Performed by CacheDelete, it first looks at a wide range of macOS caches, and only at the end purges snapshots, to free up space when it runs short.
AssetCache
Details of how the Content Caching server handles a cache macOS security data update, and both client and server handle an App Store update.
Using Activity Monitor and command tools to assess performance of a content caching server, and diagnosing problems from the log.
The Eclectic Light Company 