Oracle Archive Block Size
How to Check Archive Block Size ? To monitor the applying performance of a standby database, we usually make a query on V$MANAGED_STANDBY like this:… Read More »Oracle Archive Block Size
Redo Log Files
How to Resolve ORA-01156: recovery or flashback in progress may need access to files
ORA-01156 Tried to add a standby log file to a database, but it failed with ORA-01156. SQL> alter database add standby logfile thread 1 group… Read More »How to Resolve ORA-01156: recovery or flashback in progress may need access to files
Truncate vs Delete in Oracle
Truncate vs Delete Here I compare the differences between TRUNCATE and DELETE an entire table in the following chart. Question Truncate Table Delete From DDL… Read More »Truncate vs Delete in Oracle
How to Move Redo Log Location in Oracle
Rename Redo Log File To improve overall performance, sometimes, we may consider to move redo logs to the location with faster disks, like Solid-State Drive… Read More »How to Move Redo Log Location in Oracle
How RMAN Duplicate 19c Standby Database
You don't have to create an empty database on the standby server for building a standby database. In this post, I will show you how… Read More »How RMAN Duplicate 19c Standby Database
How to Resolve ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
Found ORA-19602 When I tried to backup a NOARCHIVELOG database in MOUNT state, I got ORA-19602 like the following case: RMAN> startup mount; ... RMAN>… Read More »How to Resolve ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
How to Move Oracle Database
Actually, this topic "How to Move Oracle Database" follows my previous post: How to Move ORACLE HOME. But I think it can be used in… Read More »How to Move Oracle Database
How to Resize Redo Logs in Oracle
Increase Redo Log Size The default size of redo logs during installation is 50MB which is too small for production databases. Of course, you can… Read More »How to Resize Redo Logs in Oracle
Where to Change Redo Logs in DBCA or OUI
The default size of redo log files is 50MB or 200MB during database creation. It could be too small for databases with high volume transactions… Read More »Where to Change Redo Logs in DBCA or OUI
When Database is Not Consistent
There are several different kinds of situation when you recover a database with inconsistent states among files. In the following, I have to assume that… Read More »When Database is Not Consistent