Welcome!

@DevOpsSummit Authors: Yeshim Deniz, Elizabeth White, Liz McMillan, Pat Romanski, Aruna Ravichandran

Related Topics: @DevOpsSummit, Java IoT, Microservices Expo, Linux Containers, Machine Learning , 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.


@DevOpsSummit Stories
SYS-CON Events announced today that Dasher Technologies will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Dasher Technologies, Inc. ® is a premier IT solution provider that delivers expert technical resources along with trusted account executives to architect and deliver complete IT solutions and services to help our clients execute their goals, plans and objectives. Since 1999, we've helped public, private and nonprofit organizations implement technology solutions that speed and simplify their operations. As one of the fastest growing IT solution providers in the country, we have gained a reputation for effortless implementations with relentless follow-through and enduring support.
SYS-CON Events announced today that NetApp has been named “Bronze Sponsor” of SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. NetApp is the data authority for hybrid cloud. NetApp provides a full range of hybrid cloud data services that simplify management of applications and data across cloud and on-premises environments to accelerate digital transformation. Together with their partners, NetApp empowers global organizations to unleash the full potential of their data to expand customer touchpoints, foster greater innovation and optimize their operations.
SYS-CON Events announced today that IBM has been named “Diamond Sponsor” of SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California.
SYS-CON Events announced today that TidalScale, a leading provider of systems and services, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. TidalScale has been involved in shaping the computing landscape. They've designed, developed and deployed some of the most important and successful systems and services in the history of the computing industry - internet, Ethernet, operating systems, programming languages and microprocessors. Their elite team has collectively earned dozens of patents, three film credits and grown record setting businesses. And collectively, they've shipped more than 2 billion licensed products. They are difference makers who have a reputation for delivering innovative products and accomplishing what many others don't believe is even possible. They are ...
Infoblox delivers Actionable Network Intelligence to enterprise, government, and service provider customers around the world. They are the industry leader in DNS, DHCP, and IP address management, the category known as DDI. We empower thousands of organizations to control and secure their networks from the core-enabling them to increase efficiency and visibility, improve customer service, and meet compliance requirements.
In his session at 21st Cloud Expo, Michael Burley, a Senior Business Development Executive in IT Services at NetApp, will describe how NetApp designed a three-year program of work to migrate 25PB of a major telco's enterprise data to a new STaaS platform, and then secured a long-term contract to manage and operate the platform. This significant program blended the best of NetApp’s solutions and services capabilities to enable this telco’s successful adoption of private cloud storage and launching of virtual storage services to its enterprise market.
SYS-CON Events announced today that IBM has been named “Diamond Sponsor” of SYS-CON's 21st Cloud Expo, which will take place on October 31 through November 2nd 2017 at the Santa Clara Convention Center in Santa Clara, California.
Cloud Expo, Inc. has announced today that Andi Mann and Aruna Ravichandran have been named Co-Chairs of @DevOpsSummit at Cloud Expo Silicon Valley which will take place Oct. 31-Nov. 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. "DevOps is at the intersection of technology and business-optimizing tools, organizations and processes to bring measurable improvements in productivity and profitability," said Aruna Ravichandran, vice president, DevOps product and solutions marketing, CA Technologies. "It's this results-driven combination of technology and business that makes me so passionate about DevOps and its future in the industry. I am truly honored to take on this co-chair role, and look forward to working with the DevOps Summit team at Cloud Expo and attendees to advance DevOps."
Join IBM November 1 at 21st Cloud Expo at the Santa Clara Convention Center in Santa Clara, CA, and learn how IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Cognitive analysis impacts today’s systems with unparalleled ability that were previously available only to manned, back-end operations. Thanks to cloud processing, IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Imagine a robot vacuum that becomes your personal assistant that knows everything and can respond to your emotions and verbal commands!
In a recent survey, Sumo Logic surveyed 1,500 customers who employ cloud services such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform (GCP). According to the survey, a quarter of the respondents have already deployed Docker containers and nearly as many (23 percent) are employing the AWS Lambda serverless computing framework. It’s clear: serverless is here to stay. The adoption does come with some needed changes, within both application development and operations. That means serverless is also changing the way we leverage public clouds. Truth-be-told, many enterprise IT shops were so happy to get out of the management of physical servers within a data center that many limitations of the existing public IaaS clouds were forgiven. However, now that we’ve lived a few years with public IaaS clouds, developers and CloudOps pros are giving a huge thumbs down to the ...
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, will lead you through the exciting evolution of the cloud. He'll look at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering management. To date, IBM has launched more than 50 cloud data centers that span the globe. He has been building advanced technology, delivering “as a service” solutions, and managing infrastructure services for the past 20 years.
SYS-CON Events announced today that Avere Systems, a leading provider of enterprise storage for the hybrid cloud, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 - Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Avere delivers a more modern architectural approach to storage that doesn't require the overprovisioning of storage capacity to achieve performance, overspending on expensive storage media for inactive data or the overbuilding of data centers to house increasing amounts of storage infrastructure.
SYS-CON Events announced today that TidalScale will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. TidalScale is the leading provider of Software-Defined Servers that bring flexibility to modern data centers by right-sizing servers on the fly to fit any data set or workload. TidalScale’s award-winning inverse hypervisor technology combines multiple commodity servers (including their associated CPUs, memory storage and network) into one or more large servers capable of handling the biggest Big Data problems and most unpredictable workloads.
