Java IoT Authors: Andreas Grabner, Roger Strukhoff, Carmen Gonzalez, John Mertic, Ruxit Blog

Related Topics: Microsoft Cloud, Java IoT, Microservices Expo, IoT User Interface, Silverlight, @CloudExpo

Microsoft Cloud: Article

.NET and SharePoint Performance

Don’t let default settings ruin your end user experience

SharePoint is a popular choice for intranet applications and therefore it is important that it performs well to ensure employee productivity. Waiting ten seconds just to load the initial dashboard doesn't necessarily support that. At a recent customer engagement we identified an interesting source of a potential performance problem that impacts all SharePoint and .NET-based installations that use the ServicePointManager to access web services. It turns out that ServicePointManager comes with a default setting that allows two concurrent connections. If you happen to have a SharePoint dashboard that queries data from more than two data sources, your end users will suffer from a very long page load time. In this blog I explain the steps that one of our customers took to identify and solve this particular problem. This issue has a broader impact beyond SharePoint; I suggest all .NET developers to look into this issue.

Step 1: Identify Problematic Pages
The first question is: do we have a problem or not? You can either wait for your end users to start complaining to the help desk or be proactive and look at end-user response times. The following screenshot shows data from each individual visitor who accessed a SharePoint application. Focusing on one visit that was identified as having a frustrating experience shows the individual visited pages. Starting with an extremely costly first page (43 seconds to load) the visitor also suffered from an extremely slow response time for the following two actions (click on Home and reloading Default.aspx):

More than six seconds were spent only on server-side processing. There was also a very long wait at the Client (JS Time) for the initial page.

The long wait time at the Client (high JS-Time) could be explained as inefficient JavaScript that caused problems especially on older browsers such as Internet Explorer 7. The server-side problem, however, impacts every user - regardless of the browser used.

Step 2: Identify Problematic Web Parts
Drilling into the actual details of the Default.aspx page for that particular Visitor shows which Web Parts are involved in that Page as well as where these Web Parts spend most of their time:

Web Parts such as the DataFormWebPart or ContentEditorWebPart spend most of their time waiting on resources

Looking at the details shows us that these Web Parts actually spawn multiple background threads to retrieve data from different back-end web services and then they spend time waiting (sync) on those threads when they are done with their work. A closer look also reveals that each of these threads is taking a significant amount of time in I/O:

The WebParts spawn multiple background threads. These threads are all performing I/O operations that take up a very long time (up to 5.8s)

Step 3: Identify Root Cause of Problem
Why are all of these background threads taking so much time? Expanding the internals of the first call shows that it takes 5.8 seconds until the web service actually sends a response back on the socket. So - that explains why the first asynchronous thread takes 5.8 seconds:

First web service call takes 5.8s until we receive data on the socket that is used internally by the ServicePoint implementation.

The other web service calls executed by the remaining background threads pretty much go down through the same execution path spending most of their time waiting for an available outgoing connection:

We have a total of 10 background threads that try to execute a web service call. Most of them spend their time waiting in the ServicePoint instead of sending the actual request.

Step 4: Fix the Problem
Doing a little research (aka use your favorite search engine) on this brings up the following post on stackoverflow.com: Max Number of concurrent connections that ultimately leads us to the MSDN documentation for ServicePointManager where we learn that the default setting for concurrent connections is two.

The default of two concurrent connections causes parallel executing web service requests to wait until there is a free connection available.

So - the solution to this problem is to change the default value. In this case, it should be at least set to the number of allowed Web Parts on a single dashboard because most of them will execute asynchronous web service calls.

Next Steps
This problem is obviously not only relevant for custom SharePoint development but can impact any .NET application that uses ServicePointManager. It was a very interesting case with this customer as they only used out-of-the-box components provided by SharePoint and still ran into this problem. If you are implementing custom SharePoint solutions I also recommend checking out our blog series about the Top SharePoint Performance Problems when implementing your custom Web Parts and Web Controls starting with: How to Avoid the Top 5 SharePoint Performance Problems.

