Most FooStatistics entries in the man page don't mention ExtraInfo descriptors
ConnDirectionStatistics 0|1 When this option is enabled, Tor writes statistics on the bidirectional use of connections to disk every 24 hours. (Default: 0) HiddenServiceStatistics 0|1 When this option is enabled, a Tor relay writes obfuscated statistics on its role as hidden-service directory, introduction point, or rendezvous point to disk every 24 hours. If ExtraInfoStatistics is also enabled, these statistics are further published to the directory authorities. (Default: 0) ExtraInfoStatistics 0|1 When this option is enabled, Tor includes previously gathered statistics in its extra-info documents that it uploads to the directory authorities. (Default: 1)
Most of the man page entries for FooStatistics are like ConnDirectionStatistics -- they just talk about writing to disk. Then tucked away elsewhere is this ExtraInfoStatistics thing that says "previously gathered statistics".
It sounds like we should make much clearer that some of these go into the extrainfo descriptor and get published to the outside world?
And are there some of them that don't get published to the outside world? It's not immediately obvious from looking at the code.