Abhishek Chatterjee

E-mail: abhishekchatterjeex87@gmail.comContact No.: 4016367909

Seeking a positive challenging environment that encourages learning, creativity, provides exposure to new ideas and simulates personal and professional growth.

More than 6 years of total and relevant experience as Oracle Database Administrator and Performance Tuning

Expert in Oracle Database Administration , Performace Tuning and Database consolidation and migration.

Expert in Oracle database 8i/9i/10g/11g, Real Application cluster (RAC), Oracle Dataguard Expert knowledge in Operating System specially LINUX, Solaris and AIX. Excellent in RMAN Backups , Database Restores and Recovery Expertise in creation of Primary Database Objects like tables , indexes etc. Developing Partitioning

Strategies , Managing Database Security by creating new users , roles and profiles Develop capacity and performance metrics as well as maintain, analyze, and report on a scheduled

periodic basis to management on development progress. Expert in automating task using Shell scripting Expertise in Database Installation , Upgrade and Patching Skilled in editing and scheduling shell and batch scripts to execute full exports for data migration Excellent in the use of Data Pump , Database Cloning and SQL Loader Utilities Excellent communication skills. Ability to think analytically with strong interpersonal, management &

decision making skills.

Bachelor of Technology with specialization in Information Technology

Oracle Database 11g Administrator. Oracle Database SQL Certified Expert.

Oracle:

Performance Tuning: Expert in oracle performance tuning with usage of methods like AWR, ADDM, TKProf , SQL plan management, SQL baselines and SQL profiles.

Tuning SQL using explain plans, Tuning Advisors, SQL profiles, outlines . Suggesting rewrite of query, making index recommendations for better performance.

Upgrade and Consolidation: Database upgrade from 8i,9i,10g to 11g environment with experience in both DBUA and manual method. Server capacity review and consolidation of database instances to save license expenses.

Backup and Recovery: Devising database backup strategy and managing database backups based on RPO and RTO. Expert in using RMAN, Data pump, Snapshot backups for backup and recovery. Expert in use RMAN duplication, oracle Flashback.

Real Application Cluster and High Availability: Install and Manage Oracle Real Application Clusters (RAC), Use of Services and TAF to provide seamless high availability solution .

ACADEMIC CREDENTIALS

CERTIFICATIONS AND TRAININGS

CAREER ABSTRACT

AREAS OF EXPERTISE

Name – Abhishek Chatterjee Contact Details - +1 (401)6367909 – abhishekchatterjeex87@gmail.com

Oracle Data Guard and Golden gate: Setup and manage physical and logical Standby for Disaster recovery. Setup and manage active Data guard, flashback standby etc .Knowledge of Golden gate for replication and minimum downtime database migrations.

#1: Database Administrator with Comcast

Title : Database Administrator Duration : Jul 2015 - Till Date Client : Comcast Company : Tata Consultancy Services Technologies : Oracle 9i, 10g, 11g. Location : Englewood , Colorado USA

Responsibilities and Accomplishments: Developing the Database Standard document for oracle installation, upgrade of database and

database Standard Operating Procedure. Managed multiples projects simultaneously dealing with Application Developers, Unix Admins,

Storage Admins and Project Managers. Integrated Oracle databases with LDAP using Functions and triggers to automate user management

on Production database improving security compliance. Automation of user, role and profile creation/drop process using Shell scripting. Creation of new environments importing data from Production Databases Designing Backup and recovery Strategy for maximum database availability Analyzing tkprof and AWR for performance improvement. Writing shell scripts for day to day maintenance activity. Maintaining user security.Creation of Database Profiles . Installing and setting up RAC Environment similar to Production. ASM Instance creation and Monitoring Created database reorganization procedures, scripted database alerts, and monitored scripts. Performance tuning for PL/SQL batches. Working with Oracle Enterprise Manager for addressing performance issues Working on ADDM,AWR,SQL Tuning Advisors, Segment Advisor, Automatic Undo Management OEM Performance Tuning of sql queries by analyzing explain plans , identifying unused indexes etc. Instance Tuning of RAC Databases

#2: Primary DBA support

Title : Primary DBA support and PLSQL Developer Duration : Apr 2010 to June 2015 Client : CVS Caremark Company : Tata Consultancy Services Technologies : Oracle 9i, 10g, 11g Location : TCS Gurgaon , India and Woonsocket , Rhode Island USA

Roles and Responsibilities:

Resolved Severity 1 issues within SLA of 4 hours and performed detailed Root cause analysis to provide permanent fix.

Expert in areas of Oracle 11g/10g/9i/8i, PL/SQL, SQL, SQL*Plus, SQL*Loader.

Professional Experience

Name – Abhishek Chatterjee Contact Details - +1 (401)6367909 – abhishekchatterjeex87@gmail.com

Managed projects successfully involving new environment builds and upgrades of existing environment.

Working with Application Team in solving the issues with Batch jobs, Long running queries and related tuning

Performed user and security administration activities, such as, user profile creation, enrolling users, granting privileges to users, and maintaining system security, handing user connections

Database maintenance activity-reorg Monitoring PL/SQL Batch performance daily for cycles running in ST and UAT environments Restoring the backups and test the backups (RMAN,COLD and HOT) Taking and monitoring RMAN Backups Deployment of Releases in Non-Prod Environments and Production Environment PT Database Data Masking Automation activities for Index Rebuilding Job ,SMTP job , creating stored procedures etc. Performance Tuning for DML’s and Datafixes to be applied on Production and OLTP Queries Identified and reduced/eliminated non-idle wait events such as scattered file read, sequential file

read wait event, log file completion, in queue, and buffer latch waits Ensuring that storage, archiving, backup and recovery procedures are followed properly Completed Refresh different databases using Oracle Export / Import and Datapump utility Running Tuning advisor and transporting SQL plan baselines from one DB to production Constant Interaction with other support teams – Server, Backup & Storage and Applications team to

ensure effective and efficient project delivery. On-call support on off-business hours. Checking Alert Log errors and to make necessary actions to rectify them. Daily Status meeting with the customer Liaison with Oracle support for resolving complex technical issues Installation of oracle 8i , 9i ,10g and 11g software on Oracle AIX and Windows platforms. Experience in creating and maintaining Real Application Cluster Databases and architecting RAC

environments. Architecting database servers and database environments. Planning the strategy of backup and recovery using user managed, EMC snapshot backups, RMAN ,

datapump etc. Installation of Oracle Single Instance on OFS, Creation of Disk structure on ASM, setting up RAC. Database monitoring which includes basic health checks, growth of objects, and performance of the

database PLSQL coding for application development and Performance Enhancing for the application Refreshing and cloning of databases using RMAN in RAC and non RAC Environments. Handling issues on ASM and RAC environments. Worked with Oracle Corporation and opened SR's to resolve the issues. Worked with oracle support for procuring and managing licenses. Environment upgradation from one Release to another Release in all DEV , ST,UAT and Prod

Environments Oracle Stream creation and monitoring. Compression/Repartitioning Of Large Segments Enforcing data integrity using integrity constraints & database triggers and also generating schema

level trace files using database triggers. Creating wallets for control M setup. Worked with Resource Manager to cancel_sql and limit query runtime , etc .

Name : Abhishek Chatterjee

Personal Details

Name – Abhishek Chatterjee Contact Details - +1 (401)6367909 – abhishekchatterjeex87@gmail.com

Address : 10001 E Dry Creek Road , Apt#6207 Englewood Colorado - 80112Phone : +14016367909Gender : MaleMarital Status : SingleLinguistic Abilities : English , Hindi , Bengali