Oracle Sql Tuning Resume
Pasadena, CA
SUMMARY:
- About 9 years of experience as Oracle DBA/Exadata having hands on 12c, 11g, 10g on AIX, Linux, and Windows servers experience with RMAN, and standard backup and recovery procedures; practicality of Data Guard, upgrades and patches.
- Worked as a Core DBA/Exadata DBA as migration specialist on Oracle 11gR2, Exadata X4 & X7, OEM 13c, RAC, Data Guard, Linux.
- Excellent experience in production support, installation, configuration, upgrades.
- Expertise in development, testing and implementation of Backup and Recovery Strategy Using RMAN, Data pump and Export/Import utilities.
- Strong experience in Backup and Recovery strategies using RMAN, Export/Import, Data pump, Hot and Cold backups.
- Provide network troubleshooting and administrative support for the development staff.
- Implemented Data guard (Physical Standby) for RAC databases.
- Proficiency in standby database (Data guard) installation, configuration, maintenance, and administration for disaster recovery.
- Proficient in scheduling jobs, patches, alerting for databases and also database administration through OEM12c and 13c cloud control.
- Oracle Exadata (X4 & X7) administration supporting multiple database RAC environments.
- Configured and administered many installations of Data Guard and Active Data Guard.
- Documented database structure, changes, problems, issues for future reference.
- Identify and make recommendations per database performance issues.
- Installed Oracle Clusterware to provide infrastructure for RAC and configured 2 node Oracle 11g RAC.
- Extensive knowledge on database administration of Oracle 10g, 11g, 12c with experience on very large - scale database environment and mission critical large OLTP and OLAP systems.
- Extensive knowledge of Oracle OEM 12c Architecture, Framework, and Infrastructure.
- Perform root cause analysis on failures. Resolve performance tuning related issues and queries.
- Experienced in troubleshooting traditional export/import and data pump export/import.
- Performed DB patching, Cloning, DB Installation, troubleshoot issues/errors/incidents, Collaborate with Oracle support for bugs & issues resolutions and personal research.
- Integration of Exadata monitoring and escalation into existing IT monitoring and actionable events solutions.
- Created Unix Shell scripts to automate database operation.
- Troubleshooting of Performance and Tuning problems in Oracle database using tools like AWR, ASH, ADDM, STATSPACK, OEM Grid Control and manual scripts.
TECHNICAL SKILLS:
Database: 12c,11g,10g & 9i Backup & Recovery (RMAN)
Database Troubleshooting: Database Upgrade Database Migration
Performance Optimization: Managing High Availability
Data Guard, ASM & RAC: Exadata
SQL: Training and Mentoring
Documentation: 13c Cloud Control
PROFESSIONAL EXPERIENCE:
Confidential, Pasadena, CA
Oracle SQL Tuning
- Involved in Teradata to Exadata migration project (TD2EX) by performing SQL Query Tuning.
- Extensive use of OEM tools in analyzing slow SQL.
- Used Oracle Exadata Feature (Offloading, Smart Scan) to improve query performance.
- Involved in analysis and tuning of SQL queries by using SQL Monitor report and Explain Plan for faster and better performance of the SQL queries.
- In order to overcome performance bottlenecks, implemented alternate approaches like
Global Temporary Tables, Common Table Expression (CTE) and Early row reduction etc.
- Experience in optimization of code and tuning SQL queries for optimal performance.
- Used Explain Plan, Oracle hints and Expression stats to improve the performance of SQL statements.
- Co-ordinated with Real World Performance Team (RWPT) to resolve complex SQL performance problem.
- Perform root cause analysis on failures. Resolve performance tuning related issues and queries.
- Performed application Query tuning using utilities ADDM, AWR.
- Generate and interpret ASH, explain Plan.
- Experience in SQL tuning using Explain Plans and Hints, Performance Tuning for better performance.
Environment: Oracle Database 12c, SQL*Plus, OEL6, UNIX, SQL Developer, OEM, Putty.
Confidential
Computer System Analyst
Responsibilities:
- Worked as a Core DBA/Exadata DBA as migration specialist on Oracle 11gR2, Exadata X4 & X7, OEM 13c, RAC, Data Guard, Linux.
- Support multiple mission critical RAC databases running on Exadata machine.
- Maintained database backup and recovery procedures that support business continuity.
- Checking Databases Backup and Restore validity periodically, and Data refreshes from Production to Non-Production environment, Creation Duplicate Databases using RMAN Backups.
