{
  "slug": "fuzzy-checkpoint",
  "term": "Fuzzy checkpoint",
  "aliases": [],
  "definition": "A fuzzy checkpoint records recovery information while transaction processing continues, rather than freezing all activity into one instantaneous database image.",
  "note": "In ARIES, the checkpoint records transaction and dirty-page information without forcing dirty pages to storage. Recovery may need older log records. This is neither a backup nor permission to delete every pre-checkpoint log record.",
  "status": "shipping",
  "advantages": [],
  "limitations": [],
  "related": [
    "database-checkpoint",
    "write-ahead-log"
  ],
  "supersedes": [],
  "supersededBy": [],
  "firstSeen": null,
  "lastSeen": null,
  "citations": [
    {
      "id": "aries",
      "title": "Mohan, Haderle, Lindsay, Pirahesh and Schwarz. ARIES. ACM TODS 17(1), 1992, pp. 121-122, section 5.4.",
      "url": "https://www.cs.cmu.edu/~15849g/readings/mohan92.pdf",
      "accessed": "2026-10-12"
    },
    {
      "id": "hesela-wal",
      "title": "WAL, checkpoints and torn pages: three different recovery guarantees",
      "url": "https://hesela.com/analyses/wal-checkpoints-torn-pages/",
      "accessed": "2026-10-12"
    }
  ],
  "updated": "2026-10-12"
}