Entries tagged as Oracle DBA

Advantages of operating a database in ARCHIVELOG mode over operating it in NO ARCHIVELOG mode

On June 23, 2009 / By admin / In Oracle DBA / No Comments
What are the advantages of operating a database in ARCHIVELOG mode over operating it in NO ARCHIVELOG mode ?   Complete database recovery from disk failure is possible only in ARCHIVELOG mode. Online database backup is possible only in ARCHIVELOG mode. Read More...

Full Backup when the database is open

On June 23, 2009 / By admin / In Oracle DBA / No Comments
Can Full Backup be performed when the database is open ?   No. Read More...

Undocumented commands in Oracle

On June 22, 2009 / By admin / In Oracle DBA / No Comments
Are there any undocumented commands in Oracle?   Sure there are, but it is hard to find them. Look at these examples: From Server Manager (Oracle7.3 and above): ORADEBUG HELP It looks like one can change memory locations with the ORADEBUG POKE command. Anyone brave enough to test this one for us? Previously this functionality was available with ORADBX Read More...

Use ORADEBUG from Server Manager

On June 22, 2009 / By admin / In Oracle DBA / No Comments
How does one use ORADEBUG from Server Manager/ SQL*Plus?   Execute the “ORADEBUG HELP” command from svrmgrl or sqlplus to obtain a list of valid ORADEBUG commands. Look at these examples: SQLPLUS> REM Trace SQL statements with bind variables SQLPLUS> oradebug setospid 10121 Oracle pid: 91, Unix process pid: 10121, image: oracleorcl SQLPLUS> oradebug EVENT 10046 trace name context forever, level Read More...