Yongye Serkfem
ORACLE / POSTGRESQL DATABASE ADMINISTRATOR
Profile
Experienced and Resourceful Oracle Database Administrator with years of experience identifying efficiencies and problem areas within data streams, while communicating needs for project support including installation, configuration, Dataguard, GoldenGate, RAC, upgrades, patches, migration, replication, backup and recovery, performance tuning, cloning, space management, and security management,
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Employment History
Oracle Database Administrator at Dell Corporation, Atlanta, GA
February 2018 — Present
Involvement
● Installed and configured PostgreSQL versions like (9.5, 9.6 and version 10) on Linux OS.
● Configured, managed, and monitored replication between master and slave databases.
● Used Pg_Bouncer for connection pooling, PgBadger for generating statistic reports.
● Create roles/tables and grant privileges to users.
● Implemented database security using Pg_crypto.
● Upgraded database versions using pg_dump/pg_restore and pg_upgrade tools and I make sure the latest security patches are updated, provided by PostgreSQL open-source community.
● Exposure to mongo DB environment
● Performed Backups (Pg_basebackup, Backrest, pg_dump) and restore operations, compressed backup and database/schema refreshes.
● I created an RDS Postgres instance and connect with PgAdmin for easy access.
● Experience on restore operations (pg_restore) and Point in Time Recovery.
● Experience in using pg_hero for performance tuning and analysis, SQL Tuning using pg_stat_activity and EXPLAIN ANALYZE.
● Tuned Auto vacuum parameters to reclaim space consumed by dead tuples and ensure the up-to-date statistics of tables.
● Implemented Data Guard with high availability and performance configurations and participated in Data Guard Fail over tests.
● Responsible for the smooth functioning of all ecommerce activities of the organization.
● Renaming and resizing the databases and configured and implemented Oracle Streams (Advanced Replication) for
high availability.
● Performed Schema as well as Table level Replication using Oracle Streams.
● Implemented downstream capture at the destination database using Oracle Streams.
Details
United States, 240-***-****
adm1nf@r.postjobfree.com
Skills
Configure PostgreSQL Streaming
Replication and Pgpool for load
balancing.
Experience in upgrading and
migrating various versions of
PostgreSQL database on different
platforms.
Responsible for all backup, recovery,
and upgrading of all the PostgreSQL
databases
Experience in Data Replication using
Snapshot, Materialized views,
import/export, and Oracle
Goldengate Responsible for
configuring, integrating, and
maintaining all Development, QA,
Staging and Production PostgreSQL
databases within the organization
Implement, configure, and
troubleshoot database instances,
replication, backup, partitions,
storage, and access. Set user
privileges within and outside the
database environment.
Worked with monitoring tools for
better performance like PgBadger,
Kibana, Graphana, and Nagios.
Performed daily administrative tasks
like analyzing databases and
checking for failed processes and
validating disk space.
Full responsibility and expertise in
database administration (DBA),
performance tuning, database
backup, database recovery, database
security, database optimization, data
migration of Oracle instances.
Migration of large number of
databases from 10g to 11g and
implemented ASM on RAC and
stand-alone databases and Applying
PSU Patch and Migration of non ASM
database to ASM database
● Responsible in configuring and backing up database using RMAN, Hot backups, Cold backups, and Logical backups.
● Worked on Multitenant databases.
● Performed Database Refresh from Production to QA, UATs and Development databases.
● Implemented and managed optimum physical database design
(tablespaces, datafiles, extents, redo logs, archive logs) and assessed database capacity by monitoring online storage, growth, and file system space.
● Provided instance level performance monitoring and tuning for Event Waits, Sessions, Physical and Logical IO and Memory Usage.
● Extensive experience in RMAN recovery testing, RAC and standalone database.
