What causes "Lightroom Catalog Size Huge After Denoise (lrcat-data)"?

Denoise, Raw Details and Super Resolution data stored per photo in .lrcat-data (Classic) Applying or syncing presets that include Denoise to many photos Denoise data can't be deleted from .lrcat-data afterwards With XMP writing on, sidecars also grow

How do I fix "Lightroom Catalog Size Huge After Denoise (lrcat-data)"?

1. Apply Denoise only to final picks: Cull first, then Denoise the photos you'll actually deliver Avoid presets or Sync Settings that include Denoise/Super Resolution for whole shoots 2. Keep the catalog folder on a large, fast drive: Make sure the drive holding the catalog has space for the .lrcat-data growth Keep catalog backups on a separate drive and delete old backups regularly 3. Check catalog health after updates: In Classic 15.5+, accept the startup prompt if Lightroom offers to repair .lrcat-data Delete the recovery backup only after confirming edits are intact

Try or Bye

Browse all analyzed products with real user feedback patterns.

Lightroom Catalog Size Huge After Denoise (lrcat-data)

Ongoing Mac, Windows Updated October 21, 2026

Quick answer

Since Denoise, Raw Details and Super Resolution moved into the Detail panel, their data is stored in the .lrcat-data file next to the catalog. Bulk Denoise can grow it by gigabytes, and the data can't be pruned later, so apply AI enhancements only to keepers.

Most likely fix: Apply Denoise only to final picks.

Symptoms

The .lrcat-data file or catalog folder grows by many gigabytes, backups take much longer, or XMP sidecars grow to around 10 MB each.

Why it happens

Denoise, Raw Details and Super Resolution data stored per photo in .lrcat-data (Classic)
Applying or syncing presets that include Denoise to many photos
Denoise data can't be deleted from .lrcat-data afterwards
With XMP writing on, sidecars also grow

How to fix it

Try these in order — the most common fix is first.

1. Apply Denoise only to final picks
1. Cull first, then Denoise the photos you'll actually deliver
2. Avoid presets or Sync Settings that include Denoise/Super Resolution for whole shoots
2. Keep the catalog folder on a large, fast drive
1. Make sure the drive holding the catalog has space for the .lrcat-data growth
2. Keep catalog backups on a separate drive and delete old backups regularly
3. Check catalog health after updates
1. In Classic 15.5+, accept the startup prompt if Lightroom offers to repair .lrcat-data
2. Delete the recovery backup only after confirming edits are intact

This guide also covers

lightroom catalog size huge
lrcat-data file large
lightroom denoise catalog size
lightroom catalog growing

Still not working?

If Adobe Lightroom keeps failing, you're not alone. See every Adobe Lightroom problem users report or the alternatives people switch to.

Other Adobe Lightroom errors