The single-threaded event loop is what makes the 'just a cache' framing fall apart: no locking on the hot path is exactly why latency stays flat under load, and it is also why one slow command like KEYS can stall every other client. The constraint and the strength are the same design choice.
Exactly! The same design choice that makes Redis fast also creates its biggest limitation. No lock contention keeps command execution efficient, but a single blocking operation can delay everyone else. Understanding that trade-off is key to using Redis effectively.
Abhinav Sharma
Founder of Impact Gate. See who breaks before you change an API.
The single-threaded event loop is what makes the 'just a cache' framing fall apart: no locking on the hot path is exactly why latency stays flat under load, and it is also why one slow command like KEYS can stall every other client. The constraint and the strength are the same design choice.