Checked for relevance on 12-May-2008. Clarification/Explanation ========================== The query optimizer can sometimes produce inaccurate estimates about an attribute of a statement due to lack of information,leading to poor execution plans. Traditionally, users have corrected this problem by manually adding hints to the application code to guide the optimizer into making correct decisions. For packaged applications,…
Temporary Tablespace (1) The DEFAULT TEMPORARY TABLESPACE must be of TEMPORARY type. (2) The DEFAULT TEMPORARY TABLESPACE cannot be converted to PERMANENT once it has been defined as the DEFAULT TEMPORARY TABLESPACE. (3) Before dropping the DEFAULT TEMPORARY TABLESPACE, create another one. (4) The DEFAULT TEMPORARY TABLESPACE cannot be taken OFFLINE: (5) The temporary tablespace…
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Step-1 Run @temp_use.sql as following. Following is the code for temp_use.sql SELECT b.TABLESPACE, b.segfile#, b.segblk#, b.blocks, a.SID, a.serial#, a.username, a.osuser, a.status, c.sql_text FROM v$session a, v$sort_usage b, v$sqlarea c WHERE a.saddr = b.session_addr AND a.SQL_HASH_VALUE = c.HASH_VALUE and a.sid not in (select distinct sid from v$mystat) ORDER BY b.TABLESPACE, b.segfile#, b.segblk#, b.blocks / set pagesize…
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Find long running transaction that are running for more than 5 minutes with transaction id. col machine format a30 col sid format 99999 col Transaction_id format a20 col username format a10 col days format 99.99 col minutes format 999999 set lines 120 pages 200 select a.sid, a.username, a.machine, round((sysdate – to_date(b.start_time, ‘MM/DD/YY HH24:MI:SS’)) * 1440)…
Notes on v$transaction The information here contains the view description from the Oracle9i documentation Earlier versions of Oracle may not include all columns. The v$transaction view lists the active transactions in the system. Column Datatype Description ————- ————– ————————————– ADDR RAW(4) Address of transaction state object XIDUSN NUMBER Undo segment number XIDSLOT NUMBER Slot number…
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Declare v_filehandle UTL_FILE.FILE_TYPE; file_dir VARCHAR2(50) :=’/db3/oracle/utlfiles’; begin t_file_name :=’Vatti_test.dat’; v_filehandle := UTL_FILE.FOPEN(file_dir, t_file_name, ‘w’); UTL_FILE.PUT_LINE(v_filehandle, ‘Hello TEST’); UTL_FILE.FCLOSE(v_filehandle); exception when others then dbms_output.put_line(sqlcode || ‘ ‘ || sqlerrm); end; /
TYPE VARCHAR2(17) Identifies the type of record section: DATABASE, CKPT PROGRESS, REDO THREAD, REDO LOG, DATAFILE, FILENAME, TABLESPACE, LOG HISTORY, OFFLINE RANGE, ARCHIVED LOG, BACKUP SET, BACKUP PIECE, BACKUP DATAFILE, BACKUP REDOLOG, DATAFILE COPY, BACKUP CORRUPTION, COPY CORRUPTION, DELETED OBJECT, or PROXY COPY RECORD_SIZE NUMBER Record size in bytes RECORDS_TOTAL NUMBER Number of records allocated…
V$ View Definitions Library Doc ID: Note:220021.1
(1) When you attempt to set the ‘Processes’ parameter to high value (for example> 14000), the instance startup fails with ORA-00064: object is too large to allocate on this O/S ORA-00064: object is too large to allocate on this O / S. Solution: Change PROCESSES parameter. or The workaround to bypass this limit is to…
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ALL DB = Primary + DR databases. -> Implement checkfile concept so script will not page for planned maitenance. (1) Connect and update all Primary db for hang check. (2) Check for pmon for all db. (3) Check Alert log for ORA error for Primary database. (4) Purge Alert log of Primary and keep backup…
