| [cacheSizeBytes](./firestore_.firestoresettings.md#firestoresettingscachesizebytes) | number | NOTE: This field will be deprecated in a future major release. Use <code>cache</code> field instead to specify cache size, and other cache configurations.<!-- -->An approximate cache size threshold for the on-disk data. If the cache grows beyond this size, Firestore will start removing data that hasn't been recently used. The size is not a guarantee that the cache will stay below that size, only that if the cache exceeds the given size, cleanup will be attempted.<!-- -->The default value is 40 MB. The threshold must be set to at least 1 MB, and can be set to <code>CACHE_SIZE_UNLIMITED</code> to disable garbage collection. |
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