Search notes:

Oracle: X$KTFBUE

Blocks(?) / bitmaps(?) of used extents (i. e. the extent allocation of a segment) of locally managed tablespaces.
When querying x$ktfbue, the returned information is read from the corresponding segment header blocks.

See also

Extent information of dictionary managed tablespaces is stored in fet$ and uet$.
dba_extents
Bug 29275347 seems to indicate that x$ktfbue is skipped when executing dbms_stats.gather_fixed_objects_stats.
Other fixed tables such x$ktfbfe

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1758205148, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/architecture/instance/fixed-tables/k/t/f/b/ue(48): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78