Practical, production-ready guides on databases, cloud and automation – PostgreSQL, Oracle, SQL Server, MongoDB, CockroachDB, Kubernetes, Azure and AWS.
PostgreSQL
Master PostgreSQL Administration, Performance Tuning, Replication, Backup & Recovery, and High Availability.
Oracle Database
Oracle RAC, ASM, Data Guard, RMAN, Performance Tuning, Migration and Enterprise Database Administration.
SQL Server
SQL Server Performance Tuning, Query Store, Always On, Deadlocks, Indexing and Enterprise Administration.
MongoDB
MongoDB Replica Sets, Sharding, Atlas, Backup, Monitoring and Performance Optimization.
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Performance
Slow Concurrent INSERTs in Oracle: Reverse Key Index vs Scalable Sequence, Measured on 19c
Tested on: Oracle Database 19c Enterprise Edition 19.27, 16 CPUs | Level: Inter…
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PostgreSQL
ParadeDB on Kubernetes with CloudNativePG: Deployment Runbook and a DiskPressure Incident.
This runbook documents the end-to-end deployment of a highly available ParadeDB…
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Shell Scripts
Deploying a Single-Node CockroachDB v26.2 on RHEL for Database Migrations
A single secure CockroachDB node, built by one idempotent script, is the faste…
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- Tamilselvan Perumal
- I'm Tamilselvan Perumal, an Oracle ACE Apprentice and Senior DBA with 12+ years running Oracle, PostgreSQL, SQL Server, MongoDB and CockroachDB for Tier-1 global banks. On TechStarAdmin I share hands-on, production-tested guides on performance tuning, high availability, security and migrations.
