|By Charles Rich||
|January 22, 2013 10:00 AM EST||
*&%#* The system is running slow again! Now what? Is there a space hog application sucking up all my resources? Did we just crash? No, must not say that word...must not say that word... ...still running, just sloooowly. I wonder if anything new has been installed… Nice if they told me. I overheard that something new might have been installed last week. Could there be a memory leak? Are they checking for one? Are they looking in the right place? Hide and seek with a leak is NO fun. How many times have you sat staring at your monitor until your eyes burn and blur, trying to figure out where the problem lies?
There are so many places to look for a leak, that it is virtually impossible to find manually. And how do I tell the difference between a leak and increased demand? The symptoms can be similar. It is important to analyze all of the leak possibilities, because at the end of the day, if you are leaking memory in the JVM, you will find an increase in the heap and an increase in GC activity, culminating in hangs or blocks and finally, OutOfMemory exceptions. If the Java code is meant to run on a server 24 hours a day, then memory leaks can become significant. Even the smallest leak in code that is run continuously will eventually result in the JVM exhausting all of the memory available.
Some examples of Memory Leak causes are:
- Handle Leak
- Class Loader Leak
- Thread Leak
- Unchecked arrays
- Bugs in the code
- Unchecked hash map growth
- Programmers forgetting to close prepared statements, sockets or file handles
Some of these problems are extremely difficult to troubleshoot. These leaks need to be found, addressed and handled ASAP. With the number of things an IT group has to handle on any given day, there just isn't the time or the manpower to take an exceptional amount of time to deal with manual leak detection. Automation is the only logical way to find them. To be notified when there is a possible leak detected and how to mitigate a JVM failure is the optimal solution. No headaches, no blurry vision, no screaming users. How good life could be. For more information on how you can automate your leak detection and ease the stress of your day, listen to the Nastel TechTalk, “Java Memory Leaks II – Detection to Diagnostics”
While poor system performance occurs for any number of reasons (poor code, understaffed teams, inadequate legacy systems), this week’s post should help you quickly diagnose and fix a few common problems, while setting yourself up for a more stable future at the same time. Modern application frameworks have made it very easy to build not only powerful back-ends, but also rich, web-based user interfaces that are pushed out to the client in real-time. Often this involves a lot of data being transf...
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InfoScout in San Francisco gleans new levels of accurate insights into retail buyer behavior by collecting data directly from consumers’ sales receipts. In order to better analyze actual retail behaviors and patterns, InfoScout provides incentives for buyers to share their receipts, but InfoScout is then faced with the daunting task of managing and cleansing that essential data to provide actionable and understandable insights.
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Best practices for helping DevOps and Test collaborate in ways that make your SDLC leaner and more scalable. The business demand for "more innovative software, faster" is driving a surge of interest in DevOps, Agile and Lean software development practices. However, today's testing processes are typically bogged down by weighty burdens such as the difficulty of 1) accessing complete Dev/Test environments; 2) acquiring complete, sanitized test data; and 3) configuring the behavior of the environm...
Apr. 1, 2015 03:20 PM EDT Reads: 464
SYS-CON Events announced today that MangoApps will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY., and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. MangoApps provides private all-in-one social intranets allowing workers to securely collaborate from anywhere in the world and from any device. Social, mobile, and eas...
Apr. 1, 2015 03:00 PM EDT Reads: 3,292
As a group of concepts, DevOps has converged on several prominent themes including continuous software delivery, automation, and configuration management (CM). These integral pieces often form the pillars of an organization’s DevOps efforts, even as other bigger pieces like overarching best practices and guidelines are still being tried and tested. Being that DevOps is a relatively new paradigm - movement - methodology - [insert your own label here], standards around it have yet to be codified a...
Apr. 1, 2015 03:00 PM EDT Reads: 973
SYS-CON Events announced today that Solgenia will exhibit at SYS-CON's 16th International Cloud Expo®, which will take place on June 9-11, 2015, at the Javits Center in New York City, NY, and the 17th International Cloud Expo®, which will take place on November 3–5, 2015, at the Santa Clara Convention Center in Santa Clara, CA. Solgenia is the global market leader in Cloud Collaboration and Cloud Infrastructure software solutions. Designed to “Bridge the Gap” between Personal and Professional S...
Apr. 1, 2015 03:00 PM EDT Reads: 3,129
Learn the top API testing issues that organizations encounter and how automation plus a DevOps team approach can address these top API testing challenges. Ensuring API integrity is difficult in today's complex application cloud, on-premises and hybrid environment scenarios. In this interview with TechTarget, Parasoft solution architect manager Spencer Debrosse shares his experiences about the top API testing issues that organizations encounter and how automation and a DevOps team approach can a...
Apr. 1, 2015 02:00 PM EDT Reads: 541
Chef and Canonical announced a partnership to integrate and distribute Chef with Ubuntu. Canonical is integrating the Chef automation platform with Canonical's Machine-As-A-Service (MAAS), enabling users to automate the provisioning, configuration and deployment of bare metal compute resources in the data center. Canonical is packaging Chef 12 server in upcoming distributions of its Ubuntu open source operating system and will provide commercial support for Chef within its user base.
