Oracle DBA Consultant Resume

Title
Oracle DBA Consultant

Primary Skills
Oracle 9i/10g specialist, RMAN, RAC, Dataguard & Performance Tuning

Location
United Kingdom-London (will consider relocating)

Posted
Jan-21-08


PROFILE

Skilled Oracle DBA certified Professional with extensive experience in Database Administration, Unix Administration, good project management, organization with excellent communication skills. I have over 4 years of active experience. I have extensive experience in database design, installation and configuration, system implementation and problem trouble shooting. My experience cut across different organizations, which includes financial, government, healthcare and business systems. I am a detail-oriented professional with extensive customer service experience. I am able to grasp and assimilate new technologies very quickly with virtually little or no external training or support

CERTIFICATIONS

Oracle Certified Associate (OCA) in 9i Database Administration
Oracle Certified Professional (OCP) in 9i Database Administration
Oracle Certified Professional (OCP) in 10g Database Administration

SUMMARY

All of my experience & knowledge has been gained across the major Oracle database versions (8i, 9i & 10g) including applications (11i) and a wide range of operating systems (MS-Windows 2000, 2003, NT Server, UNIX/Linux, Sun Solaris, HP-UX & AIX). I have been exposed to a wide range of technologies and developed a broad set of technical skills and a very strong background in Oracle Database & flavours of UNIX operating system

Extensive experience with Oracle RDBMS Administration
Extensive knowledge on database administration for Oracle8i, Oracle9i and Oracle 10g, with experience within very large scale database environment and mission critical large OLTP systems
Extensive knowledge on database upgrade from Oracle 8.x to Oracle 8.i and from Oracle 8i to Oracle 9i and eventually to 10g
Excellent knowledge of SQL*Plus, SQL*Net, SQL*Loader, PL/SQL, Enterprise Manager & Performance Tuning Pack
Extensive knowledge on database backup/recovery strategy (RMAN, Export/Import & Datapump), Performance Tuning, Capacity Planning, hot standby databases, Oracle configuration management, database cloning, refresh, and patch management
Experience in writing Shell scripts to backup, restore database and automate daily activities
Database upgrade/migration from 9i to 10g
Setup oracle Enterprise Manager (OEM) 9i/(Grid Control) 10g for database monitoring/performance/diagnostics
Extensive experience with users and space management
Solid production and development skills, knowledge on data modelling, ability to understand complex data relationships and data base design
Working knowledge of replication, migration and system integration
Good knowledge in Real Application Cluster (RAC) Setup & Administration
Experience in implementation of enterprise databases on enterprise Storage Solutions using Storage area Networks (SAN) /Network Attached Storage (NAS)
Database System Architecture, Data Modelling, Logical/Physical database design (Dataguard implementation for Disaster Recovery), creation, maintain, and documentation
Expertise in capacity planning (planning growth & changes on databases)
Good understanding of the Architecture, Features and Facilities offered by 10gAS to 9iAS to Developing, Deploying and Operating Internet Applications of Saving Costs and Time
Vast experience in Performance Tuning (I/O, Memory & SQL Tuning etc) by working in development area in using ESTAT/BSTAT and more with STATSPACK as the main tool to tune SQL queries
Proficiency in Installing, Upgrading, Patching and implementation of Oracle Applications 11i and Proficiency with several AD admin tools like Rapid clone, ADpatch, Auto upgrade, ADadmin, ADcontroller, Adsplicer Etc
Experience in maintaining all financial, manufacturing and few HR modules such as GL, AR, AP, BEN, PAY, PER etc, Powered on RHEL AS 3,4 & Oracle 9.2.0.5

EDUCATION HISTORY
.
B.Tech (Hons), Bachelor of Technology, India (1997-2001)
Advanced Diploma in Computer Applications, India (2001-2002)



CAREER

Oct 2007 to Present, Oracle DBA Consultant with Credit-Suisse, London, UK.

AS a leading Investment bank, At Credit-Suisse financial evaluation office Enterprise databases are grouped based on the applications they support. DBAs are assigned to support specific group of databases, but must support all databases during On-Call, Recovery and other special occasions. DBAs are responsible for supporting the production and development environments, maintained on RHEL 3 & 4.0 Cluster Environment.

Environment: Oracle Server 10G/9i, OEM (Oracle Enterprise Manager), SQL*Plus, PL/SQL, Sun Solaris5.9, Linux Red Hat 3 & 4.0, AIX, Database Size: 20GB to 200GB

Responsibilities:

