[traverseda]

Wget will exhaust all available ram on a long enough crawl.

[nix23]

No, i crawled many multi-gigabyte sites with my raspberry2 for days.

[traverseda]

I've had memory exhaustion (on a 4GB system) after I think about 600GB in a single crawl. Splitting it into multiple crawls is of course better.

That was a site specifically set up to deal with large collections of files though.