Apr. 1, 2015 01:00 PM EDT Reads: 639
When it comes to microservices there are myths and uncertainty about the journey ahead. Deploying a “Hello World” app on Docker is a long way from making microservices work in real enterprises with large applications, complex environments and existing organizational structures. February 19, 2015 10:00am PT / 1:00pm ET → 45 Minutes Join our four experts: Special host Gene Kim, Gary Gruver, Randy Shoup and XebiaLabs’ Andrew Phillips as they explore the realities of microservices in today’s IT worl...
Apr. 1, 2015 12:45 PM EDT Reads: 1,951
After what feel like an interminable cycle of media frenzy followed by hype and hysteria cycles, the practical elements of real world cloud implementations are starting to become better documented. But what is really different in the cloud? How do software applications behave, live, interact and interconnect inside the cloud? Where do cloud architectures differ so markedly from their predecessors that we need to learn a new set of mechanics – and, when do we start to refer to software progra...
Apr. 1, 2015 12:45 PM EDT Reads: 582
The world's leading Cloud event, Cloud Expo has launched Microservices Journal on the SYS-CON.com portal, featuring over 19,000 original articles, news stories, features, and blog entries. DevOps Journal is focused on this critical enterprise IT topic in the world of cloud computing. Microservices Journal 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. Follow new article posts on T...
Apr. 1, 2015 12:00 PM EDT Reads: 1,632
Even though it’s now Microservices Journal, long-time fans of SOA World Magazine can take comfort in the fact that the URL – soa.sys-con.com – remains unchanged. And that’s no mistake, as microservices are really nothing more than a new and improved take on the Service-Oriented Architecture (SOA) best practices we struggled to hammer out over the last decade. Skeptics, however, might say that this change is nothing more than an exercise in buzzword-hopping. SOA is passé, and now that people are ...
Apr. 1, 2015 12:00 PM EDT Reads: 1,499
Hosted PaaS providers have given independent developers and startups huge advantages in efficiency and reduced time-to-market over their more process-bound counterparts in enterprises. Software frameworks are now available that allow enterprise IT departments to provide these same advantages for developers in their own organization. In his workshop session at DevOps Summit, Troy Topnik, ActiveState’s Technical Product Manager, will show how on-prem or cloud-hosted Private PaaS can enable organ...
Apr. 1, 2015 12:00 PM EDT Reads: 1,474
For those of us that have been practicing SOA for over a decade, it's surprising that there's so much interest in microservices. In fairness microservices don't look like the vendor play that was early SOA in the early noughties. But experienced SOA practitioners everywhere will be wondering if microservices is actually a good thing. You see microservices is basically an SOA pattern that inherits all the well-known SOA principles and adds characteristics that address the use of SOA for distribut...
Apr. 1, 2015 11:00 AM EDT Reads: 1,139
SYS-CON Events announced today the IoT Bootcamp – Jumpstart Your IoT Strategy, being held June 9–10, 2015, in conjunction with 16th Cloud Expo and Internet of @ThingsExpo at the Javits Center in New York City. This is your chance to jumpstart your IoT strategy. Combined with real-world scenarios and use cases, the IoT Bootcamp is not just based on presentations but includes hands-on demos and walkthroughs. We will introduce you to a variety of Do-It-Yourself IoT platforms including Arduino, Ras...
Apr. 1, 2015 11:00 AM EDT Reads: 2,291
Microservice architectures are the new hotness, even though they aren't really all that different (in principle) from the paradigm described by SOA (which is dead, or not dead, depending on whom you ask). One of the things this decompositional approach to application architecture does is encourage developers and operations (some might even say DevOps) to re-evaluate scaling strategies. In particular, the notion is forwarded that an application should be built to scale and then infrastructure sho...
Apr. 1, 2015 11:00 AM EDT Reads: 2,615
Our guest on the podcast this week is Jason Bloomberg, President at Intellyx. When we build services we want them to be lightweight, stateless and scalable while doing one thing really well. In today's cloud world, we're revisiting what to takes to make a good service in the first place. Listen in to learn why following "the book" doesn't necessarily mean that you're solving key business problems.
Apr. 1, 2015 10:45 AM EDT Reads: 1,402
Microservices are the result of decomposing applications. That may sound a lot like SOA, but SOA was based on an object-oriented (noun) premise; that is, services were built around an object - like a customer - with all the necessary operations (functions) that go along with it. SOA was also founded on a variety of standards (most of them coming out of OASIS) like SOAP, WSDL, XML and UDDI. Microservices have no standards (at least none deriving from a standards body or organization) and can be b...
Apr. 1, 2015 10:45 AM EDT Reads: 2,328
Right off the bat, Newman advises that we should "think of microservices as a specific approach for SOA in the same way that XP or Scrum are specific approaches for Agile Software development". These analogies are very interesting because my expectation was that microservices is a pattern. So I might infer that microservices is a set of process techniques as opposed to an architectural approach. Yet in the book, Newman clearly includes some elements of concept model and architecture as well as p...
Apr. 1, 2015 10:15 AM EDT Reads: 2,248
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Apr. 1, 2015 10:00 AM EDT Reads: 1,808