Compress the database

Question

Hi all,
i want to know, how can i compress my database? Can i delete .trc File? Please help!
thank you very much and greeting from germany!
rabbit

Answer 1

There are 3 locations where the traces files are stored. With this information you will be able to know what are the purpose of trace files and where they are located.
BACKGROUND_DUMP_DEST
Parameter type
String
Syntax
BACKGROUND_DUMP_DEST = {pathname | directory}
Default value
Operating system-dependent
Parameter class
Dynamic: ALTER SYSTEM
Range of values
Any valid local path, directory, or disk
BACKGROUND_DUMP_DEST specifies the pathname (directory or disc) where debugging trace files for the background processes (LGWR, DBWn, and so on) are written during Oracle operations.
An alert file in the directory specified by BACKGROUND_DUMP_DEST logs significant database events and messages. Anything that affects the database instance or global database is recorded here. The alert file is a normal text file. Its filename is operating system-dependent. For platforms that support multiple instances, it takes the form alert_sid.log, where sid is the system identifier. This file grows slowly, but without limit, so you might want to delete it periodically. You can delete the file even when the database is running.
See Also:
Oracle9i Database Administrator's Guide for more information on setting this parameter and on alert files
Your operating system-specific Oracle documentation for the default value of this parameter
"USER_DUMP_DEST" for information on setting a destination for server process trace files
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch114.htm#REFRN10008
USER_DUMP_DEST
Parameter type
String
Syntax
USER_DUMP_DEST = {pathname | directory}
Default value
Operating system-dependent
Parameter class
Dynamic: ALTER SYSTEM
Range of values
Any valid local path, directory, or disk
USER_DUMP_DEST specifies the pathname for a directory where the server will write debugging trace files on behalf of a user process.
For example, this directory might be set as follows:
On MS-DOS: C:\ORACLE\UTRC
On UNIX: /oracle/utrc
On VMS: DISK$UR3:[ORACLE.UTRC]
See Also:
Oracle9i Database Performance Tuning Guide and Reference for more information about the use of trace files
Your operating system-specific Oracle documentation for the range of values
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96536/ch1220.htm#REFRN10229
If you get connection as sys or system in SQL*PLus you can find the values of those init parameters.
SQL> show parameters user_dump_dest
NAME TYPE VALUE
user_dump_dest string /opt/ora9/admin/LQACNS1/udump
SQL>
SQL> show parameters background_dump_dest
NAME TYPE VALUE
background_dump_dest string /opt/ora9/admin/LQACNS1/bdump
SQL>
SQL>
Joel Pérez