Speed Index
Speed Index explained: how this page speed metric measures how fast visible content appears, how it is calculated and why lower values are better.
Knowledgebase
Clear answers to common hosting questions, written by our editors.
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By Maarten Soetens
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Remote Database Access
Remote MySQL lets computers outside the server reach a database over the network. Compare localhost and remote access, and the security trade-offs.
By Maarten Soetens
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Structured Data
Structured data labels what a page contains, such as a product, an article or an event. Learn how schema markup makes that meaning clear to search engines.
By Maarten Soetens
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Permalinks Explained
What is a permalink? It is the permanent address of a page or post. Learn how CMS permalink structures work and how changing them affects links.
By Maarten Soetens
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Exchange vs IMAP
Exchange vs IMAP explained: Microsoft Exchange syncs mail, calendars and contacts together, while IMAP covers mail folders only. Learn the difference.
By Maarten Soetens
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What Is PUE
Power usage effectiveness (PUE) explained: how the ratio is calculated, what good values look like and the blind spots to note when comparing facilities.
By Maarten Soetens
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PHP Mail vs SMTP
PHP mail vs SMTP: why email sent through PHP's mail() function often fails authentication and lands in spam, and how authenticated SMTP improves delivery.
By Maarten Soetens
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Redis vs Memcached
Redis vs Memcached compared for caching: data types, persistence, memory use and typical hosting use. Learn which in-memory cache suits which sites.
By Maarten Soetens
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TXT Record
A TXT record stores free-form text in DNS. Learn what TXT records hold, how they are used to prove domain ownership and why anyone can read them.
By Maarten Soetens
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Cache Invalidation
Cache invalidation marks stored copies as out of date so visitors get fresh content. Learn the strategies, from expiry times to tags and versioned addresses.
By Maarten Soetens
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Image Optimization
Image optimization reduces file size through the right dimensions, format and compression. Learn how it affects page weight and Largest Contentful Paint.
By Maarten Soetens
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Live Migration of VMs
Live migration moves a running virtual machine to another host with little or no downtime. Learn how memory pre-copy works and why hosts rely on it.
By Maarten Soetens