online file database

A friend and I talked to a case, a tablespace originally had a data file (already has a lot of data entered), then he added 7 data files, this time he found that he added more files, want to delete these data files, but do not understand the

Oracle Online redo log files (online redo log fileAlmost all of the internal changes that occur in Oracle are recorded in the online redo log file, and Oracle uses these redo log groups to recover the database, so they are very important.The main

Online redo log files are used to cycle through all operations of the Oracle database and are almost always read-write, so it is meaningless to back up the online redo log files at some point in time, and to restore them at all. The Rman backup does

For oracle restoration, the most important data structure is onlineredolog (online redo log). Online redo log contains at least two pre-allocated files used to store database changes. Online redo logs record changes in data files. What is the role

Almost all changes that occur in oracle online redo log files are recorded in online redo log files. oracle uses these redo log groups to restore the database, therefore, they are very important. The main work of online redo log files is to back up

Overview of the Online Redo Log, overviewredo For oracle restoration, the most important data structure is the online redo log (online redo log). The online redo log contains at least two pre-allocated files used to store database changes. Online

Changing the size and quantity of online redo log files sometimes optimizes the database. You can add or delete online redo log groups or log members in the primary database without affecting the standby database. Similarly, you Changing the size

A similar warning was found while looking at a client's database recovery log (File #N is offline, but was part of a online tablespace.), not previously noticed, this time by experimenting to reproduce the contentCreate a table spacesql> Create

8.3.5AddingorDroppingOnlineRedoLogFiles8.3.5 add or delete the current redo log file metadata. Youcanaddordroponlineredologfilegroupsormembersto 8.3.5 Adding or Dropping Online Redo Log Files 8.3.5 add or delete the current redo log file Changing

Querying online log files sql> col member for a50sql> select group#,status,type,member  From v$logfile;       group# status    ts  type         member---------- --------- --------- ------ --------------------------------------------------          3