● Recovered huge Database (1 Terabyte) when UNDO table space got corrupted in Real Application Cluster (RAC)
● Created a Clone Database using RMAN on remote Server and used SRVCTL commands for Real Application Cluster (RAC) Databases
● Upgraded the databases to version 12c from 11g and 10g
● Installed, Setup, Configured Oracle version 12c Release2 64 Bit on Solaris 10 and RHEL 6
● Up-gradation and Migration of Database from 10g to 11gand then to 12c and applying patches whenever required.
● Applying upgrade patches, maintenance, and interim patches on all the databases.
● Worked on Automatic storage management (ASM) with EMC storage for managing data in SAN.
● Successfully implemented 10g RAC on nodes for high availability.
● Monitored different databases and application servers using Oracle Enterprise Manager (OEM) 10gGrid Control.
● Loading data from flat files to database using SQL*Loader, External Tables.
● Extensively used AWR, ADDM and explain plan for periodic performance tuning.
● Implementing Datapump, conventional export/import utility of Oracle 12c, and 11g in moving tables, schemas, and databases.
● Involved in construction of DR sites for all the Production environments.
● Installed 12c Database.
● Successfully implemented Backup & Recovery using RMAN which includes hot backups and Cold backups.
● Worked extensively on Performance tuning of Queries by maintaining Aggregates, Compression, partition, indexing and use of Hints, Stored outlines, Statistics.
● Installed and configured Oracle 12c database and cloud control 12c to monitor all databases.
● Worked with T-SQL statements like DELETE and UPDATE statements also, BULK insert of data into the table.
● Performing monthly and annual performance reports for trend analysis and capacity planning.
● Assist in SQL tuning and providing consultation such as creating Materialized views, adding indices, dropping unnecessary indices, using hints wherever possible, amongst others.
Configured Oracle Data guard for
Oracle Disaster Recovery and
Performed switchover/switchback
from primary database to standby
database for testing purpose for the
application teams when required.
Good communication and
cooperation skills with an aptitude
to learn quickly, take responsibility,
work under pressure.
Using list partitions for large tables
and bitmap indexes for the OLAP
databases
Installation and configuration of
GoldenGate and Replication of data
using Oracle Golden Gate.
Resolved RAC issues, OCR related
issues, rebooting of faulty nodes,
relocating the switched over services
Remote administration and support
of Oracle production and
development of Databases on major
Operating Systems with sizes up to
11 TB.
Worked actively in configuring and
maintaining Oracle Physical
Standby/Active Data Guard Database
oracle 11g.
Scheduled Cumulative Incremental
backups using RMAN Cloned
databases using RMAN Utility
Extensive experience in installation
and implementing OEM and TOAD
and setup of Oracle Grid Control
Proactively monitoring the
database's health and taking
preventive or corrective actions
Involved in each phase of the life
cycle (SDLC) including requirement
gathering, technical design,
development, system integration
phase, quality assurance phase,
development, and production
support activities
Remote administration and support
of Oracle production and
development Databases on major
Operating Systems with sizes up to
11 TB.
● Worked on both VMS and UNIX environments.
● Troubleshooting of various database performances by proper diagnosis at all levels like SQL, PL/SQL, database design, database tables, indexes, Instance, memory, operating system, and java calls.
● Knowledge in Oracle Data warehouse DBA skills relating to administration and management of VLDB environments, Oracle OLTP.
● Experience in writing UNIX/SHELL scripts for providing the reports.
● Installed and configured Oracle 11g database on a test server using Oracle standard procedures and OFA, for performance testing and future 10g production implementation.
Oracle Database Administrator at Duke Energy,
Charlotte North Carolina
June 2015 — January 2018
Involvement
● Tuned performance of RAC and non RAC databases. Found bottlenecking queries that impede application performance and fine-tuned them.
● Performed Zero-Down Time migration from Hp-Unix to Oracle Enterprise Linux using Expdp and Golden Gate and Ongoing proactive database-level performance tuning, with a good working knowledge of Oracle internals.
● Used OEM 11g/12c and Administering Oracle Database 10g, 11g and 12c databases and masking sensitive data in production databases.
● Patching & upgrades on Oracle 12c database (whilst minimizing or eliminating the impact to live services, i.e., using rolling node patching).