More Stories By Andreas Grabner

Andreas Grabner has been helping companies improve their application performance for 15+ years. He is a regular contributor within Web Performance and DevOps communities and a prolific speaker at user groups and conferences around the world. Reach him at @grabnerandi

Comments (0)

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.

@ThingsExpo Stories
What happens when the different parts of a vehicle become smarter than the vehicle itself? As we move toward the era of smart everything, hundreds of entities in a vehicle that communicate with each other, the vehicle and external systems create a need for identity orchestration so that all entities work as a conglomerate. Much like an orchestra without a conductor, without the ability to secure, control, and connect the link between a vehicle’s head unit, devices, and systems and to manage the ...
What are the successful IoT innovations from emerging markets? What are the unique challenges and opportunities from these markets? How did the constraints in connectivity among others lead to groundbreaking insights? In her session at @ThingsExpo, Carmen Feliciano, a Principal at AMDG, will answer all these questions and share how you can apply IoT best practices and frameworks from the emerging markets to your own business.
More and more brands have jumped on the IoT bandwagon. We have an excess of wearables – activity trackers, smartwatches, smart glasses and sneakers, and more that track seemingly endless datapoints. However, most consumers have no idea what “IoT” means. Creating more wearables that track data shouldn't be the aim of brands; delivering meaningful, tangible relevance to their users should be. We're in a period in which the IoT pendulum is still swinging. Initially, it swung toward "smart for smar...
In past @ThingsExpo presentations, Joseph di Paolantonio has explored how various Internet of Things (IoT) and data management and analytics (DMA) solution spaces will come together as sensor analytics ecosystems. This year, in his session at @ThingsExpo, Joseph di Paolantonio from DataArchon, will be adding the numerous Transportation areas, from autonomous vehicles to “Uber for containers.” While IoT data in any one area of Transportation will have a huge impact in that area, combining sensor...
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, discussed how research has demonstrated the value of Machine Learning in delivering next generation analytics to impr...
Successful digital transformation requires new organizational competencies and capabilities. Research tells us that the biggest impediment to successful transformation is human; consequently, the biggest enabler is a properly skilled and empowered workforce. In the digital age, new individual and collective competencies are required. In his session at 19th Cloud Expo, Bob Newhouse, CEO and founder of Agilitiv, will draw together recent research and lessons learned from emerging and established ...
The best way to leverage your Cloud Expo presence as a sponsor and exhibitor is to plan your news announcements around our events. The press covering Cloud Expo and @ThingsExpo will have access to these releases and will amplify your news announcements. More than two dozen Cloud companies either set deals at our shows or have announced their mergers and acquisitions at Cloud Expo. Product announcements during our show provide your company with the most reach through our targeted audiences.
Amazon has gradually rolled out parts of its IoT offerings, but these are just the tip of the iceberg. In addition to optimizing their backend AWS offerings, Amazon is laying the ground work to be a major force in IoT - especially in the connected home and office. In his session at @ThingsExpo, Chris Kocher, founder and managing director of Grey Heron, explained how Amazon is extending its reach to become a major force in IoT by building on its dominant cloud IoT platform, its Dash Button strat...
@ThingsExpo has been named the Top 5 Most Influential M2M Brand by Onalytica in the ‘Machine to Machine: Top 100 Influencers and Brands.' Onalytica analyzed the online debate on M2M by looking at over 85,000 tweets to provide the most influential individuals and brands that drive the discussion. According to Onalytica the "analysis showed a very engaged community with a lot of interactive tweets. The M2M discussion seems to be more fragmented and driven by some of the major brands present in the...
We are reaching the end of the beginning with WebRTC, and real systems using this technology have begun to appear. One challenge that faces every WebRTC deployment (in some form or another) is identity management. For example, if you have an existing service – possibly built on a variety of different PaaS/SaaS offerings – and you want to add real-time communications you are faced with a challenge relating to user management, authentication, authorization, and validation. Service providers will w...
