Black Friday falls on 27 November this year. Perhaps a marketing campaign is about to go live, or a post about your business has just gone viral. More visitors can be great news, but only if your website can cope with them.
Your VPS might handle everyday traffic comfortably and still struggle when demand rises sharply. Pages can take longer to load, checkout processes can stall and, in the worst cases, your website may become unavailable just when people want to use it.
The best time to prepare is before the extra visitors arrive. Reviewing how your server performs today can help you identify bottlenecks, decide whether changes are needed and reduce the risk of avoidable disruption. That does not automatically mean buying more resources. Often, understanding what is happening on your VPS is the first and most useful step.
Key takeaways
- Find the bottleneck before you change anything. CPU, RAM, disk I/O and the database each cause slowdowns in different ways.
- Caching helps visitors who are browsing, but basket, checkout, account and search pages still need PHP and database work on every request.
- More resources are not always the answer. On a Layershift Fully Managed VPS, CPU and RAM you add for a busy period can be removed again afterwards.
What causes sudden increases in website traffic?
Some traffic spikes are predictable. Retailers may see more visitors in the run-up to Black Friday and Christmas. A product launch, limited-time offer or email campaign can also bring a concentrated burst of activity.
Other increases are harder to plan for. A news story might mention your business, an influencer might share a product, or a useful article might spread quickly on social media. Visitor numbers can rise in a short period, leaving little time to make changes.
Where you know a busy period is coming, plan ahead. Review your recent performance, check that you can access monitoring information and agree who will respond if problems arise. Preparation is much easier when it is not competing with an active incident.
What happens when your VPS reaches its limits?
A VPS has several resources that work together to serve your website. If one becomes a bottleneck, performance can suffer even when other resources appear to have capacity.
- CPU: The processor handles tasks such as running application code and processing requests. If it is consistently busy, pages and other operations may take longer to complete.
- RAM: Memory holds data and processes that need to be readily available. When memory is insufficient, the server may rely more heavily on slower disk-based swap space, or applications may fail. Our guide to how much RAM a WordPress VPS needs explains what uses memory and how to spot a genuine shortage.
- Disk I/O: This is how quickly the server can read and write data. Storage activity can become a bottleneck when the website or database needs to access lots of data at once.
- Database: More simultaneous requests can mean more database queries. Inefficient queries or a database that is already under pressure can slow down the whole website.
For visitors, the technical cause matters less than the result: slow pages, failed searches, abandoned baskets or an inability to complete a purchase. For a business, that can mean lost revenue, reduced confidence and a poor first impression.
How can you tell if your VPS is ready?
Start with evidence rather than assumptions. Review your server's historical CPU, memory and disk I/O usage, paying particular attention to busy periods. Averages can hide short but important peaks, so look for the highest usage and how long it lasted.
Check whether any resource is already close to its limit, and whether slow responses line up with periods of high usage. It is also worth reviewing application and database performance. A server can have spare CPU capacity while a slow database query or an inefficient application feature still causes delays.
Think about what visitors actually do on your website. The number of simultaneous requests and how much work each one triggers can matter more than the total number of visitors. Page caching can serve product, category and article pages without running PHP or querying the database. Baskets, checkout, account pages and search results are different: they are built for each visitor, so every one of those requests reaches PHP and the database, however good your caching is. A sale where visitors buy, rather than browse, puts far more work on the server than the same number of people reading cached pages.
For an important campaign, consider load testing in advance. A carefully planned test can help show how the site behaves as concurrent demand increases. Test in a controlled way, ideally on a suitable test environment, and make sure the test itself will not disrupt live services.
How to prepare your VPS for increased traffic
A few practical steps can help you prepare:
- Review resource usage. Check CPU, RAM and disk activity during normal and busy periods. Identify the resource, if any, that is limiting performance before deciding what to change.
- Optimise your website. Review caching, database queries, plugins and other code that performs unnecessary work. Reducing the work needed for each page request can help the existing VPS serve more visitors.
- Consider a CDN. A content delivery network can serve suitable static files, such as images, from servers closer to visitors. This can reduce some requests and data transfer handled by your VPS, although it will not remove every source of application or database load.
- Adjust resources where needed. If monitoring shows a genuine CPU, memory or storage constraint, increasing the relevant resource may help. The right change depends on the bottleneck, not on a general assumption that every traffic increase needs a larger server. If you only need the extra capacity for a short peak, check how your host handles scaling back down before you add it.
- Test and monitor. Make changes before the busy period where possible. Check that they have helped, and keep an eye on performance while traffic is high so you can spot emerging problems.
More resources are not always the answer. Better caching or a more efficient database query may deliver a bigger improvement than an upgrade. Equally, optimisation cannot always compensate for a genuine lack of capacity. The aim is to understand the cause and choose the appropriate response.
How Layershift helps you prepare
If you are a Layershift Fully Managed VPS customer, you can ask our team for a free review of your VPS resource usage. We will look at how your server has been performing, help identify likely bottlenecks and recommend changes based on what we find. If the problem sits in your website rather than the server, such as a slow plugin or database query, we will tell you where we would look first. We do not write or change your website's code, but you will not be left to work out the cause on your own.
Where more capacity is the right answer, CPU and RAM can be added before your busy period and removed again once it has passed, so you are not paying for peak capacity all year. Storage can be increased but not reduced, so add only the storage you expect to keep needing. Layershift also provides 24/7 server monitoring and management, helping keep the hosting infrastructure under review while you focus on your website, customers and campaigns.
The goal is not to recommend an upgrade by default. It is to help you make an informed decision about what your website needs.
Don't wait until your website slows down
A traffic spike can be an opportunity for your business, provided your website is ready to handle the demand. Review real server usage, look for bottlenecks and make any necessary changes before a campaign or seasonal peak begins.
You may need additional capacity, or you may get better results from improving caching and application performance. Either way, preparing early gives you more options than troubleshooting under pressure.
Existing Layershift customers: Email am@layershift.com to request a free VPS resource review. The earlier you ask, the more time there is to make and test any changes.
Looking for hosting support? Explore Layershift Fully Managed VPS hosting to see how we can help manage your hosting infrastructure, or read our guide on how to choose a managed VPS hosting provider.
Frequently asked questions
Can I scale my VPS back down after Black Friday?
Yes, on a Layershift Fully Managed VPS. CPU and RAM can be added and removed at any time on your subscription, so you can add capacity for a busy period and take it away afterwards. Storage is the exception: it can be increased but not reduced.
Will a CDN help my checkout cope with more visitors?
Only partly. A CDN can take static files such as images, stylesheets and scripts off your server, which frees up some capacity. Checkout, basket and account pages are built for each visitor, so those requests still reach your server's PHP and database. Treat a CDN as one part of your preparation, not a replacement for checking your server and application.
How far ahead should I prepare for a traffic spike?
As early as you can. You need time to review recent usage, make any changes and check they have helped before visitors arrive. For a known event such as Black Friday or a planned campaign, start weeks rather than days ahead. For an unexpected spike, monitoring and a clear plan for who responds matter more than any last-minute change.
Is the VPS resource review free?
Yes, for Layershift Fully Managed VPS customers. Email am@layershift.com and our team will review how your server is performing and recommend any changes. If the review shows you do not need more resources, we will tell you.