Welcome!

Weblogic Authors: Yeshim Deniz, Elizabeth White, Michael Meiner, Michael Bushong, Avi Rosenthal

Related Topics: Weblogic, Java IoT

Weblogic: Article

Approaches to Performance Testing

A best-practices approach to maximize your performance test effort

Now comes the part where you actually run your capacity-planning test. The next question is, "How do I load the users to simulate the load?" The best way to do this is to try to emulate how users hit the server during peak hours. Does that user load happen gradually over a period of time? If so, a ramp-up-style load should be used, where x number of users are added ever y seconds. Or, do all of the users hit the system in a very short period of time all at once? If that is the case, a flat run should be used, where all of the users are simultaneously loaded onto the server. These different styles will produce different results that are not comparable. For instance, if a ramp-up run (Figure 5) is done and you find out that the system can support 5,000 users with a response time of 4 seconds or less, and then you follow that test with a flat run with 5,000 users, you'll probably find that the average response time of the system with 5,000 users is higher than 4 seconds. This is an inherent inaccuracy in ramp-up runs that prevents them from pinpointing the exact number of concurrent users that a system can support. For a portal application, for example, this inaccuracy is amplified as the size of the portal grows and as the size of the cluster is increased.

This is not to say that ramp-up tests should not be used. Ramp-up runs are great if the load on the system is slowly increased over a long period of time. This is because the system will be able to continually adjust over time. If a fast ramp-up is used, the system will lag and artificially report a lower response time than what would be seen if a similar number of users were being loaded during a flat run. So, what is the best way to determine capacity? Taking the best of both load types and running a series of tests will yield the best results. For example, using a ramp-up run to determine the range of users that the system can support should be used first. Then, once that range has been determined, doing a series of flat runs at various concurrent user loads within that range can be used to more accurately determine the capacity of the system (Figure 6).

Soak Tests
A soak test is a straightforward type of performance test. Soak tests are long-duration tests with a static number of concurrent users that test the overall robustness of the system. These tests will show any performance degradations over time via memory leaks, increased garbage collection (GC), or other problems in the system. The longer the test, the more confidence in the system you will have. It is a good idea to run this test twice - once with a fairly moderate user load (but below capacity so that there is no execute queue - Figure 7), and once with a high user load (so that there is a positive execute queue - Figure 8).

These tests should be run for several days to really get a good idea of the long-term health of the application. Make sure that the application being tested is as close to real world as possible with a realistic user scenario (how the virtual users navigate through the application), testing all of the features of the application. Ensure that all the necessary monitoring tools are running so that problems will be accurately detected and tracked down later (Figure 9).

Peak-Rest Tests
Peak-rest tests are a hybrid of the capacity-planning ramp-up-style tests and soak tests. The goal here is to determine how well the system recovers from a high load (such as one during peak hours of the system), goes back to near idle, and then goes back up to peak load and back down again.

The best way to implement this test is to do a series of quick ramp-up tests followed by a plateau (determined by the business requirements), and then a dropping off of the load. A pause in the system should then be used, followed by another quick ramp-up - then you repeat the process. A couple of things can be determined from this: Does the system recover on the second "peak" and each subsequent peak to the same level (or greater) than the first peak? And does the system show any signs of memory or GC degradation over the course of the test? The longer this test is run (repeating the peak/idle cycle over and over), the better idea you'll have of what the long-term health of the system looks like.

Summary
This article has described several approaches to performance testing. Depending on the business requirements, development cycle, and life cycle of the application, some tests will be better suited than others for a given organization. In all cases though, you should ask some fundamental questions before going down one path or another. The answers to these questions will then determine how to best test the application. These questions are:

  • How repeatable do the results need to be?
  • How many times do you want to run and rerun these tests?
  • What stage of the development cycle are you in?
  • What are your business requirements?
  • What are your user requirements?
  • How long do you expect the live production system to stay up between maintenance downtimes?
  • What is the expected user load during an average business day?
By answering these questions and then seeing how the answers fit into the aforementioned performance test types, you should be able to come up with a solid plan for testing the overall performance of your application.

More Stories By Matt Maccaux

Matt Maccaux is a performance engineer on WebLogic Portal at BEA.

Comments (3) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Deepak Batra 04/26/06 09:08:56 PM EDT

Great article by Matt. It definitely explains the process of WebLogic Performance Tuning & Testing well.

Arcturus (www.arcturustech.com) can help make the process of WebLogic Performance Tuning easy. AutoPilot WL, our flagship product completely automates WebLogic tuning process.

