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Over all 17 years of IT experience as a Sr.PostgreSQL DBA , Sr.MySQL DBA , Mongo DBA , Sql server & Sr. Oracle Database Administrator, RAC Administration and Application DBA on various platforms. 10+ Years of expertise in PostgreSQL with knowledge of installations and Configurations on various platforms along with the implementation of DR setup etc. 7+ Years of expertise in MySQL with knowledge of installations and Configurations on various platforms. Hands on experience in Master-to-Master replication. When I joined this project, it was not good the DB Performance wise. But now I completely got the insight and improved my DB Performance up to 35%. I am supporting to the administer applications and also helping application teams to run the solutions faster.. I focus to monitor the bloats and to remove them using PG_REPACK utility without a downtime. Scheduled the daily gather stats frequently using tables in non-peak hours and also scheduled the same job on all table in every Sunday. We always maintain High availability at cluster level. We regularly test the failover mechanism. Major task to monitor and set the notification on replication. If we see a lag at replication level we will get an email notification and also teams alert. I reduced the IOPS cost based on the writes at table level. Expert in Performance Monitoring and Tuning of PostgreSQL Databases on Unix/Linux platform. Experience in Database Performance Tuning, Optimization, Query rewriting and Troubleshooting. Oracle Exadata, RAC Expert in Oracle database technologies aspect. Having expertise skill in Install, Configure, Upgrade, Migrate, Maintain and Support Oracle Databases, related tools and products on various Infrastructure platforms. Expertise in support Oracle Real Application Clusters and Oracle Exadata Machine environment includes cell nodes administration which is hosting critical applications of database environments for Investment Banks & Financial Institutions. Hands on experience in GoldenGate configuration and support. Strong experience in configuring, integrating, and maintaining all Development, QA, Staging and Production PostgreSQL databases within the organization. Knowledge in implementing, configuring, and troubleshooting database instances, replication, backup, partitions, storage, and access. Proficient knowledge in migrating data from different RDBMS to PostgreSQL using Golden gate. Hands on experience of database backups and Recovery strategies using RMAN, Hot Backup, Export, and Transportable Tablespace. Experienced in Capacity Planning, Configuration, Installation, Upgrades and High Availability (HA) solutions and Backup & Recovery, performance tuning & Cloning. Expertise at database administration activities such as monitoring database instances activity for blockers, waiting sessions, locks, dead locks, services start-up problems, Cluster management, connectivity problems, and max session reached errors etc… Expert in Performance Monitoring and Tuning of Oracle Databases on Unix/Linux platform Performance Tuning using SQL Tuning Advisor, Statspack, ADDM and AWR report Plan, test & implement the database Backup & Recovery strategy depending on the database size. Checking the daily, weekly, monthly backup status

Accomplished Senior Oracle DBA with extensive experience at JPMorgan Chase & Co, specializing in performance tuning and backup recovery. Proven track record in leading teams through Agile transformations while enhancing database efficiency. Expert in Oracle 19c and skilled in collaboration, driving operational excellence and reducing costs through automation.

Around 10 years of experience in the Information Technology of various fields like healthcare, utility, and Telecom as an DBA(Oracle/PostgreSQL/Cassandra/Cosmos DB /Couchbase) on large scale databases supporting high volume transactions. Over 5 years of experience as Goldengate DBA. Over 4 years of experience as a cloud DBA supporting PostgreSQL, Cassandra, Cosmos DB, Couchbase on Azure Cloud. Migrated oracle Databases to Oracle/Azure Cloud using export and import data process. Migrated lot of on-prem oracle databases to PostgreSQL on Azure Cloud. Migrated oracle database from Solaris to Linux using expdp/impdp and Goldengate replication with zero downtime. Setup monitoring and backup configuration for PostgreSQL database on Azure cloud. Monitoring Cassandra database using Grafana Dashboards. Automated Goldengate monitoring setup using bash scripts. Configured and supported Unidirectional Oracle Golden Gate Replication between oracle databases. Good knowledge on implementing Oracle Golden Gate and Oracle Data guard. Installing & Configuring Oracle Golden Gate 12c using Integrated Extracts & Replicats. Troubleshooting issue with Replication across sites and Performance Tuning on Oracle Golden Gate. Created Cosmos databases and containers and supported various deployments on Azure Cloud. Created and Administered 12C/18C Container with pluggable database. Performing Backups, Cloning using RMAN for Oracle Databases. Adding additional instances on RAC databases without downtime. Expertise in Logical and Physical Backup schedules using Import/Export, Data Pump and RMAN. Experience in Oracle database Performance Tuning using AWR, ADDM, Explain Plan, SQL TRACE, TKPROF, SQLTXPLAIN and different OEM utilities. Good Knowledge in creating PL/SQL Procedures, Functions, Packages, Views, Materialized Views and Triggers. Worked with developers to troubleshoot performance issue (SQL Queries) using AWR, ADDM, ASH and SQL Tuning Advisor. Responsible working with user groups, analyzing reported problems, performing root cause analysis and presenting alternatives to correct the problem. Created Cursors, Collections and database triggers for maintaining integrity constraints and implementing the business rules. Involved in scheduling batch jobs using Unix/DBMS scheduler. Performed code deployment activities and sanity check across DEV, UAT, ST & PROD environments. Good knowledge in writing shell scripts for monitoring database and perform backups. Coordinate with application team and stake holders to gather requirements, design, data conversions, programming, System/integration/user acceptance testing, documentation, production support in PostgreSQL/Cassandra/Cosmos DB /Couchbase migrations.

5 years of Experience as DBA in Oracle 10g/11g/12c/19c on various platforms like Unix, Linux and Windows. Committed to excellence in Database Administration with a strong background in administrating, troubleshooting, managing Oracle 11g, 12c & 19c - Exadata X6, X7, X8-M and ZFS-Storage.

Saikrishna Mandadi

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Oracle DBA

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Oracle DBA

Master of Business Administration - undefined

Bachelor of Technology - Computer Science

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