Click here to close now.

Welcome!

IoT User Interface Authors: Elizabeth White, PagerDuty Blog, Liz McMillan, Pat Romanski, Dana Gardner

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.


@CloudExpo Stories
"ciqada is a combined platform of hardware modules and server products that lets people take their existing devices or new devices and lets them be accessible over the Internet for their users," noted Geoff Engelstein of ciqada, a division of Mars International, in this SYS-CON.tv interview at @ThingsExpo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that Alert Logic, the leading provider of Security-as-a-Service solutions for the cloud, has been named “Bronze Sponsor” of SYS-CON's 17th International Cloud Expo® and DevOps Summit 2015 Silicon Valley, which will take place November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Alert Logic provides Security-as-a-Service for on-premises, cloud, and hybrid IT infrastructures, delivering deep security insight and continuous protection for cust...
The 17th International Cloud Expo has announced that its Call for Papers is open. 17th International Cloud Expo, to be held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, APM, APIs, Microservices, Security, Big Data, Internet of Things, DevOps 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 bu...
"A lot of the enterprises that have been using our systems for many years are reaching out to the cloud - the public cloud, the private cloud and hybrid," stated Reuven Harrison, CTO and Co-Founder of Tufin, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
"We got started as search consultants. On the services side of the business we have help organizations save time and save money when they hit issues that everyone more or less hits when their data grows," noted Otis Gospodnetić, Founder of Sematext, in this SYS-CON.tv interview at @DevOpsSummit, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that SoftLayer, an IBM company, has been named “Gold Sponsor” of SYS-CON's 17th International Cloud Expo®, which will take place November 3–5, 2015 at the Santa Clara Convention Center in Santa Clara, CA. SoftLayer operates a global cloud infrastructure platform built for Internet scale. With a global footprint of data centers and network points of presence, SoftLayer provides infrastructure as a service to leading-edge customers ranging from Web startups to globa...
The 5th International DevOps Summit, co-located with 17th International Cloud Expo – being held November 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA – 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 ...
Internet of Things (IoT) will be a hybrid ecosystem of diverse devices and sensors collaborating with operational and enterprise systems to create the next big application. In their session at @ThingsExpo, Bramh Gupta, founder and CEO of robomq.io, and Fred Yatzeck, principal architect leading product development at robomq.io, discussed how choosing the right middleware and integration strategy from the get-go will enable IoT solution developers to adapt and grow with the industry, while at th...
SYS-CON Events announced today that Intelligent Systems Services will exhibit at the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Established in 1994, Intelligent Systems Services Inc. is located near Washington, DC, with representatives and partners nationwide. ISS’s well-established track record is based on the continuous pursuit of excellence in designing, implementing and supporting nationwide clients’ ...
SYS-CON Events announced today that Cloudian, Inc., the leading provider of hybrid cloud storage solutions, will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Cloudian, Inc., is a Foster City, California - based software company specializing in cloud storage software. The main product is Cloudian, an Amazon S3-compliant cloud object storage platform, the bedrock of cloud computing system...
DevOps Summit, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud 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 for long development...
The last decade was about virtual machines, but the next one is about containers. Containers enable a service to run on any host at any time. Traditional tools are starting to show cracks because they were not designed for this level of application portability. Now is the time to look at new ways to deploy and manage applications at scale. In his session at @DevOpsSummit, Brian “Redbeard” Harrington, a principal architect at CoreOS, will examine how CoreOS helps teams run in production. Attende...
The enterprise market will drive IoT device adoption over the next five years. In his session at @ThingsExpo, John Greenough, an analyst at BI Intelligence, division of Business Insider, analyzed how companies will adopt IoT products and the associated cost of adopting those products. John Greenough is the lead analyst covering the Internet of Things for BI Intelligence- Business Insider’s paid research service. Numerous IoT companies have cited his analysis of the IoT. Prior to joining BI In...
Containers are changing the security landscape for software development and deployment. As with any security solutions, security approaches that work for developers, operations personnel and security professionals is a requirement. In his session at DevOps Summit, Kevin Gilpin, CTO and Co-Founder of Conjur, will discuss various security considerations for container-based infrastructure and related DevOps workflows.
With major technology companies and startups seriously embracing IoT strategies, now is the perfect time to attend @ThingsExpo in Silicon Valley. Learn what is going on, contribute to the discussions, and ensure that your enterprise is as "IoT-Ready" as it can be! Internet of @ThingsExpo, taking place Nov 3-5, 2015, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 17th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading in...
DevOps tends to focus on the relationship between Dev and Ops, putting an emphasis on the ops and application infrastructure. But that’s changing with microservices architectures. In her session at DevOps Summit, Lori MacVittie, Evangelist for F5 Networks, will focus on how microservices are changing the underlying architectures needed to scale, secure and deliver applications based on highly distributed (micro) services and why that means an expansion into “the network” for DevOps.
SYS-CON Events announced today that Secure Infrastructure & Services will exhibit at SYS-CON's 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Secure Infrastructure & Services (SIAS) is a managed services provider of cloud computing solutions for the IBM Power Systems market. The company helps mid-market firms built on IBM hardware platforms to deploy new levels of reliable and cost-effective computing and hig...
In his session at 16th Cloud Expo, Simone Brunozzi, VP and Chief Technologist of Cloud Services at VMware, reviewed the changes that the cloud computing industry has gone through over the last five years and shared insights into what the next five will bring. He also chronicled the challenges enterprise companies are facing as they move to the public cloud. He delved into the "Hybrid Cloud" space and explained why every CIO should consider ‘hybrid cloud' as part of their future strategy to achie...
SYS-CON Events announced today that JFrog, maker of Artifactory, the popular Binary Repository Manager, will exhibit at SYS-CON's @DevOpsSummit Silicon Valley, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Based in California, Israel and France, founded by longtime field-experts, JFrog, creator of Artifactory and Bintray, has provided the market with the first Binary Repository solution and a software distribution social platform.
The basic integration architecture, as defined by ESBs, hasn’t changed for more than a decade. Most cloud integration providers still rely on an ESB architecture and their proprietary connectors. As a result, enterprise integration projects suffer from constraints of availability and reliability of these connectors that are not re-usable across other integration vendors. However, the rapid adoption of APIs and almost ubiquitous availability of APIs amongst most SaaS and Cloud applications are ra...