Search notes:

v$archive_dest_status

On a (data guard) Primary database[primary database, this view can be used to check wheather there are redo transport errors or redo gaps on one of the standby databases:

select
  status,     -- should be VALID
  gap_status  -- should be NOGAP
from
  v$archive_dest_status
where
  dest_id = 4;

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...', 1758205629, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/installed/dynamic-performance-views/archive_dest/status/index(43): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78

v$archive_dest_status

See also