Performance forensics
Execution plans, slow-query analysis, indexing and workload-aware tuning that turns database noise into measurable action.
Production systems stable
Arjun Mehta / 2026
A database portfolio built around the query
Dig deeper.
Run smarter.
I design and operate database environments where performance, recoverability and reliability are treated as first-class product features, from index strategy to failover drills.
SELECT uptime, latency FROM production;
uptime = 99.99p95_ms = 42status = 'healthy'
01 / Overview
Reliability is
a design decision.
My DBA practice sits between engineering and operations: understand the workload, expose the bottleneck, automate the guardrails, and make recovery boring.
99.99availability target / %
42p95 query latency / ms
7critical migrations
4database engines
02 / Architecture
From raw rows
to resilient systems.
A practical operating model for production databases: map dependencies, tune the workload, protect the data, then rehearse the failure modes before they become incidents.
Data terrain / 04 zones
QUERY PLANNER01
INDEX LAYER02
REPLICATION03
RECOVERY VAULT04
High availability
Replication topologies, failover design, health checks and recovery drills engineered around business-critical workloads.
Migration control
Low-downtime migrations with rollback plans, validation checkpoints and careful sequencing across dependent services.
03 / Work
Case studies
from the query layer.
42ms after the index rethink.
Reworked a high-volume transactional workload by combining plan analysis, selective composite indexes and statistics hygiene. Reduced p95 latency from 180ms to 42ms without changing the application contract.
BTREE / P95 / OLTPFailover without the fire drill.
Built a repeatable HA rehearsal process with replication health checks, documented runbooks and recovery-point validation for a business-critical PostgreSQL environment.
HA / RPO / RTOSeven databases. One calm cutover.
Coordinated a staged migration across dependent services, using shadow validation, controlled read-only windows and explicit rollback gates.
MIGRATE / VERIFY / SWITCHObservability that answers first.
Introduced workload dashboards and alert thresholds around query latency, replication lag, storage pressure and connection saturation.
METRICS / ALERTS / SIGNAL04 / Career
A record of
production thinking.
Senior Database Administrator · Platform Operations
Own production database reliability, performance reviews, HA readiness and migration planning across customer-facing systems.
Database Administrator · Data Infrastructure
Built tuning practices, backup validation routines and operational runbooks while supporting PostgreSQL and MySQL estates.
Systems Engineer · Infrastructure
Started close to the metal: Linux operations, monitoring, storage and the incident-response habits that later shaped a database-first career.
05 / Credentials
Proof, not
passwords.
Production administration, backup strategy, replication and performance troubleshooting.
Managed database architecture, monitoring, security controls and cost-aware operations.
Incident, change and problem-management practices applied to high-impact production systems.
06 / Contact
Have a database
problem worth digging into?
For DBA leadership, database modernization, performance investigations, migration planning or reliability reviews, send a note.
✉ arjun.dba@example.com
☎ +91 11 5550 1936
◈ New Delhi, IN
Typical response: within 2 business days