Welcome!

PHP Authors: Liz McMillan, Carmen Gonzalez, Hovhannes Avoyan, Lori MacVittie, Trevor Parsons

Related Topics: Java IoT, Microservices Expo, Machine Learning , PHP, Agile Computing, @DXWorldExpo

Java IoT: Article

Make PHP Requests “Sleep” to Stop Bad Behavior. Smart or Not?

The Bad Behavior Plugin does a good job of preventing these bots from posting spam messages

In a previous post we showed how we hooked up our blog's WordPress application with the new Compuware APMaaS offering. Since WordPress is a PHP application we use PurePath for PHP to monitor it. We highlighted that we got an alert about a response time violation on some of our blog posts - which is shown in the following screenshot.

Dynamic Baselining detects a significant violation of the baseline during a 4.5 hour period last night

In this follow-up article I want to show you how we get to the root cause of this problem which turns out to be a third-party WordPress PHP plugin that detects Bad Requests including requests from Bots that try to put spam messages in blog comments.

Step 1: See PHP Performance Hotspots
For the selected time-frame, we open the Response Time Hotspot dashboard. This shows which layer of the PHP Application has the highest performance contribution.

The high-level performance hotspot shows that most of the time is spent in core PHP functionality.

Step 2: Pinpoint the problematic method
A click on the PHP layer shows us that the Sleep function is the biggest contributor to this performance hotspot:

Turns out it is the Sleep function that gets called from one of the plugins we use to identify Bad Requests.

Step 3: Identify the actual request
Let's have a look at one of the transactions where we get to see where the sleep method is actually called:

We see where the plugin detects the bad behavior and also the log message it writes to MySQL.

We also get access to the web request details such as IP Address, User Agent or actual URL and Query String:

The details show origin information about this bad request, e.g: IP, User Agent, URL and Query String

Analysis: Lots of Bad Requests reduces WordPress performance
The Bad Behavior Plugin does a good job in preventing these bots from posting spam messages. What's interesting though is their approach of putting the request to sleep for two seconds. If we have a lot of parallel bad requests we have a lot of threads that are blocked in wait. This will impact "real" users who want to access the blog as the web server might not have any available active threads. A different approach would help. If you have a suggestion for a better way to handle bad requests to avoid the blocked threads issue, let us know in the comments.

If you want to know more about performance management for PHP check out the blog from Klaus on Exploring the PHP World with PurePath Technology. If you are an existing Compuware APM Customer check out our dynaLearn Webinar on First Steps with PurePath for PHP.

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 (1)

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.


IoT & Smart Cities Stories
Moroccanoil®, the global leader in oil-infused beauty, is thrilled to announce the NEW Moroccanoil Color Depositing Masks, a collection of dual-benefit hair masks that deposit pure pigments while providing the treatment benefits of a deep conditioning mask. The collection consists of seven curated shades for commitment-free, beautifully-colored hair that looks and feels healthy.
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
The textured-hair category is inarguably the hottest in the haircare space today. This has been driven by the proliferation of founder brands started by curly and coily consumers and savvy consumers who increasingly want products specifically for their texture type. This trend is underscored by the latest insights from NaturallyCurly's 2018 TextureTrends report, released today. According to the 2018 TextureTrends Report, more than 80 percent of women with curly and coily hair say they purcha...
We all love the many benefits of natural plant oils, used as a deap treatment before shampooing, at home or at the beach, but is there an all-in-one solution for everyday intensive nutrition and modern styling?I am passionate about the benefits of natural extracts with tried-and-tested results, which I have used to develop my own brand (lemon for its acid ph, wheat germ for its fortifying action…). I wanted a product which combined caring and styling effects, and which could be used after shampo...
The platform combines the strengths of Singtel's extensive, intelligent network capabilities with Microsoft's cloud expertise to create a unique solution that sets new standards for IoT applications," said Mr Diomedes Kastanis, Head of IoT at Singtel. "Our solution provides speed, transparency and flexibility, paving the way for a more pervasive use of IoT to accelerate enterprises' digitalisation efforts. AI-powered intelligent connectivity over Microsoft Azure will be the fastest connected pat...
There are many examples of disruption in consumer space – Uber disrupting the cab industry, Airbnb disrupting the hospitality industry and so on; but have you wondered who is disrupting support and operations? AISERA helps make businesses and customers successful by offering consumer-like user experience for support and operations. We have built the world’s first AI-driven IT / HR / Cloud / Customer Support and Operations solution.
Codete accelerates their clients growth through technological expertise and experience. Codite team works with organizations to meet the challenges that digitalization presents. Their clients include digital start-ups as well as established enterprises in the IT industry. To stay competitive in a highly innovative IT industry, strong R&D departments and bold spin-off initiatives is a must. Codete Data Science and Software Architects teams help corporate clients to stay up to date with the mod...
At CloudEXPO Silicon Valley, June 24-26, 2019, Digital Transformation (DX) is a major focus with expanded DevOpsSUMMIT and FinTechEXPO programs within the DXWorldEXPO agenda. Successful transformation requires a laser focus on being data-driven and on using all the tools available that enable transformation if they plan to survive over the long term. A total of 88% of Fortune 500 companies from a generation ago are now out of business. Only 12% still survive. Similar percentages are found throug...
Druva is the global leader in Cloud Data Protection and Management, delivering the industry's first data management-as-a-service solution that aggregates data from endpoints, servers and cloud applications and leverages the public cloud to offer a single pane of glass to enable data protection, governance and intelligence-dramatically increasing the availability and visibility of business critical information, while reducing the risk, cost and complexity of managing and protecting it. Druva's...
BMC has unmatched experience in IT management, supporting 92 of the Forbes Global 100, and earning recognition as an ITSM Gartner Magic Quadrant Leader for five years running. Our solutions offer speed, agility, and efficiency to tackle business challenges in the areas of service management, automation, operations, and the mainframe.