Real Application Clusters monitoring, tuning, load balanced using OEM (Oracle Enterprise Manager), Statspack, and V$ dynamic views
Configured Oracle Management Sever (OMS) for enterprise-wide database event monitoring, change management and performance tuning and to meet the SLA on each database by maintaining high availability / uptime
Designed and developed scripts to monitor instances locks, long running queries, listener, free space, extents growth, etc
Design and implement of database backup strategy and performed full, incremental and Cumulative backups using RMAN. Troubleshooting with RMAN backup problem.
Written PERL, Shell scripts to automate daily processes like archive log, data file, tablespaces, control files backup
Restructured production databases and Improved performance by 35 %, considered the requirements of Business, databases and applications, and resource utilization.
Optimization and fine-tuning the database by planning storage requirements, building indexes and altering storage clauses for tables and indexes. Monitor and Tuning of Database Performance by using various optimization techniques
Provide 24/7 monitoring of network and database operations to ensure top operating efficiency. Interacted with Oracle Support for resolving various critical database issues
Involve in the Capacity Planning for databases based the future business growth requirements
Provide database administration on production, testing and development database servers. Creation of database objects like tables, indexes, stored procedures, snapshots and views etc. Creation of users and roles and maintaining system security
Coordinating with Developers and users connecting to different databases, setting policy and procedures as they relate to database maintenance, Security, backup & Recovery, SQLs coding guide lines etc
Estimate Storage requirement, Creation of Tablespaces and other Database Primary Objects.
Clone/Refresh of Production databases to Testing and training environments
Created a self-tuning procedure for adjusting SGA memory components based on application processing needs
Tuned parameters for a large monthly SQL* Loader job resulting in 90% reduction of operation time
Worked closely with application team members to perform SQL Tuning using Explain Plan, SQL Trace, Optimizer Hints, Statspack and TKPROF utility. Participate in testing and the development of performance standards
Administer an Oracle database and its users using Oracle Enterprise Manager
Responsible for 24x7 on-call support and morning DBA

May 2006 to June 2007, Oracle DBA with Credit-Suisse, London, UK.

Credit-Suisse is a world-leading financial services company headquartered in Zurich, advising clients in all aspects of finance around the world
Environment: Oracle Server 10G/9i, OEM (Oracle Enterprise Manager), SQL*Plus, PL/SQL, Sun Solaris5.9, Linux Red Hat 3 & 4.0. Database Size: 20GB, 200GB to 1TB

Responsibilities:

Hired to support and assist a team of DBA's in migration of databases from 9i R2 to 10g R2. The role involved in installation, configuration & upgradation of oracle server software on Linux boxes. Modified and finalized the migration guide
Migrate 50 databases in dev, test, and production environments
I have Applied latest releases of the RDBMS patches from Oracle to the Production and test instances to resolve few technical challenges & issues
I also developed User Acceptance Testing plans like upgrade testing, minimal testing, functional testing, integration testing & performance testing on new 10g databases
Setup/configured oracle RMAN for database backup and recovery. Applied different recovery procedures for complete and incomplete recoveries depending on the type of failure by using export/import & o/s scripts like shell & korn scripts
I have used Oracle 10g Enterprise Manager db console tools such as ADDM, AWR for diagnosing & monitoring events, jobs & performance related problems I also used SQL Access & SQL Tuning Advisor for tuning high load SQL statements and workload. Monitored all databases status including CPU, memory, I/O, space Management, block, and dead lock using OEM
Tuned databases for memory tuning by adjusting Buffer cache size, log switches and reducing check pointing, increasing sort area sizes, shared pool area, prioritizing oracle processes and increasing SGA overall
Advised developers confidently using Explain plan, TKprof and identifying the Execution plan in tuning queries, using Indexes, partitioning, hints etc
Involved in tuning Transaction intensive servers under OLTP situations (I/O bottlenecks, SGA, Pinning objects, Sort space, literal sql, Redo logs)
Assisted few developers in writing effective SQL and PL/SQL to create stored procedures, functions, Packages and triggers
Performed daily alert log files, trace files check, and general data consistency & data integrity check. Checked the configuration and performance of the existing databases including data file allocation, index, fragmentation and the impact on system performance. Analyzed potential problems (response delay, locking, server down time, etc) and avoided it
Installed and configured of Oracle 10g/9i RAC (Real Application Clusters) on Redhat Linux. Add new nodes to RAC 10g Cluster to distribute the load
Setup and supported for Oracle 9i/10g HA solutions including RAC, Standby servers, Data Guard
Setup, Configured Oracle Data Guard using physical standby database
Created, maintained, and monitored the Standby Database (contingency site)
I had also Set up Oracle Enterprise Manager (OEM) (Grid Control) 10g for database for diagnosing & monitoring performance related problems and configured with Application servers on test databases
I was Part of the team in implementing oracle financials and Order Management applications (Rel 11) in complex Single & Multi-node Environments. Custom modules were developed to interface to oracle Order Managements product Configuration. Developed strategy and approach for loading data into oracle Applications
Cloned the instances from production to Test, Development instance to test & simulate few technical challenges, coordinate with testing and development teams
Upgraded of Applications from 11.5.9 to 11.5.10 on test servers successfully
I worked closely and established good relationships with developers, SA's for discussing infrastructure support, recommendations and implementation to resolve development & production issues

April 2005 to March 2006, Senior Oracle DBA with Capula, London, UK

Capula supplies patient administration and medical record systems to the UK and foreign markets. As Oracle core DBA, Provided day-to-day clinical data management and analysis support to clinical research user community, response for designing, scheduling, and monitoring backup plan of entire databases of enterprise, and Managed import and export data for Dev and QA team

Environment: HP UX, Linux, Windows XP, Oracle 9i Database Sizes: 50-100GB

Responsibilities:

