You See Multiple Extents In The Temporary Tablespace. Is This A Problem?

In A System With An Average Of 40 Concurrent Users You Get The Following From A Query On Rollback Extents:
rollback Cur Extents
r01 11
r02 8
r03 12
r04 9
system 4
you Have Room For Each To Grow By 20 More Extents Each. Is There A Problem? Should You Take Any Action?

You Look At The Dba_rollback_segs View And See That You Have A Large Number Of Wraps Is This A Problem?

You Look At The Dba_rollback_segs View And See That There Is A Large Number Of Shrinks And They Are Of Relatively Small Size, Is This A Problem? How Can It Be Fixed If It Is A Problem?

If You See The Value For Reloads Is High In The Estate Library Cache Report Is This A Matter For Concern?

If You See A Pin Hit Ratio Of Less Than 0.8 In The Estate Library Cache Report Is This A Problem? If So, How Do You Fix It?

What Can Cause A High Value For Recursive Calls? How Can This Be Fixed?

You See The Following On A Status Report:
redo Log Space Requests 23
redo Log Space Wait Time 0
is This Something To Worry About? What If Redo Log Space Wait Time Is High? How Can You Fix This?

How Can You Tell If A Tablespace Has Excessive Fragmentation?

If A Tablespace Shows Excessive Fragmentation What Are Some Methods To Defragment The Tablespace? (7.1,7.2 And 7.3 Only)