You might be missing all your previews, or you might start getting error messages during operations that require or generate previews, such as when importing new images. There are a few reasons why you might want to clear your cache.Ī corrupted cache can cause weird behavior in Lightroom. Unlike the Preview cache that gets used for all images, Smart Previews are only created when you tell Lightroom to create them so not every image is represented. New to Lightroom 5 are Smart Previews that allow for offline editing of images. Lightroom uses previews to display thumbnails in many places, and it keeps cached versions of these previews in its preview cache. Similar to the Camera Raw cache, Lightroom maintains a video cache to help with the performance of viewing and manipulating video files.
The process is a little faster if the original image data is in the Camera Raw cache, so Lightroom checks there first to see if it can skip some of the raw processing. When you view or edit raw images in the Develop module, Lightroom will generate previews using the original image data and then updating the preview for any processing or adjustments that have been applied.
There are four primary types of cache that Lightroom uses: camera raw, video, preview, and Smart Preview.
#Empty cache for adobe acrobat on mac how to#
This post will explain the different types of cache, why you might want to purge it, and how to do it. Occasionally, something goes wrong with the management of the cache and it becomes necessary to clear or purge it. Like many applications, Lightroom uses cache to make things run faster.
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