AutoPilot uses a wizard based approach, it takes a load script, generates load and monitors j2ee application & WebLogic's behavior (including transactions, WebLogic threads, ejbs, jms, jdbc, various pools and a lot more..). In the process, AutoPilot analyzes WebLogic & application's cumulative behavior after each run and makes appropriate adjustments to get the optimum performance. AutoPilot also automatically bounces WebLogic server as and when needed in the process. AutoPilot continues this process unless desired goals are achieved or certain user defined thresholds are reached. WebLogic tuning is in a way a misnomer, it is actually aligning WebLogic as per your application and environment's requirements. You can download an evaluation version of AutoPilot at the following url and try it for yourself.

http://support.arcturustech.com/downloadpage.do

You can get more details on WebLogic Performance Tuning Process using AutoPilot at the following URL.

http://support.arcturustech.com/AutoPilot_WL_Help/Tuning_Your_WebLogic_S...

It is recommended by Arcturus to use AutoPilot Advisor before tuning. Advisor analyzes complete application environment for any configuration related issues using its in built knowledge and gives recommendations. It is like attaching your WebLogic environment to a computer that runs a 1000 point inspection on it and either fixes issues or advises how to fix them. Advisor is a great way to find out where there is room for improvement even before you get into Performance Testing & Tuning. It even guides with the relevant BEA CRs that can save an outage situation. We recommend CRs based on their applicability (not blindly).

We also understand no matter how much effort one puts into an application, we are bound to find apllication/weblogic issues that cause WebLogic server to hang. AutoPilot Detector and Blackbox handle those situations and provide you with an instant root cause report. Feel free to drop me an email (deepak@arcturustech.com) if you any questions at all.

Deepak Batra 04/26/06 09:08:21 PM EDT

Great article by Matt. It definitely explains the process of WebLogic Performance Tuning & Testing well.

Arcturus (www.arcturustech.com) can help make the process of WebLogic Performance Tuning easy. AutoPilot WL, our flagship product completely automates WebLogic tuning process.

AutoPilot uses a wizard based approach, it takes a load script, generates load and monitors j2ee application & WebLogic's behavior (including transactions, WebLogic threads, ejbs, jms, jdbc, various pools and a lot more..). In the process, AutoPilot analyzes WebLogic & application's cumulative behavior after each run and makes appropriate adjustments to get the optimum performance. AutoPilot also automatically bounces WebLogic server as and when needed in the process. AutoPilot continues this process unless desired goals are achieved or certain user defined thresholds are reached. WebLogic tuning is in a way a misnomer, it is actually aligning WebLogic as per your application and environment's requirements. You can download an evaluation version of AutoPilot at the following url and try it for yourself.

http://support.arcturustech.com/downloadpage.do

You can get more details on WebLogic Performance Tuning Process using AutoPilot at the following URL.

http://support.arcturustech.com/AutoPilot_WL_Help/Tuning_Your_WebLogic_S...

It is recommended by Arcturus to use AutoPilot Advisor before tuning. Advisor analyzes complete application environment for any configuration related issues using its in built knowledge and gives recommendations. It is like attaching your WebLogic environment to a computer that runs a 1000 point inspection on it and either fixes issues or advises how to fix them. Advisor is a great way to find out where there is room for improvement even before you get into Performance Testing & Tuning. It even guides with the relevant BEA CRs that can save an outage situation. We recommend CRs based on their applicability (not blindly).

We also understand no matter how much effort one puts into an application, we are bound to find apllication/weblogic issues that cause WebLogic server to hang. AutoPilot Detector and Blackbox handle those situations and provide you with an instant root cause report. Feel free to drop me an email (deepak@arcturustech.com) if you any questions at all.

news desk 02/18/06 03:08:31 PM EST

Performance testing a J2EE application can be a daunting and seemingly confusing task if you don't approach it with the proper plan in place. As with any software development process, you must gather requirements, understand the business needs, and lay out a formal schedule well in advance of the actual testing.

