Redis Persistence and Memory Management: RDB, AOF, fsync, Fork Cost, maxmemory and Big/Hot Keys
The official redis:8 image takes only periodic RDB snapshots by default; if the container dies with SIGKILL everything after the last snapshot is gone, while with AOF everysec no order was lost in the measurement. With real output: fork and copy-on-write cost, turning on AOF without losing data, Redis 8.10's BACKUP command, noeviction protecting a stream, OOMKilled, UNLINK, HOTKEYS and the activedefrag threshold.
14 Nov 2026
·
11 min
·
11
