This article explains why the KEYS command is unsafe for large Redis keyspaces, introduces the SCAN command and multithreaded scanning techniques, compares performance, and offers alternative counting strategies to reliably count hundreds of millions of keys.
This article explains why the KEYS * command is dangerous for large Redis deployments and presents several practical alternatives—including SCAN, multithreaded SCAN, cluster‑wide parallel scans, built‑in counters, and real‑time incremental counting—along with code samples, performance comparisons, and guidance on choosing the right solution.
This article explains why the KEYS command is dangerous for large keyspaces, introduces the SCAN command and its multithreaded variants, discusses distributed counting strategies, compares built‑in counters and real‑time incremental approaches, and provides guidance on selecting the best solution for your Redis deployment.
