Click here to close now.




















Welcome!

@BigDataExpo Authors: Adrian Bridgwater, Elizabeth White, Dana Gardner, Bob Gourley, Pat Romanski

Related Topics: @DevOpsSummit, Java IoT, Microservices Expo, Linux Containers, IoT User Interface, PHP

@DevOpsSummit: Blog Post

Top PHP Performance Tips for Continuous Delivery | @DevOpsSummit [#DevOps]

The top performance bottlenecks are fairly easy to spot

Are you developing or hosting PHP applications? Are you doing performance sanity checks along your delivery pipeline? No? Not Yet? Then start with a quick check. It only takes 15 minutes and it really pays off. As a developer you can improve your code, and as somebody responsible for your build pipeline you can automate these checks and enforce additional quality gates. And as a PHP Hosting company / group you will be able optimize your deployment and run more of these apps and sustain more load on the same infrastructure.

Just like Java, .NET, and Ruby type applications, the top performance bottlenecks are fairly easy to spot and fixing them improves end user performance and saves compute power for your servers.

Here is what we discovered when analyzing our own Moodle-based educational platform using the 15 Day Free Trial of dynaTrace:

  • High PHP Compilation Time: Our App spends up to 66% of the time in compilation
  • Bad database access patterns: Some of our web requests execute up to 592 SQL requests
  • Inefficient PHP coding: Rendering HTML lists in result pages takes 5+ seconds

If you are interested in learning more about PHP Performance, be sure to check these posts out: Basic PHP Performance Tips (Google Dev) and 5 Things to Improve PHP Performance (DZone).

#1: PHP Compilation Time
In a standard PHP installation every web request processed by the PHP engine will be compiled. The compiled code will not be cached which means PHP needs to re-compile the same code when the next request comes in. In our system we saw compilation time spikes of up to 66% of the total execution time:

Many of our requests spend a lot of time in compiling complex PHP files. Optimizing these files will improve overall response time

It also pays off to analyze PHP Compilation Time long term. In our case we noticed that a new deployment let the Compilation Time Contribution jump to twice of what it was before. Having this insight allows you to review your code changes as well as think off using PHP Compilation Caching using PHP Accelerators.

Warning Signal for PHP Monitoring: A change in our deployment in combination with more traffic on April 3rd caused our PHP Compilation Time contribution to double

Key Takeaways

  • Developers: Analyze compilation time of your PHP code to identify complex coding early on
  • Testers: Watch out for PHP Compilation Time changes from build to build to identify regressions early on
  • Operations: Use PHP Accelerators as part of your PHP deployment in order to speed up overall PHP performance

#2: Bad database access patterns
Bad database access patterns are a common theme in the blog posts we write, mainly focusing on Java and .NET Enterprise Apps. Check out DB Access Patterns Gone Wild or When It Really Is The DB To Blame.

PHP Applications face the same problems. Watch out for the N+1 Query Problem; executing the same SQL multiple times per request or requesting data with multiple SQLs instead of optimizing a single SELECT statement:

Instead of specifying a proper IN-Clause the same SQL is executed hundreds of times with different WHERE-Clause causing unnecessary DB Roundtrips

Executing the exact same SQL up to 95 times is a sign for caching the data instead of requesting it over and over again from the database

To spot these problematic access patterns in production simply monitor the number of database executions and compare them with the incoming transactions as well as total database time as shown in the following chart:

In a production environment you do not want to see many spikes in database execution count and time that don't correlate to incoming load. That would indicate a data-driven performance/architectural problem

Key takeaways

  • Developers: Analyze which statements get really executed by your code as well as any third-party libraries you use to access code
  • Database Engineers: Watch out for SQL Executions from PHP and sit down with engineers to optimize their SQL queries in their code. Provide guidance on SQL coding or stored procedures instead of having them execute hundreds of SELECT queries
  • Testers: When executing load tests watch out for any load-related DB access patterns. Which "static" data is queried all the time and might be better off by caching it in the application?
  • Operations: Monitor spikes in # of SQL Executions and whether that relates to a data-driven problem such as a user using a very exotic search term that results in too many SQL queries

For tip #3, and for further insight, click here for the full article

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.


