What is cache size measured in?

Question

Are the units for the Cache Size setting in QGIS bytes, KB, Mb or MB?

When I look in the directory specified by the path (/Users/.../.qgis/cache/) the cache folder is just 6KB.

Answer 1

Byte (see QNetworkDiskCache::setMaximumCacheSize).

The cache is mainly used for WMS-C/WMTS - so you're probably not using that.