mass unsubscribe is far to slow

[Lkoeller]

We have mailing lists with more than 20000 members, an
the
subscription of an empty list is very fast (<2 min).

When we try to delete this list with

..../bin/remove_members -a listname

it took several hours. We stop it after 14 min where
still more than
19000 users are subscribed.

My currently workaround is to set the arrays

members
passwords
user_options

per config_list to nil. This only took 7 seconds. A new
fill of the list
is still as fast as above after this.

Is it possible to handle the -a flag in remove_members
in a special case
for speed up?

Thanks and best regards

Lars

[http://sourceforge.net/tracker/index.php?func=detail&aid=498953&group_id=103&atid=100103]

[Barry Warsaw (barry)]

This is caused by the self.Save() in MailList.py's
DeleteMember() method. In 2.0.x Mailman tries to save the
list database after each member is deleted instead of doing
all the deletes first and then saving the list.

Sadly, I will likely not fix this in the 2.0.x series. It
is already fixed in Mailman 2.1.