How do I shrink the size of my Rollback Tableapce?

[sln81]

Try these two commands.

First find out the the active number of extents in each rollback segment and shrink the rollback segments

1. Alter Rollback segment r1 shrink to nn m;

After shrinking the rollback segments like this,

2. Alter database datafile 'rbs.dbf' resize 1024M;