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SaaS-Based APM: How to Troubleshoot Application Performance in Production

Finding the Root Cause of Application Performance Issues in Production

The most enjoyable part of my job at AppDynamics is to witness and evangelize customer success. What’s slightly strange is that for this to happen, an application has to slow down or crash.

It’s a bittersweet feeling when End Users, Operations, Developers and many Businesses suffer application performance pain. Outages cost the business money, but sometimes they cost people their jobs–which is truly unfortunate. However, when people solve performance issues, they become overnight heroes with a great sense of achievement, pride, and obviously relief.

To explain the complexity of managing application performance, imagine your application is 100 haystacks that represent tiers, and somewhere a needle is hurting your end user experience. It’s your job to find the needle as quickly as possible! The problem is, each haystack has over half a million pieces of hay, and they each represent lines of code in your application. It’s therefore no surprise that organizations can take days or weeks to find the root cause of performance issues in large, complex, distributed production environments.

End User Experience Monitoring, Application Mapping and Transaction profiling will help you identify unhappy users, slow business transactions, and problematic haystacks (tiers) in your application, but they won’t find needles. To do this, you’ll need x-ray visibility inside haystacks to see which pieces of hay (lines of code) are holding the needle (root cause) that is hurting your end users. This X-Ray visibility is known as “Deep Diagnostics” in application monitoring terms, and it represents the difference between isolating performance issues and resolving them.

For example, AppDynamics has great End User Monitoring, Business Transaction Monitoring, Application Flow Maps and very cool analytics all integrated into a single product. They all look and sound great (honestly they do), but they only identify and isolate performance issues to an application tier. This is largely what Business Transaction Management (BTM) and Network Performance Management (NPM) solutions do today. They’ll tell you what and where a business transaction slows down, but they won’t tell you the root cause so you can resolve the issues.

Why Deep Diagnostics for Production Monitoring Matters

A key reason why AppDynamics has become very successful in just a few years is because our Deep Diagnostics, behavioral learning, and analytics technology is 18 months ahead of the nearest vendor. A bold claim? Perhaps, but it’s backed up by bold customer case studies such as Edmunds.com and Karavel, who compared us against some of the top vendors in the application performance management (APM) market in 2011. Yes, End User Monitoring, Application Mapping and Transaction Profiling are important–but these capabilities will only help you isolate performance pain, not resolve it.

AppDynamics has the ability to instantly show the complete code execution and timing of slow user requests or business transactions for any Java or .NET application, in production, with incredibly small overhead and no configuration. We basically give customers a metal detector and X-Ray vision to help them find needles in haystacks. Locating the exact line of code responsible for a performance issue means Operations and Developers solve business pain faster, and this is a key reason why AppDynamics technology is disrupting the market.

Below is a small collection of needles that customers found using AppDynamics in production. The simple fact is that complete code visibility allows customers to troubleshoot in minutes as opposed to days and weeks. Monitoring with blind spots and configuring instrumentation are a thing of the past with AppDynamics.

Needle #1 – Slow SQL Statement

Industry: Education
Pain: Key Business Transaction with 5 sec response times
Root Cause: Slow JDBC query with full-table scan


Needle #2 – Slice of Death in Cassandra

Industry: SaaS Provider
Pain: Key Business Transaction with 2.5 sec response times
Root Cause: Slow Thrift query in Cassandra


Needle #3 – Slow & Chatty Web Service Calls

Industry: Media
Pain: Several Business Transactions with 2.5 min response times
Root Cause: Excessive Web Service Invocation (5+ per trx)


Needle #4 -Extreme XML processing

Industry: Retail/E-Commerce
Pain: Key Business Transaction with 17 sec response times
Root Cause: XML serialization over the wire.


Needle #5 – Mail Server Connectivity

Industry: Retail/E-Commerce
Pain: Key Business Transaction with 20 sec response times
Root Cause: Slow Mail Server Connectivity


Needle #6 – Slow ResultSet Iteration

Industry: Retail/E-Commerce
Pain: Several Business Transactions with 30+ sec response times
Root Cause: Querying too much data


Needle #7 – Slow Security 3rd Party Framework

Industry: Education
Pain: All Business Transactions with > 3 sec response times
Root Cause: Slow 3rd party code


Needle #8 – Excessive SQL Queries

Industry: Education
Pain: Key Business Transactions with 2 min response times
Root Cause: Thousands of SQL queries per transaction


Needle #9 – Commit Happy

Industry: Retail/E-Commerce
Pain: Several Business Transactions with 25+ sec response times
Root Cause: Unnecessary use of commits and transaction management.


Needle #10 – Locking under Concurrency

Industry: Retail/E-Commerce
Pain: Several Business Transactions with 5+ sec response times
Root Cause: Non-Thread safe cache forces locking for read/write consistency



Needle #11 – Slow 3rd Party Search Service

Industry: SaaS Provider
Pain: Key Business Transaction with 2+ min response times
Root Cause: Slow 3rd Party code



Needle #12 – Connection Pool Exhaustion

Industry: Financial Services
Pain: Several Business Transactions with 7+ sec response times
Root Cause: DB Connection Pool Exhaustion caused by excessive connection pool invocation & queries


Needle #13 – Excessive Cache Usage

Industry: Retail/E-Commerce

Pain: Several Business Transactions with 50+ sec response times
Root Cause: Cache Sizing & Configuration

If you want to manage and troubleshoot application performance in production, you should seriously consider AppDynamics. We’re the fastest growing on-premise and SaaS based APM vendor in the market right now. You can download our free product AppDynamics Lite or take a free 30-day trial of AppDynamics Pro – our commercial product.

Now go find those needles that are hurting your end users!

App Man.

More Stories By Jyoti Bansal

In high-production environments where release cycles are measured in hours or minutes — not days or weeks — there's little room for mistakes and no room for confusion. Everyone has to understand what's happening, in real time, and have the means to do whatever is necessary to keep applications up and running optimally.

DevOps is a high-stakes world, but done well, it delivers the agility and performance to significantly impact business competitiveness.

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