Transferred the bulk data from text file into Oracle Database using SQL * Loader and export & Import utility for backup purpose and distributing the tables in multiple environment
Advised the developers when performance issues occurred and Used Explain Plan, Auto-Trace and TKProf utility to examine the execution plan for tuning SQL statements. Familiar with the Beginning and Ending Statistics utilities (UTLBSTAT and UTLESTAT)
Few tasks as a part of development DBA, I helped and assisted developers to write efficient SQL & PLSQL code. Heavily utilized the parallel query, parallel DML and partitioning options of oracle 9i for data transfers and object creations. Worked on query optimization, especially for star queries. Tuned large data load
Written a variety of SQL*Loader command files, including ones to import order entry data Transformation and Load (ETL) code using SQL*Loader as well as validation code using PL/SQL for data integrity
Monitored and tuned production environment when volume of data impact performance utilizing OEM SQL Analyze, OEM Performance Manager, STATPACK, SQL Trace, TKPROF, etc
As my experience grew I moved rapidly from development to production DBA, became the principal DBA for the company. My activities changed as the number of databases increased up to 500 users of 50Gb per database. I was no longer responsible for any product development but used my PL/SQL skills to assist in my DBA work.
I became a full production support DBA planned & implemented backup & recovery strategies (Hot backup, Export & RMAN) for the production databases and monitored by using OEM to ensure 24x7 operations by checking the backup logs to ensure backups were taken, monitoring the alert log and general database housekeeping
Performed operations like Creation of Users, Session Management, and Granting Privileges to users from Applications and managing the space, Monitoring the Free Space, Chained Rows & Migrated rows etc.,
Provided & supported Network Configuration to all Client & Server systems
For primary point of contact for Capula customers with database issues, I used to raise SR's with Oracle support, identifying bugs and installing any required patches by negotiating down times with customers with a 24*7 requirements and also made extensive site visits.
Part of the project work was the implementation of Oracle Dataguard for a critical financial database onto new server hardware. As the responsible DBA, I configured, deployed, tested and documented the Dataguard setup and successfully conducted the switchover to the new live system. This work was done to a very tight deadline and schedule, without compromising the other project work
Produce documentation for use in configuration, repair and troubleshooting of managed database systems.
Participate in capacity planning and disaster recovery exercises while producing supporting documentation
Practised Implementation of Oracle Grid Control for future upgradation of databases and Management Packs to provide enhanced database monitoring and management capabilities
.
May 2003 to Feb 2005, Oracle DBA with Giant Store, Ministry of Interior, Saudi Arabia

Giant store is one of the largest commercial markets in Saudi. Another client I worked in Saudi was Ministry of Interior, which is a government sector of Saudi.

Environment: Sun Solaris, HP-UX, Oracle 8i & 9i, SQL Plus

Responsibilities:

Dealt with production databases comprised of two instances: 380 and 200 Gigabytes in size. The total implementation used oracle 9i on an HP 9000 running UNIX and using NetApp storage devices. Where I installed oracle server 8.1.7.1.1 and upgraded to 8.1.7.3.0 and in overtime this became 9.0.1 & 9.2.0 oracle Fail Safe environment
For another client in Saudi I worked as Production DBA for a 2.3 Terabyte oracle8i instance where I assisted primarily in migrating the production database from Sun 6500 to Sun E10000.
I helped the upper-management (Vice President level) in identifying avenues to increase customer satisfaction and also helped the existing DBA's identify areas to streamline change control, database monitoring, and performance tuning. Assisted with cost cutting by adopting a “Database Housekeeping”
Used oracle Enterprise Manager (OEM) for routine monitoring
I also wrote backup scripts (hot, cold and export) for the oracle Fail safe OS environment
I was responsible for checking the backup logs to ensure backups were taken, monitoring the alert log and general database housekeeping
I was also responsible for the maintenance of the data warehouse reporting database deployed at various customer sites, implemented using Oracle Replication (snapshots/materialized views). This included writing adhoc SQL reports for customers, materialized view design and query performance tuning
Provided Oracle version 9.2.0.4 Replication Support for Development of new security software. Analyzed replication environment, provided replication support fixes: Implemented Replication Conflict Resolution; Provided Replication troubleshooting and solutions for various Replication issues; provided Oracle Patch installation. Developed Oracle Replication Troubleshooting Guide
Replication and synchronization data with other branches using Materialized View
Worked closely with UNIX System Administrators to decide on the best memory and File Management architecture (RAID 5, 1+0, 0+1,) for databases created from scratch
With the increase in size and complexity of the product I was heavily involved in performance tuning at both the application and database level and became a technical leader, providing advice on Oracle architecture best practice to the Oracle development teams. I implemented STATSPACK at all customer sites to provide base line activity and identify performance issues and became proficient with wait event analysis (SQL tracing and TKPROF)
Migrated all client sites from versions 8i to 9i Release 2, to support the business requirement of deploying the new web based product front end
Provided first line IT helpdesk support for external customers
Provided first line IT helpdesk support for internal customers
Mostly office based, some call centre work

REFEREES

Available upon request

Certifications
OCA & OCP both in 9i & 10g database administration


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