Oracle Archive log growth too fast processing method

Oracle archive logs are typically generated by DML statements, so increasing too quickly should be DML too frequently

Start by querying the following daily archives:

Select TRUNC (first_time) "Time",
SUM (Block_size * BLOCKS)/1024/1024/1024 "SIZE (GB)"
From V$archived_log
GROUP by TRUNC (First_time);

So you can judge the time period to start filing a comparison exception.

Analyze archived logs in the following two ways

Method One: Use Logminer

1. Create a related package using a script

@ $ORACLE _home/rdbms/admin/dbmslm.sql
@ $ORACLE _home/rdbms/admin/dbmslmd.sql;
The first script is used to create a DBMS_LOGMNR package to parse the log file.
The second script is used to create a dbms_logmnr_d package that is used to create a data dictionary file.

2. Specify the log files to parse
exec sys.dbms_logmnr.add_logfile (logfilename = '/archivelog/node/1_771348_78836667000.arc ', options = Dbms_ Logmnr.new);

3. Analyze archive logs using a local online data dictionary
EXEC sys.dbms_logmnr.start_logmnr (options = Sys.dbms_logmnr.dict_from_online_catalog);

4, query the archived log content of the analysis, for example, the schema of the maximum amount of modification
Select Seg_owner,count (*) from v$logmnr_contents GROUP by Seg_owner;
Select COUNT (1), substr (sql_redo,1,30) from V$logmnr_contents Group by substr (sql_redo,1,30) Order by count (1) desc;

5. Add other log files
EXEC sys.dbms_logmnr.add_logfile (logfilename=> '/archivelog/node/1_773333_78836667000.arc ');
EXEC sys.dbms_logmnr.add_logfile (logfilename=> '/archivelog/node1/1_773334_78836667000.arc ');
6. End the Analysis archive log
exec SYS.DBMS_LOGMNR.END_LOGMNR;

Method Two: Use the Toad tool to view log information

Find Logminer in database and then put the log to be analyzed in, there is a detailed database execution records, very intuitive to see the resulting archive of the statement

After the statement is found, and then to develop a piece of discussion can also reduce the execution frequency of some DML statements

Oracle Archive log growth too fast processing method