Category: Oracle

Transfer SQL Profiles from One database to other database.

05-Sep-2024 Admin No Comments

In this guide, I’ll walk you through moving SQL profiles using a staging table. SQL profiles help databases optimize query execution plans. Step#1 Create the Staging Table First, create a staging table to hold SQL profiles that need to be transferred. SQL> exec DBMS_SQLTUNE.CREATE_STGTAB_SQLPROF(table_name => ‘SQL_STG_TAB’, schema_name => ‘SYS’); This will create a table SQL_STG_TAB…

Oracle, shell, SQL scripts

Load testing on Oracle 19C RAC with HammerDB

18-Jan-202418-Jan-2024 Admin No Comments

When dealing with Oracle 19c Real Application Clusters (RAC), the process of capturing a workload from a source Oracle 19c RAC database and replaying it on a target Oracle 19c RAC database using HammerDB involves some additional considerations. Below are the revised steps: Capture and Replay Workload from Source to Target Oracle 19c RAC Download…

Oracle

Creating never expiring DB user accounts in Oracle

14-Sep-202314-Sep-2023 Admin No Comments

DB Users are required to reset the password periodically for better security. For some service accounts, we need to make sure the password does not expire and does not impact the application. For this purpose, we need to update that user’s Profile. Each Profile has multiple security settings that controls Password_life_time, password_reuse_time, password_reuse_max settings. These…

Oracle, SQL scripts

Convert multiple rows to single column

13-Sep-202313-Sep-2023 Admin No Comments

Converting rows to single column: create table emp ( empno number, empname varchar2(100), deptno number); insert into emp values( 1, ’emp1′, 10); insert into emp values( 2, ’emp2′, 20); insert into emp values( 3, ’emp3′, 30); insert into emp values( 4, ’emp4′, 10); insert into emp values( 5, ‘paresh’, 30); insert into emp values( 6,…

Oracle, SQL scripts

Find all users who have DML privileges

05-Sep-202305-Sep-2023 Admin No Comments

Run following query as sysdba. alter session set nls_date_format=’DD-MON-RRRR:HH24:MI:SS’; alter session set nls_date_format=’DD-MON-RRRR:HH24:MI:SS’; select username, created, account_status /* Users who granted role with DML privs */ from dba_users where oracle_maintained = ‘N’ and username in (select grantee from dba_role_privs where granted_role in (select role from dba_roles where role in (select GRANTEE from dba_tab_privs where privilege…

Oracle, SQL scripts

Oracle GoldenGate lag monitoring shell script

12-Jun-202318-Jun-2023 Admin No Comments

Following script will be useful for tracking Oracle GoldenGate replicat process and related lag. This script will generate output on standard screen. You can redirect it using file redirection to logfile or other locations. while true do <goldengate home directory>/ggsci <<EOF > test.out info all exit EOF lag=`cat test.out | grep TESTREPLICAT | awk ‘{print…

Linux/Unix, Oracle, shell

Find which sessions is accessing object that prevent your session to have exclusive locks in Oracle

11-Jun-202311-Jun-2023 Admin No Comments

If you want exclusive lock on any table, you need to make sure that no other session is accessing it. This happens when you want to run DDL or any ALTER statements, that internally needs exclusive lock. Following script will to find the blocker session and provide killing statement for clearing locks. col owner format…

Oracle, SQL scripts

ENQ: KO – FAST OBJECT CHECKPOINT tips

25-May-202325-May-2023 Admin No Comments

On reporting queries, there are too many “enq: KO – fast object checkpoint” wait event. All reporting queries are doing full table scans concurrently. Oracle uses direct path reads instead of db file scattered reads. And direct path reads require a checkpoint “_serial_direct_read”=NEVER Parameter Session Value Instance Value ————————————————– —————————— —————————— _serial_direct_read auto auto

Oracle

GSQ.sql

19-May-202325-May-2023 Admin No Comments

This SQL will be used to identify SQL details of given Session. You need to pass SID and INSTANCE_ID as INPUT. This query will provide session details, SQL_ID, SQL_EXEC_START time and other transaction level details. set echo off feedback off verify offcol Transaction_id format a20col username format a8col days format 99.99col hours1 format 999999col TX_HRS…

DBA_HIST_SQLSTAT contents

10-May-202310-May-2023 Admin No Comments

Query DBA_HIST_WR_CONTROL to see the interval, retention and the TOPNSQL setting. For TOPNSQL a setting of DEFAULT translates to: 30 where statistics_level is typical 100 where statistics_level is all Simply because this one SQL appears to consume 7% of the load it may not be in the top SQLs in these categories: Elapsed Time CPU…

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Oracle