New Groups Subscription Methods
Gnus normally determines whether a group is new or not by comparing the
list of groups from the active file(s) with the lists of subscribed and
dead groups. This isn't a particularly fast method. If
ask-server, Gnus will ask the
server for new groups since the last time. This is both faster and
cheaper. This also means that you can get rid of the list of killed
groups altogether, so you may set
nil, which will save time both at startup, at exit, and all over.
Saves disk space, too. Why isn't this the default, then?
Unfortunately, not all servers support this command.
I bet I know what you're thinking now: How do I find out whether my
ask-server? No? Good, because I don't have a
fail-safe answer. I would suggest just setting this variable to
ask-server and see whether any new groups appear within the next
few days. If any do, then it works. If none do, then it doesn't
work. I could write a function to make Gnus guess whether the server
ask-server, but it would just be a guess. So I won't.
telnet to the server and say
HELP and see
whether it lists `
NEWGROUPS' among the commands it understands. If
it does, then it might work. (But there are servers that lists
NEWGROUPS' without supporting the function properly.)
This variable can also be a list of select methods. If so, Gnus will
ask-server command to each of the select methods, and
subscribe them (or not) using the normal methods. This might be handy
if you are monitoring a few servers for new groups. A side effect is
that startup will take much longer, so you can meditate while waiting.
Use the mantra ``dingnusdingnusdingnus'' to achieve permanent bliss.