Databases & System Design•Part 4: In-Memory Caching & Fast Data Stores (Redis) (41 - 50)
Why single-threaded Redis handles 100k+ ops/sec:
In Simple Words:
- In-Memory: Operations run in RAM, bypassing slow disk I/O.
- Single-Threaded: Zero lock contention, zero thread context-switching, and no race conditions.
- I/O Multiplexing (
epoll): Non-blocking event loop handles thousands of connections on a single thread.
bash
# Benchmark Redis throughput locally:
redis-benchmark -q -n 100000 -c 50 -P 16
# Output: PING_INLINE: 220,000 requests per second
# SET: 185,000 requests per second