DevOps is being widely accepted (if not fully adopted) as essential in enterprise IT. But as Enterprise DevOps gains maturity, expands scope, and increases velocity, the need for data-driven decisions across teams becomes more acute. DevOps teams in any modern business must wrangle the ‘digital exhaust’ from the delivery toolchain, "pervasive" and "cognitive" computing, APIs and services, mobile devices and applications, the Internet of Things, and now even blockchain. In this power panel at @...
SYS-CON Media announced today that @WebRTCSummit Blog, the largest WebRTC resource in the world, has been launched. @WebRTCSummit Blog offers top articles, news stories, and blog posts from the world's well-known experts and guarantees better exposure for its authors than any other publication. @WebRTCSummit Blog can be bookmarked ▸ Here @WebRTCSummit conference site can be bookmarked ▸ Here
One of biggest questions about Big Data is “How do we harness all that information for business use quickly and effectively?” Geographic Information Systems (GIS) or spatial technology is about more than making maps, but adding critical context and meaning to data of all types, coming from all different channels – even sensors. In his session at @ThingsExpo, William (Bill) Meehan, director of utility solutions for Esri, will take a closer look at the current state of spatial technology and ar...
SYS-CON Events announced today that Streamlyzer will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Streamlyzer is a powerful analytics for video streaming service that enables video streaming providers to monitor and analyze QoE (Quality-of-Experience) from end-user devices in real time.
You have great SaaS business app ideas. You want to turn your idea quickly into a functional and engaging proof of concept. You need to be able to modify it to meet customers' needs, and you need to deliver a complete and secure SaaS application. How could you achieve all the above and yet avoid unforeseen IT requirements that add unnecessary cost and complexity? You also want your app to be responsive in any device at any time. In his session at 19th Cloud Expo, Mark Allen, General Manager of...
SYS-CON Events announced today that SoftNet Solutions will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. SoftNet Solutions specializes in Enterprise Solutions for Hadoop and Big Data. It offers customers the most open, robust, and value-conscious portfolio of solutions, services, and tools for the shortest route to success with Big Data. The unique differentiator is the ability to architect and ...
The IoT industry is now at a crossroads, between the fast-paced innovation of technologies and the pending mass adoption by global enterprises. The complexity of combining rapidly evolving technologies and the need to establish practices for market acceleration pose a strong challenge to global enterprises as well as IoT vendors. In his session at @ThingsExpo, Clark Smith, senior product manager for Numerex, will discuss how Numerex, as an experienced, established IoT provider, has embraced a ...
Cloud based infrastructure deployment is becoming more and more appealing to customers, from Fortune 500 companies to SMEs due to its pay-as-you-go model. Enterprise storage vendors are able to reach out to these customers by integrating in cloud based deployments; this needs adaptability and interoperability of the products confirming to cloud standards such as OpenStack, CloudStack, or Azure. As compared to off the shelf commodity storage, enterprise storages by its reliability, high-availabil...
Donna Yasay, President of HomeGrid Forum, today discussed with a panel of technology peers how certification programs are at the forefront of interoperability, and the answer for vendors looking to keep up with today's growing industry for smart home innovation. "To ensure multi-vendor interoperability, accredited industry certification programs should be used for every product to provide credibility and quality assurance for retail and carrier based customers looking to add ever increasing num...
SYS-CON Events announced today that Super Micro Computer, Inc., a global leader in Embedded and IoT solutions, will exhibit at SYS-CON's 20th International Cloud Expo®, which will take place on June 7-9, 2017, at the Javits Center in New York City, NY. Supermicro (NASDAQ: SMCI), the leading innovator in high-performance, high-efficiency server technology, is a premier provider of advanced server Building Block Solutions® for Data Center, Cloud Computing, Enterprise IT, Hadoop/Big Data, HPC and ...