Caching Without Marshal
summary
Migrates Rails cache off Marshal to MessagePack and shows concrete results: builds a MessagePack-based serializer with 128 extension slot strategy, an ActiveRecord coder that preserves loaded associations and handles circular references, and a fallback object protocol for custom types. Records shrink from ~1600–4000 bytes down to ~300 bytes (≈13x improvement), memcache fill percent drops, and a six-month dual-write rollout finishes with Marshal fully removed. Uses MessagePack Ruby, Snappy compression, and the paquito gem.
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chapters (9)
- 0:00Introduction
- 2:27Rails caching problems
- 11:50Marshall like sorcerer's apprentice
- 12:55MessagePack alternative
- 20:36Migration to MessagePack
- 22:01ActiveRecord caching with MessagePack
- 25:30Production performance gains
- 27:37Edge cases handling
- 29:20Removing Marshall from cache
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