UUIDv4 Is Not Free: Why Random Primary Keys Are Silently Crushing Your Write Performance

When my database write latency spiked by 340% after crossing 50 million rows, my CPU wasn't maxed out. My queries weren't missing indexes. Instead, my storage IOPS was completely saturated by a single architectural default I set up on day one: using UUIDv4 as my primary key. Most backend engineers avoid auto-incrementing integers (BIGINT / SERIAL)... Weiterlesen: UUIDv4 Is Not Free: Why Random Primary Keys Are Silently Crushing You…