In praise of memcached
jchri.st
June 23, 2026
4 min read
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60/100
Summary
Memcached is a high-performance, distributed memory caching system that is often considered for use in infrastructure management. It provides a simpler alternative to Redis, focusing on caching capabilities without the additional features that Redis offers.
Key Takeaways
- Memcached is a free and open-source, high-performance distributed memory object caching system designed to speed up dynamic web applications by reducing database load.
- Memcached handles downtime gracefully by allowing client libraries to ignore connection exceptions, returning default values instead.
- Memcached's architecture simplifies clustering by allowing client libraries to configure multiple URLs and manage node connections without built-in clustering features.
- Memcached does not persist data to disk, making it a suitable choice for stateless workloads and alleviating concerns about data persistence.
Community Sentiment
Positives
- Memcached's lightweight design allows for easy integration into stacks, making it a straightforward choice for caching.
- Dealing with memcached downtime is incredibly easy, as client libraries generally ignore connection issues, enhancing reliability.
Concerns
- Redis is often misused as a persistent data store, which leads to confusion and operational issues, highlighting a common misconception among developers.
- The complexity of managing memcached's slab pools can be a significant drawback compared to the simplicity of Redis, making it less appealing for modern applications.