Answer 8 questions to assess the feasibility, complexity, and potential savings of migrating your Oracle databases to PostgreSQL.
$0
PostgreSQL Licence Cost
8
Questions
3 min
To Complete
Question 1 of 8Database Migration Advisory
Question 1 of 8
💾
How many Oracle Database instances are you considering migrating?
Start with the easiest candidates. Not all Oracle databases need to migrate at once.
1–5 databases
5–20 databases
20–100 databases
100+ databases
Phased approach essential
Question 2 of 8
⚙️
How heavily do your applications rely on Oracle-specific features (PL/SQL, Oracle-specific datatypes)?
PL/SQL stored procedures, Oracle-specific functions, and proprietary datatypes are the primary migration complexity drivers.
Minimal — mostly standard SQL with little PL/SQL
Moderate — some PL/SQL procedures and packages
Heavy — significant PL/SQL, Oracle Forms, or Oracle-specific features
Extreme — deeply embedded PL/SQL, Advanced Queuing, Spatial, etc.
Question 3 of 8
📊
What is the size and performance profile of your Oracle databases?
PostgreSQL handles most workloads well, but very large databases or extreme OLTP requirements need careful planning.
Small — under 100GB, moderate transaction volume
Medium — 100GB–1TB, normal workload
Large — 1TB–10TB or high-performance OLTP
Very large — 10TB+ or extreme performance requirements
Question 4 of 8
🏗️
What is the architecture of the applications using Oracle?
Modern, loosely-coupled applications are easier to migrate. Monolithic apps with embedded SQL are harder.
Modern microservices with ORM/abstraction layer
Modern app with some direct SQL
Monolithic application with embedded Oracle SQL
Legacy application with tight Oracle coupling (e.g., Oracle Forms)
May need application rewrite
Question 5 of 8
🔄
Do you use Oracle RAC, Data Guard, or GoldenGate?
Oracle high-availability features require PostgreSQL alternatives (Patroni, pg_replication, Citus).
No — single instance, standard backup
Data Guard only (standby/replication)
PostgreSQL streaming replication is a good alternative
RAC for high availability
Requires Patroni or similar for PostgreSQL
RAC + Data Guard + GoldenGate
Question 6 of 8
👥
Does your team have PostgreSQL experience?
Internal PostgreSQL expertise accelerates migration and reduces risk.
Yes — experienced PostgreSQL DBAs on staff
Some — a few team members have PostgreSQL skills
Minimal — mostly Oracle DBAs
None — Oracle-only skills
Question 7 of 8
💰
What is your current Oracle licensing and support cost for these databases?
The savings from migration to PostgreSQL depend on your current Oracle spend. Higher spend = stronger business case.
Under $250K/year
$250K–$1M/year
$1M–$5M/year
$5M+/year
Strong financial case for migration
Question 8 of 8
📅
What is your target timeline for migration?
Oracle database migrations typically take 6-18 months per major system. Rushing increases risk.
18+ months — strategic initiative
12–18 months — planned project
6–12 months — aggressive but manageable
Under 6 months — very aggressive
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