Caching on the Server: Redis and Why It Speeds Things Up
Some answers are expensive to work out but rarely change. Caching stores those answers somewhere very fast so the next request gets them instantly instead of recalculating from scratch.
Redis is a popular in-memory store we use for this. By keeping hot data in memory rather than on disk, it can shave seconds off page loads and dramatically reduce database load.
What We Cache
- Results of slow database queries.
- Rendered fragments of a page.
- Session data for logged-in users.
- Counts and dashboards that update periodically.
The Catch: Keeping It Fresh
Cached data can go stale. The real skill is deciding how long to keep each item and clearing it the moment the underlying data changes, so visitors never see outdated information.
The Business Payoff
Faster pages improve conversions and search rankings, and caching lets you serve more visitors on the same hardware — a direct saving on infrastructure.
If you need a hand with any of this, your Progressive Robot delivery team is ready to help. Raise a ticket from the Support area of your client portal or speak to your account manager and we will guide you through the next steps.