: Because Version 4 UUIDs are completely non-sequential, writing them into standard B-Tree indexing algorithms causes heavy page-splitting. This degrades write throughput. If transactional write speed is a critical metric for your infrastructure, consider utilizing ULIDs (Universally Unique Lexicographically Sortable Identifiers) or UUID Version 7 , which embed a time-based prefix before the random block to guarantee sequential indexing. How to Generate a Similar Identifier in Programming
import uuid my_uuid = uuid.uuid4() print(my_uuid) # e.g., 5a82f65b-9a1b-41b1-af1b-c9df802d15db 5a82f65b-9a1b-41b1-af1b-c9df802d15db
The next 4 characters represent the middle 16 bits of the timestamp. 41b1 : Because Version 4 UUIDs are completely non-sequential,
5a82f65b-9a1b-41b1-af1b-c9df802d15db appears to be a unique internal identifier, likely associated with a specific digital asset, product entry, or database record. How to Generate a Similar Identifier in Programming
While identifiers like 5a82f65b-9a1b-41b1-af1b-c9df802d15db offer excellent distribution properties, storing them incorrectly can degrade database performance.
With Version 4 UUIDs, the mathematics protect you. The system allows for 21222 to the 122nd power