Purge AUD$ Table
The AUD$ table growth will impact the performance of database so we want to purge it regularly by using the DBMS_AUDIT_MGMT package Check AUD$ table is not in SYSTEM table tablespace.…
Read MoreMoving AUD$ table to another tablespace using DBMS_AUDIT_MGMT
Steps to move the Audit table from SYSTEM tablespace to newly created tablespace. • Audit trail tables called SYS.aud$ and SYS.fga_log$ keeps all Audit records in the Oracle database and…
Read MoreCREATING AN EXTERNAL USER
EXTERNAL USER CREATION External users and their authentication are managed by external services such as operating system or a network service. If our OS environment is secured, we can enable…
Read MoreORA-01000 maximum open cursors exceeded
CURSORS A cursor is a temporary work area created in the system memory when a SQL statement is executed. It can hold more than one row but can process only…
Read MoreCONNECT TO USER WITHOUT KNOWING PASSWORD
We can connect to another user without knowing the password, with grant connect through privilege In this case a user TEST1 wants to connect to TEST2 user and create a…
Read MoreCREATE PASSWORD FILE IN ASM DISK GROUP
CREATE PASSWORD FILE IN ASM DISK GROUP FOR ORACLE 12C ONLY ASMCMD> pwcreate –dbuniquename {db_unique_name} {file_path} {sys_password} ASMCMD> pwcreate –dbuniquename PRDPRE +DATA/PWDFILE/pwdPRDPREoracle FOR ALL VERSION orapwd file=’+DATA/orapwPRODPRE’ ENTRIES=10 DBUNIQUENAME=’PRODPRE’
Read MoreModify ASM user password
LIST ASM USERS ASMCMD> lspwusr Username sysdba sysoper sysasm SYS TRUE TRUE TRUE CRSUSER__ASM_001 TRUE FALSE TRUE ASMSNMP TRUE FALSE FALSE MODIFY USER PASSWORD ASMCMD> orapwusr –modify asmsnmp Enter password:…
Read MoreCopy ASM file to remote ASM instance
ASM file can be copied to remote asm instance(diskgroup) using asmcmd command. SYNTAX asmcmd> cp – -port asm_port file_name remote_asm_user/remote_asm_pwd@remote_host:Instancce_name:TARGET ASM_PATH ASMCMD> cp –port 1521 s_srv_new21.dbf sys/oracle@172.20.17.69.+ASM1:+ARCL/s_srv_new21.dbf
Read MoreSQL’s doing full table scan
select sql_id,object_owner,object_name from V$SQL_PLAN where operation=’TABLE ACCESS’ and options=’FULL’ and object_owner not in (‘SYS’,’SYSTEM’,’DBSNMP’);
Read MoreEstimate space required for index creation
SET SERVEROUTPUT ON DECLARE v_used_bytes NUMBER(10); v_Allocated_Bytes NUMBER(10); BEGIN DBMS_SPACE.CREATE_INDEX_COST ( ‘ create index PROD.INDEX1 on PROD.EMP(EMPNO)’, v_used_Bytes, v_Allocated_Bytes ); DBMS_OUTPUT.PUT_LINE(‘Used Bytes MB: ‘ || round(v_used_Bytes/1024/1024)); DBMS_OUTPUT.PUT_LINE(‘Allocated Bytes MB: ‘…
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