TABLESPACE MANAGEMENT WHAT IS TABLESPACE ? IT’S A LOGICAL LINK BETWEEN USER AND DATAFILES.IT IS LOGICAL STORAGE OF DATA DICTIONARY: EXTENTS INFORMATION WILL GET FROM BASE TABLES LOCAL: EXTENTS INFORMATION WILL GET FROM DATAFILE HEADERS TABLESPACE MANAGEMENT HOW TO CREATE THE TABLESPACE SYS>>… Read More
set linesize 1000 pagesize 0 feedback off trimspool onwithhwm as ( — get highest block id from each datafiles ( from x$ktfbue as we don’t need all joins from dba_extents ) select /*+ materialize */ ktfbuesegtsn ts#,ktfbuefno relative_fno,max(ktfbuebno+ktfbueblks-1) hwm_blocks from sys.x$ktfbue group by ktfbuefno,ktfbuesegtsn),hwmts as… Read More
Rebalance status : column “Diskgroup” format A30 column “Imbalance” format 99.9 Heading “Percent|Imbalance” column “Variance” format 99.9 Heading “Percent|Disk Size|Variance” column “MinFree” format 999.99 heading “Minimum|Percent|Free” column “DiskCnt” format 9999 Heading “Disk|Count” column “Type” format A10 Heading “Diskgroup|Redundancy” SELECT g.name “Diskgroup”, 100*(max((d.total_mb-d.free_mb)/d.total_mb)-min((d.total_mb-d.free_mb)/d.total_mb))/max((d.total_mb-d.free_mb)/d.total_mb) “Imbalance”,100*(max(d.total_mb)-min(d.total_mb))/max(d.total_mb) “Variance”, 100*(min(d.free_mb/d.total_mb))… Read More
Fragmented_Tables_List in HTML FORMAT : col spoolname new_value spoolname select ‘Fragmented_tables’||to_char(sysdate, ‘YYYYMONDD’)||’.html’ spoolname from dual; spool ‘&spoolname’ set pagesize 200 set markup html on WITH STAT_SPACE AS( SELECT OWNER, TABLE_NAME, NUM_ROWS, AVG_ROW_LEN, NUM_ROWS*AVG_ROW_LEN/1024/1024/1024 tbl_STAT_SPACE FROM DBA_TABLES WHERE OWNER=’SCOTT’), SEG_SPACE AS ( SELECT OWNER, SEGMENT_NAME, SEGMENT_TYPE,… Read More
Below are different kind of problems where you have recovery issues in standby. Before you take any decision check with your colleagues. 1) Check on source : SQL> select dest_id,error from v$archive_dest_status; 2) To know the redo apply rate : set linesize 500col item format… Read More
set linesize 140 pagesize 100select resource_name,current_utilization,limit_value from gv$resource_limit order by 1; Sample Output:
Check existing retention and current snapshot interval. set linesize 300 select extract( day from snap_interval) *24*60+extract( hour from snap_interval) *60+extract( minute from snap_interval ) snapshot_interval, extract( day from retention) *24*60+extract( hour from retention) *60+extract( minute from retention ) retention_interval, topnsql from dba_hist_wr_control; Below query is… Read More
DECLAREcount1 NUMBER := 0;total NUMBER := 0;CURSOR del_record_cur ISSELECT rowid FROM scott.emp WHERE empno<=20000;BEGINFOR rec IN del_record_cur LOOPDELETE FROM scott.emp WHERE rowid = rec.rowid;total := total + 1;count1 := count1 + 1;IF (count1 >= 1000) THEN COMMIT;count1 := 0;END IF;END LOOP;COMMIT;DBMS_OUTPUT.PUT_LINE(‘Deleted ‘ || total ||… Read More
Check Stats of Table : –example : ‘DEPT’,’EMP’,’SALGRADE’ set linesize 300 set pagesize 100 col owner for a15 col LAST_ANALYZED for a30 col table_name for a40 select OWNER,TABLE_NAME , NUM_ROWS , BLOCKS , EMPTY_BLOCKS , CHAIN_CNT, AVG_ROW_LEN CACHE, to_char(LAST_ANALYZED,’DD-MON-YYYY HH24:MI:SS’) LAST_ANALYZED from dba_tables where table_name… Read More
SET TERMOUT OFF; COLUMN current_instance NEW_VALUE current_instance NOPRINT; SELECT rpad(sys_context(‘USERENV’, ‘INSTANCE_NAME’), 17) current_instance FROM dual; SET TERMOUT ON; SET ECHO OFF SET FEEDBACK 6 SET HEADING ON SET LINESIZE 256 SET PAGESIZE 50000 SET TERMOUT ON SET TIMING OFF SET TRIMOUT ON SET TRIMSPOOL ON… Read More