SYS-CON Events announced today that N3N will exhibit at SYS-CON's @ThingsExpo, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. N3N’s solutions increase the effectiveness of operations and control centers, increase the value of IoT investments, and facilitate real-time operational decision making. N3N enables operations teams with a four dimensional digital “big board” that consolidates real-time live video feeds alongside IoT sensor data and analytics insights onto a single, holistic, display, focusing attention on what matters, when it matters.
With major technology companies and startups seriously embracing Cloud strategies, now is the perfect time to attend 21st Cloud Expo October 31 - November 2, 2017, at the Santa Clara Convention Center, CA, and June 12-14, 2018, at the Javits Center in New York City, NY, and learn what is going on, contribute to the discussions, and ensure that your enterprise is on the right path to Digital Transformation.
Join IBM November 1 at 21st Cloud Expo at the Santa Clara Convention Center in Santa Clara, CA, and learn how IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Cognitive analysis impacts today’s systems with unparalleled ability that were previously available only to manned, back-end operations. Thanks to cloud processing, IBM Watson can bring cognitive services and AI to intelligent, unmanned systems. Imagine a robot vacuum that becomes your personal assistant that knows everything and can respond to your emotions and verbal commands!
Digital transformation is changing the face of business. The IDC predicts that enterprises will commit to a massive new scale of digital transformation, to stake out leadership positions in the "digital transformation economy." Accordingly, attendees at the upcoming Cloud Expo | @ThingsExpo at the Santa Clara Convention Center in Santa Clara, CA, Oct 31-Nov 2, will find fresh new content in a new track called Enterprise Cloud & Digital Transformation.
The dynamic nature of the cloud means that change is a constant when it comes to modern cloud-based infrastructure. Delivering modern applications to end users, therefore, is a constantly shifting challenge. Delivery automation helps IT Ops teams ensure that apps are providing an optimal end user experience over hybrid-cloud and multi-cloud environments, no matter what the current state of the infrastructure is. To employ a delivery automation strategy that reflects your business rules, making real-time decisions based on a combination of real user monitoring, synthetic testing, APM, NGINX / local load balancers, and other data sources, is critical.
Most technology leaders, contemporary and from the hardware era, are reshaping their businesses to do software. They hope to capture value from emerging technologies such as IoT, SDN, and AI. Ultimately, irrespective of the vertical, it is about deriving value from independent software applications participating in an ecosystem as one comprehensive solution. In his session at @ThingsExpo, Kausik Sridhar, founder and CTO of Pulzze Systems, will discuss how given the magnitude of today's application ecosystem, tweaking existing software to stitch various components together leads to sub-optimal solutions. This definitely deserves a re-think, and paves the way for a new breed of lightweight application servers that are micro-services and DevOps ready!
SYS-CON Events announced today that Golden Gate University will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Since 1901, non-profit Golden Gate University (GGU) has been helping adults achieve their professional goals by providing high quality, practice-based undergraduate and graduate educational programs in law, taxation, business and related professions. Many of its courses are taught by faculty actively working in their field of expertise, providing students with skills that can be applied immediately. The new MS in Business Analytics, like most of its programs, is available fully online or in-person in downtown SF.
SYS-CON Events announced today that Ryobi Systems will exhibit at the Japan External Trade Organization (JETRO) Pavilion at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Ryobi Systems Co., Ltd., as an information service company, specialized in business support for local governments and medical industry. We are challenging to achive the precision farming with AI. For more information, visit http://www.ryobi-sol.co.jp/en/.
Enterprises are adopting Kubernetes to accelerate the development and the delivery of cloud-native applications. However, sharing a Kubernetes cluster between members of the same team can be challenging. And, sharing clusters across multiple teams is even harder. Kubernetes offers several constructs to help implement segmentation and isolation. However, these primitives can be complex to understand and apply. As a result, it’s becoming common for enterprises to end up with several clusters. This leads to a waste of cloud resources and increased operational overhead.
SYS-CON Events announced today that Avere Systems, a leading provider of hybrid cloud enablement solutions, will exhibit at SYS-CON's 21st International Cloud Expo®, which will take place on Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA. Avere Systems was created by file systems experts determined to reinvent storage by changing the way enterprises thought about and bought storage resources. With decades of experience behind the company’s founders, Avere got its start in 2008 with a mission to use fast, flash-based storage in the most efficient, effective manner possible. What the team had discovered was a technology that optimized storage resources and reduced dependencies on sprawling storage installations. Launched as the Avere OS, this advanced file system not only boosted performance within standard, on-premises, network-attached storage systems but ...
Microsoft Azure Container Services can be used for container deployment in a variety of ways including support for Orchestrators like Kubernetes, Docker Swarm and Mesos. However, the abstraction for app development that support application self-healing, scaling and so on may not be at the right level. Helm and Draft makes this a lot easier. In this primarily demo-driven session at @DevOpsSummit at 21st Cloud Expo, Raghavan "Rags" Srinivas, a Cloud Solutions Architect/Evangelist at Microsoft, will cover Docker Swarm and Kubernetes deployments on Azure with some simple examples. He will look at Helm and Draft and how they can simplify app development significantly, like app scaling, rollback, etc. Helm is a tool that streamlines installing and managing Kubernetes applications, like the apt/yum/homebrew for Kubernetes. Draft works with pre-provided charts to deploy the apps via Helm.
Containers are rapidly finding their way into enterprise data centers, but change is difficult. How do enterprises transform their architecture with technologies like containers without losing the reliable components of their current solutions? In his session at @DevOpsSummit at 21st Cloud Expo, Tony Campbell, Director, Educational Services at CoreOS, will explore the challenges organizations are facing today as they move to containers and go over how Kubernetes applications can deploy with legacy components, and also go over automated capabilities provided by operators to auto-update Kubernetes with zero downtime for current and secure deployments.