- Performed Database Refresh using RMAN duplicate and Schema level refresh from Production to UAT and DEV Environments for testing Purposes.
- Performed 60 TB Database Migration from X4-2 to X7-2 Exadata machine.
- Performed monthly partition maintenance like truncating partitions and adding new partitions.
- Perform data validation post database migration using row count and object count.
- Applied quarterly patches and one-off patches on regular basis.
- SQL Tuning, End-user tuning and troubleshooting using various tools like EXPLAIN PLAN, AUTOTRACE, SQL TRACE, TKPROF, AWR, ADDM, ASH, v$ performance views.
- Respond to database alerts and perform Root Cause Analysis (RCA).
- Added, deleted database instance/services for RAC configuration.
- Work on different versions of Databases with OEM Grid control to maintain the database effectively.
- DBA activities such as configuring Grid events, Regular Backup's, Replication, Tuning, and troubleshooting performance issues.
- Cleaning the ORACLE HOME file system by cleaning the log files, alert log file and listener.log files.
- Documented database structure, changes, problems, issues for future reference.
Environment: Oracle Database 11gR2, OEL6, Exadata, RMAN, SQL*Plus, PL/SQL, Shell scripting, RHEL6.1/7.1, SQL*LOADER, Oracle OEM, Putty, Data guard, Toad.
Confidential
Database Administrator
Responsibilities:
- Responsible for Oracle Database Administrator, providing 24x7 support for production and development 11g/10g databases on different platforms like Linux/Unix and windows.
- Planning, installation, configuration, management and troubleshooting of Oracle 10g, 11g and 12c databases on Linux,Unix(i.e AIX) and Windows OS.
- Responsible for Installation of RAC and Managing RAC Environment efficiently.
- Performs daily database backup of development and test environments, use production data to refresh development and test schemas for testing
- Extensively using DATAPUMP and Export /Import utilities for logical backups.
- Analyzing the Tables and Indexes on performance base regularly.
- Documented database structure, changes, problems, issues for future reference.
- Provide network troubleshooting and administrative support for the development staff.
- Troubleshoot and resolve various Oracle connectivity problems.
- Expertise in the creation of databases, table spaces, tables, indexes and other database objects.
- Implemented and maintained Oracle 10g/11g Data Guard/standby databases for fail-over purposes.
- Cleaning the ORACLE HOME file system by cleaning the log files, alert log file and listener.log files.
- Knowledge of writing Automated Scripts in the CRON for backups and restoration.
- Used EXPORT/IMPORT to do table level and full database defragmentation.
- Managed RAC Linux servers, running Oracle in cluster environments.
- Work with the production support team and maintain operational consistency and efficiency.
- On quarterly basis perform DR-Drill activity to test application functionality.
Environment: Oracle Database(10g,11g and 12c), IBM-AIX, RMAN, SQL*Plus, PL/SQL, Shell scripting, RHEL6.1/7.1, UNIX, SQL*LOADER, Oracle OEM, Putty, Data guard.
Confidential
Technical Associate
Responsibilities:
- Managing users, roles & privileges, backup & recovery procedures using daily hot backups and weekly cold backup.
- Performs general DBA duties (install software, create databases, table spaces, add redo log files, managing storage & work closely with Sr. DBA on capacity planning and performance tuning)
- Used various data movement utilities like export, import and Load, Planning.
- Identify and make recommendations per database performance issues.
- Planning and implementing Backup strategy for the databases using RMAN, Scripting backups, once in weeks on the application database.
- Oracle Database and SQL tuning using EXPLAIN PLAN, TKPROF, AWR and ADDM reports.
- Loading the data using SQL Loader.
- Carrying out DR-DRILL activity (Snapshot standby, Switchover-Failover) .
- Sound knowledge in oracle tools like Toad, PL/SQL Developer and SQL* plus.
- Troubleshooting and Recovery of Database from Data file losses. Backup and Recovery involving archiving, redo logs, data files using RMAN.
- Performs DB patching, DB Cloning, Install DB, troubleshoot issues/errors, DB/Application Maintenance using manual approach, Collaborate with Oracle support for bugs & issues resolutions and personal research.
- Developed strategies for data extraction from various source systems, transformation and loading into data warehouse target systems.
Environment: Oracle Database (10g,11g), Shell Script, PL/SQL, TOAD, SQL Developer, SQL loader, TKPROF, Windows 2003.