable connection between Coke and its customers. Digital signs pair software with high-resolution displays so that a message can be changed instantly based on what the operator wants to communicate or sell. In their Day 3 Keynote at 21st Cloud Expo, Greg Chambers, Global Group Director, Digital Innovation, Coca-Cola, and Vidya Nagarajan, a Senior Product Manager at Google, discussed how from store operations and ...
"We're focused on how to get some of the attributes that you would expect from an Amazon, Azure, Google, and doing that on-prem. We believe today that you can actually get those types of things done with certain architectures available in the market today," explained Steve Conner, VP of Sales at Cloudistics, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.