● Upgraded databases from 11.2.0.4 to 12c in QA and Prod environments.
● Worked on Oracle Enterprise Manager Express for Oracle 12c RAC standard.
● Working with logical backup using Data pump and Exports/Imports Utility.
● Database Load and Transformation Techniques (SQL Loader, External Tables).
● Created scripts and scheduled backups in Autosys for RMAN database backups and recoveries and Cloned databases using RMAN Utility.
● Coordinate and suggest PM, SA, and LOB DBA to allocate and setup disks for data files, backups and achieve log sizes for ASM through SAN storage, SAN storage to setup VOTING and OCR ASM LUNS per cluster, swap storage and shared memory needed per each node.
● Tuned ETL process of data warehouse databases to reduce load time. Worked with application developers on SQL tuning.
● Provide technical assistance and guidance to the team in implementing High Availability solutions for the group using features like Real Application Clusters, Flashback, Oracle Streams and 10g Data Guard with Automatic Failover.
● Installed Oracle Database 11gR2 with Real Application Cluster (RAC) with CRS and ASM in SOLARIS environment.
● Worked on creation and deletion of RAC resources like listener/instance and database.
● 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. Extensive experience in configuring
and implementing ASM and
proficiency in using ASMCMD and
ASMLIB
Installation and Configuration of
Oracle 19c Multitenant container
and pluggable databases with Flex
Cluster and Flex ASM.
Experience in implementation of
enterprise databases on enterprise
Storage Solutions using Storage area
Networks (SAN) /Network Attached
Storage (NAS).
Worked actively in configuring and
maintaining Oracle Physical
Standby/Active Data Guard Database
oracle 12c.
Developed database
monitoring/health check alert
scripts for database
uptime/downtime status, and sizing
issues using grid control (OEM) and
extensively used Oracle Enterprise
Manager to do the daily tasks
regarding the performance,
maintenance
Performing Fault Injection Test
Cases for verifying the High
Availability at each layer of RAC
stack like port failover, instance
failover, ASM failover, and Node
failover
Experience in Extracting,
Transforming, and Loading (ETL)
data using SQL loader utility
Upgrading and migrating Oracle
12cR2 RAC Databases running on
legacy infrastructure to Oracle 19c
Pluggable Databases running on the
latest platforms
Experience in Identifying
performance bottlenecks on high
volume transaction systems. Analyze
SQL statements and design indexes
to improve the response of queries
Automated monitoring of Golden
Gate process and heartbeat
monitoring.
Experience in Installation of Oracle
Databases 11g, 12c, and 19c versions
Experience in the Upgrade of Oracle
Databases in patch set Level and in
● Installation and use of High Availability and Disaster Recovery components; Oracle GRID Infrastructure / Clusterware, Oracle 12c two node RAC for the database tier.
● Planning and implementing DR & high availability solutions using Oracle 11g /12c Standby Database using Dataguard.
● Installed GoldenGate on 12c RAC and Various Standalone environments. Configured Integrated Extract and Replicat on Multitenant database 12.1.0.2 and Performed Cross platform migration and used Oracle GoldenGate to migrate database from IBM-AIX 6.1 to OEL 6.1.
● Configured Bidirectional Oracle Golden Gate Replication Active/Active across various sites with Conflict Detection and Resolution (CDR).
● Configured Extract, Pump, Replicat for GoldenGate replication 11g/12c and Troubleshooting issues in GoldenGate Environment.
● Used Logdump Utility to investigate data on the trail and defgen to create definition files used for replication.
● Tuned performance of RAC and non RAC databases. Found bottlenecking queries that impede application performance and fine-tuned them.
● Periodically clone multi-terabyte databases to QA and UAT.
● Troubleshooting application SQLs and database performance tuning, table partitioning, table space reorg Used SQL TRACE, TKPROF, EXPLAIN PLAN utilities for optimizing and tuning SQL queries.
