[rt-users] clean up user table

[Gordon Messmer]

Todd Chapman wrote:
> Are you having preformance problems related to the users? If not why
> clean it up? Do you like to play with fire?
>   

Yes, I am.  RT3 makes multiple queries per ticket displayed that join 
the very large principals and cachedgroupmembers tables.  It causes 
tickets to display somewhat slowly.  There's a small but notable delay 
with RT3 3.6.5 and Pg 8.1.  The delay was intolerably long with some 
earlier minor revision of 3.6 and MySQL 5.0.

I'm tired of running into these problems when I update some component of 
the system, and would like to prune out the tens of thousands of "user" 
records created by spam through the mail gateway.  I'd be grateful for 
any help that the list can offer.