Oracle Privilege Analysis in action

As Oracle has quite recently announced that Privilege Analysis is now included with the Oracle Database Enterprise Edition licence, I played a little bit with this cool feature to solve infamous ORA-01031: Insufficient privileges error. You can read results of my investigation in the article inside new issue of UKOUG magazine called #PTK (former Oracle Scene): ORA-01031: Insufficient privileges. Enjoy!

Advertisements

Cross-endian Oracle migration – moving user data – part II

In my previous post I shared some findings on migrating user and application data between platforms with different endianness, focusing on problems with reducing downtime.

Today I’ll talk more about the complexity of chosen method. It’s not only about complexity per se, it’s rather about the possibility to automate as much as possible in order to allow efficient migration of a big number of databases.

Continue reading “Cross-endian Oracle migration – moving user data – part II”

Cross-endian Oracle migration – moving user data – part I

One can find a lot of sources and materials regarding migrating Oracle databases between platforms having different endianness, even though the choice of possible methods is limited in this case. On paper (slides?) everything looks fine, but then you hit bugs or environment-specific problems. Moreover, in real life the situation is always more complex than moving just one tablespace with just one datafile as shown in many places as an example. Today I would like to add my 2 cents into this topic, focusing on moving user and application data.

Continue reading “Cross-endian Oracle migration – moving user data – part I”

Fast Recovery Area space usage threshold

Using Fast Recovery Area to let Oracle automatically manage the backup/flashback/recovery related files is very useful, but avoiding problems related with FRA free space shortage requires careful planning. There are several factors that have to be taken into account, apart from the most obvious like DB_RECOVERY_FILE_DEST_SIZE parameter, there are some additional ones depending on the type of files stored. For example DB_FLASHBACK_RETENTION_TARGET (and _MINIMUM_DB_FLASHBACK_RETENTION) affecting flashback logs or archived logs deletion policy which is also taken into account while reclaimable files purging is done.

Continue reading “Fast Recovery Area space usage threshold”

Redo Transport from Oracle 11.2 to 12.2 and SYS password case-sensitivity problems

Case-sensitive passwords were introduced in Oracle Database 11g, causing some misunderstanding and introducing quite a lot of annoying problems for DBAs, even though it was really required to bring level of Oracle’s security to 21st century standards ;). Since then, even more changes were introduced, including for example deprecation of SEC_CASE_SENSITIVE_LOGON database parameter, IGNORECASE argument of ORAPWD tool or password file format change in 12c.

Continue reading “Redo Transport from Oracle 11.2 to 12.2 and SYS password case-sensitivity problems”

Migrating from Windows to Linux with Active Duplicate for standby – problem with 11.2.0.4

Recently I was working on migrating Oracle 11.2.0.4 database running on Windows, to new hardware infrastructure on Linux. This Oracle version is with us for quite a long time, plus migration from Windows to Linux is quite common (fortunately in that direction…;)), so when I got an error while trying to use Active Duplicate feature to create a standby database, I was quite sure I’ll be able to quickly find the solution either in MOS or elsewhere. Indeed, I found several blog posts with exactly the same error, but solution mentioned there was not working for me.

Continue reading “Migrating from Windows to Linux with Active Duplicate for standby – problem with 11.2.0.4”