● Used Automatic Workload Repository (AWR) and Automatic Database Diagnostic Monitor (ADDM), ASH report, SQL tuning advisor, SQL access advisor, Segment advisor, SQL profiles, SQL baselines, SQLT reports, TOP, SAR, VMSTAT, IOSTAT, GLANCE for Performance tuning
● Implemented Logical and Physical Standby Databases for RAC cluster on Sun Solaris platform using Data Guard feature of Oracle 11g R2.
● Successfully performed data replication using Materialized views and Oracle Streams in Oracle 11gR2.
● Cloned/Migrated databases using RMAN and traditional Data Pump export/import utilities in Oracle 11gR2.
● Perform RMAN operations (Incremental Backups). Helped developer to install Oracle Client, troubleshoot and establish the connection to Oracle database through ODBC, JDBC.
● Performance tuning for optimized results using tools like EXPLAIN PLAN, SQL*Trace, TKPROF, STATSPACK, AWR and ADDM reports.
● Database tuning, Application Tuning & performance monitoring. Fine tuning Initialization parameters, I/O, Memory and Operating System kernel parameters.
● Implemented and troubleshooting Data Guard (Standby) for high availability/disaster recovery purpose.
Education
Master of Science in Health Informatics, University of Maryland Global Campus, 2019
Bachelor of Science in Health Information Management, Purdue University Global, 2014
CERTIFICATIONS:
• CompTIA Security+ CE Certified
• Registered Health Information Administrator
• Oracle certified Associate
• Oracle Cloud infrastructure certified-Associate
• AWS Solution Architect-Associate
version Level (11g to 12c) and (12c
to 19c).
Good Experience in applying patches
like Critical Patch Updates (CPU),
Patch Set Updates (PSU), and One-
Off Patches, Interim patches, DST,
Patch sets as per the Oracle
recommendations.
Design and implementation of
Backup and Recovery strategies
(both cold and hot backups) and
performing a periodical backup,
restoration, and recovery using
RMAN (full and incremental
Testing and implementing different
physical and logical backup and
recovery methods including point in
time, media recovery, full/partial,
Datapump export/import
Configuration and Management of
Data Guard on RHEL, OEL
Extensive experience with Database
Cloning and Refreshing pre-
prod/dev databases with prod/pre-
prod databases.
Extensive experience in the
installation and implementation
OEM and TOAD and setup of Oracle
Grid Control
Proficient in using various database
Utilities like EXPORT/IMPORT,
DataPump, TOAD
Implementation of Flashback
Technology, Log Miner, Automatic
Database Diagnostic Manager
(ADDM).
Proactively monitoring the
database's health and taking
preventive or corrective actions
Proficient in Database Design
(Physical and Logical Database
Design) and Normalization
Expert experience in Hot and Cold
Backup and Recovery, cloning of
databases using RMAN, Veritas
NetBackup, and IBM Tivoli Storage
Manager (TSM).
Used EXPDP&IMPDP to take backup
at database level or tablespace level
and to accomplish table level and full
database de-fragmentation
• Medical Biling and coding Diploma
Technical Skills:
• Tuning Tools: TKPROF, EXPLAIN PLAN, AWR, ASH, and ADDM
• Tools and Utilities: RMAN, OEM, SQL*Loader, SQL*Plus, EXP/IMP, Data pump, TOAD, Oracle SQL Developer, pg_dump, pg_backrest, pgBadger, pgpool, REPMGR
• RDBMS: Oracle 10g, 11, 12c PostgreSQL 9-12
• Operating Systems: RHEL, UNIX (Solaris, AIX, HP-UX), LINUX, Windows.
• Hardware: Sun Fire 15K, Sun 6320 Storage, Sun Enterprise Servers 890/880/420/450, Hitachi, EMC, Dell Servers, Compaq Servers 6000/3000/1600/800, HP/UX-9000, Red Hat Linux 6.2
• Remote Tools: Cisco VPN, Checkpoint VPN, Remote Admin, VNC, Remote Desktop, VMware Virtualization.