@BigDataExpo Stories
One of the hottest areas in cloud right now is DRaaS and related offerings. In his session at 16th Cloud Expo, Dale Levesque, Disaster Recovery Product Manager with Windstream's Cloud and Data Center Marketing team, will discuss the benefits of the cloud model, which far outweigh the traditional approach, and how enterprises need to ensure that their needs are properly being met.
"We've just seen a huge influx of new partners coming into our ecosystem, and partners building unique offerings on top of our API set," explained Seth Bostock, Chief Executive Officer at IndependenceIT, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
SYS-CON Events announced today that HPM Networks 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. For 20 years, HPM Networks has been integrating technology solutions that solve complex business challenges. HPM Networks has designed solutions for both SMB and enterprise customers throughout the San Francisco Bay Area.
For IoT to grow as quickly as analyst firms’ project, a lot is going to fall on developers to quickly bring applications to market. But the lack of a standard development platform threatens to slow growth and make application development more time consuming and costly, much like we’ve seen in the mobile space. In his session at @ThingsExpo, Mike Weiner, Product Manager of the Omega DevCloud with KORE Telematics Inc., discussed the evolving requirements for developers as IoT matures and conducte...
With SaaS use rampant across organizations, how can IT departments track company data and maintain security? More and more departments are commissioning their own solutions and bypassing IT. A cloud environment is amorphous and powerful, allowing you to set up solutions for all of your user needs: document sharing and collaboration, mobile access, e-mail, even industry-specific applications. In his session at 16th Cloud Expo, Shawn Mills, President and a founder of Green House Data, discussed h...
There are many considerations when moving applications from on-premise to cloud. It is critical to understand the benefits and also challenges of this migration. A successful migration will result in lower Total Cost of Ownership, yet offer the same or higher level of robustness. In his session at 15th Cloud Expo, Michael Meiner, an Engineering Director at Oracle, Corporation, analyzed a range of cloud offerings (IaaS, PaaS, SaaS) and discussed the benefits/challenges of migrating to each offe...
Malicious agents are moving faster than the speed of business. Even more worrisome, most companies are relying on legacy approaches to security that are no longer capable of meeting current threats. In the modern cloud, threat diversity is rapidly expanding, necessitating more sophisticated security protocols than those used in the past or in desktop environments. Yet companies are falling for cloud security myths that were truths at one time but have evolved out of existence.
Public Cloud IaaS started its life in the developer and startup communities and has grown rapidly to a $20B+ industry, but it still pales in comparison to how much is spent worldwide on IT: $3.6 trillion. In fact, there are 8.6 million data centers worldwide, the reality is many small and medium sized business have server closets and colocation footprints filled with servers and storage gear. While on-premise environment virtualization may have peaked at 75%, the Public Cloud has lagged in adop...
The Cloud industry has moved from being more than just being able to provide infrastructure and management services on the Cloud. Enter a new era of Cloud computing where monetization’s services through the Cloud are an essential piece of strategy to feed your organizations bottom-line, your revenue and Profitability. In their session at 16th Cloud Expo, Ermanno Bonifazi, CEO & Founder of Solgenia, and Ian Khan, Global Strategic Positioning & Brand Manager at Solgenia, discussed how to easily o...
Growth hacking is common for startups to make unheard-of progress in building their business. Career Hacks can help Geek Girls and those who support them (yes, that's you too, Dad!) to excel in this typically male-dominated world. Get ready to learn the facts: Is there a bias against women in the tech / developer communities? Why are women 50% of the workforce, but hold only 24% of the STEM or IT positions? Some beginnings of what to do about it! In her Opening Keynote at 16th Cloud Expo, S...
In his keynote at 16th Cloud Expo, Rodney Rogers, CEO of Virtustream, discussed the evolution of the company from inception to its recent acquisition by EMC – including personal insights, lessons learned (and some WTF moments) along the way. Learn how Virtustream’s unique approach of combining the economics and elasticity of the consumer cloud model with proper performance, application automation and security into a platform became a breakout success with enterprise customers and a natural fit f...
"We have been in business for 21 years and have been building many enterprise solutions, all IT plumbing - server, storage, interconnects," stated Alex Gorbachev, President of Intelligent Systems Services, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
The essence of cloud computing is that all consumable IT resources are delivered as services. In his session at 15th Cloud Expo, Yung Chou, Technology Evangelist at Microsoft, demonstrated the concepts and implementations of two important cloud computing deliveries: Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). He discussed from business and technical viewpoints what exactly they are, why we care, how they are different and in what ways, and the strategies for IT to tran...
Discussions about cloud computing are evolving into discussions about enterprise IT in general. As enterprises increasingly migrate toward their own unique clouds, new issues such as the use of containers and microservices emerge to keep things interesting. In this Power Panel at 16th Cloud Expo, moderated by Conference Chair Roger Strukhoff, panelists addressed the state of cloud computing today, and what enterprise IT professionals need to know about how the latest topics and trends affect t...
"Our biggest growth area has been the security services, the managed services - the things that differentiate us in the market that there is no client that's too small and there's no client that's too big," explained Paul Mazzucco, Chief Security Officer at TierPoint, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
"We do data integration for B2B also application to application, and we do data management and enable Big Data," explained Pat Adamiak, Vice President, Product Marketing at Liaison Technologies, in this SYS-CON.tv interview at 16th Cloud Expo, held June 9-11, 2015, at the Javits Center in New York City.
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society-changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his session at @ThingsExpo, Jason Mondanaro, Director, Product Management at Metanga, discussed how you can plan to cooperate, partner, and form lasting all-star teams to change the world...
SYS-CON Events announced today that Agema Systems 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. Agema Systems is the leading provider of critical white-box rack solutions to data centers through the major integrators and value added distribution channels.
Converging digital disruptions is creating a major sea change - Cisco calls this the Internet of Everything (IoE). IoE is the network connection of People, Process, Data and Things, fueled by Cloud, Mobile, Social, Analytics and Security, and it represents a $19Trillion value-at-stake over the next 10 years. In her keynote at @ThingsExpo, Manjula Talreja, VP of Cisco Consulting Services, discussed IoE and the enormous opportunities it provides to public and private firms alike. She will share w...
In the midst of the widespread popularity and adoption of cloud computing, it seems like everything is being offered “as a Service” these days: Infrastructure? Check. Platform? You bet. Software? Absolutely. Toaster? It’s only a matter of time. With service providers positioning vastly differing offerings under a generic “cloud” umbrella, it’s all too easy to get confused about what’s actually being offered. In his session at 16th Cloud Expo, Kevin Hazard, Director of Digital Content for SoftL...