@ThingsExpo Stories
No hype cycles or predictions of a gazillion things here. IoT is here. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, an Associate Partner of Analytics, IoT & Cybersecurity at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He also discussed the evaluation of communication standards and IoT messaging protocols, data...
The 22nd International Cloud Expo | 1st DXWorld Expo has announced that its Call for Papers is open. Cloud Expo | DXWorld Expo, to be held June 5-7, 2018, at the Javits Center in New York, NY, brings together Cloud Computing, Digital Transformation, Big Data, Internet of Things, DevOps, Machine Learning and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding busin...
Smart cities have the potential to change our lives at so many levels for citizens: less pollution, reduced parking obstacles, better health, education and more energy savings. Real-time data streaming and the Internet of Things (IoT) possess the power to turn this vision into a reality. However, most organizations today are building their data infrastructure to focus solely on addressing immediate business needs vs. a platform capable of quickly adapting emerging technologies to address future ...
Nordstrom is transforming the way that they do business and the cloud is the key to enabling speed and hyper personalized customer experiences. In his session at 21st Cloud Expo, Ken Schow, VP of Engineering at Nordstrom, discussed some of the key learnings and common pitfalls of large enterprises moving to the cloud. This includes strategies around choosing a cloud provider(s), architecture, and lessons learned. In addition, he covered some of the best practices for structured team migration an...
With tough new regulations coming to Europe on data privacy in May 2018, Calligo will explain why in reality the effect is global and transforms how you consider critical data. EU GDPR fundamentally rewrites the rules for cloud, Big Data and IoT. In his session at 21st Cloud Expo, Adam Ryan, Vice President and General Manager EMEA at Calligo, examined the regulations and provided insight on how it affects technology, challenges the established rules and will usher in new levels of diligence arou...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
In his session at 21st Cloud Expo, Raju Shreewastava, founder of Big Data Trunk, provided a fun and simple way to introduce Machine Leaning to anyone and everyone. He solved a machine learning problem and demonstrated an easy way to be able to do machine learning without even coding. Raju Shreewastava is the founder of Big Data Trunk (www.BigDataTrunk.com), a Big Data Training and consulting firm with offices in the United States. He previously led the data warehouse/business intelligence and B...
Recently, REAN Cloud built a digital concierge for a North Carolina hospital that had observed that most patient call button questions were repetitive. In addition, the paper-based process used to measure patient health metrics was laborious, not in real-time and sometimes error-prone. In their session at 21st Cloud Expo, Sean Finnerty, Executive Director, Practice Lead, Health Care & Life Science at REAN Cloud, and Dr. S.P.T. Krishnan, Principal Architect at REAN Cloud, discussed how they built...
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
DevOps at Cloud Expo – being held June 5-7, 2018, at the Javits Center in New York, NY – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real results. Among the proven benefits,...
@DevOpsSummit at Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, is co-located with 22nd Cloud Expo | 1st DXWorld Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to wait...
Cloud Expo | DXWorld Expo have announced the conference tracks for Cloud Expo 2018. Cloud Expo will be held June 5-7, 2018, at the Javits Center in New York City, and November 6-8, 2018, at the Santa Clara Convention Center, Santa Clara, CA. Digital Transformation (DX) is a major focus with the introduction of DX Expo within the program. Successful transformation requires a laser focus on being data-driven and on using all the tools available that enable transformation if they plan to survive ov...
SYS-CON Events announced today that T-Mobile exhibited at SYS-CON's 20th International Cloud Expo®, which will take place on June 6-8, 2017, at the Javits Center in New York City, NY. As America's Un-carrier, T-Mobile US, Inc., is redefining the way consumers and businesses buy wireless services through leading product and service innovation. The Company's advanced nationwide 4G LTE network delivers outstanding wireless experiences to 67.4 million customers who are unwilling to compromise on qua...
SYS-CON Events announced today that Cedexis will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Cedexis is the leader in data-driven enterprise global traffic management. Whether optimizing traffic through datacenters, clouds, CDNs, or any combination, Cedexis solutions drive quality and cost-effectiveness. For more information, please visit https://www.cedexis.com.
SYS-CON Events announced today that Google Cloud has been named “Keynote Sponsor” of SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Companies come to Google Cloud to transform their businesses. Google Cloud’s comprehensive portfolio – from infrastructure to apps to devices – helps enterprises innovate faster, scale smarter, stay secure, and do more with data than ever before.
SYS-CON Events announced today that Vivint to exhibit at SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California. As a leading smart home technology provider, Vivint offers home security, energy management, home automation, local cloud storage, and high-speed Internet solutions to more than one million customers throughout the United States and Canada. The end result is a smart home solution that sav...
SYS-CON Events announced today that Opsani will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Opsani is the leading provider of deployment automation systems for running and scaling traditional enterprise applications on container infrastructure.
SYS-CON Events announced today that Nirmata will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Nirmata provides a comprehensive platform, for deploying, operating, and optimizing containerized applications across clouds, powered by Kubernetes. Nirmata empowers enterprise DevOps teams by fully automating the complex operations and management of application containers and its underlying ...
SYS-CON Events announced today that Opsani to exhibit at SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California. Opsani is creating the next generation of automated continuous deployment tools designed specifically for containers. How is continuous deployment different from continuous integration and continuous delivery? CI/CD tools provide build and test. Continuous Deployment is the means by which...