PostgreSQL - Database

What is PostgreSQL?

PostgreSQL is an advanced, open-source object-relational database that has been in active development since 1986. It is known for full ACID compliance, extensibility, and advanced data types.

First released

1986

Type

Object-Relational

License

PostgreSQL License

Standards compliance

SQL:2016 Standard

#4

DB-Engines Ranking

35+

Years of Development

ACID

Compliance

See PostgreSQL advantages

PostgreSQL fully complies with ACID principles (Atomicity, Consistency, Isolation, Durability). This means every transaction is either fully committed or fully rolled back. Data is never left in an inconsistent state, even in case of system failure.

Business Benefits

Guaranteed business data integrity, no lost transactions, regulatory compliance

PostgreSQL offers the richest feature set among open-source databases: support for JSON/JSONB, GIS extensions (PostGIS), full-text search, Common Table Expressions (CTEs), window functions, array types, and custom data types.

Business Benefits

Fewer external services, faster development, one system for many use cases

PostgreSQL can handle billions of records. It supports read replicas, clustering (Patroni, Citus), table partitioning, and parallel queries. Trusted by Instagram (1.5 TB of data), Skype, and Reddit.

Business Benefits

Grow without costly migrations, lower infrastructure costs

PostgreSQL allows creating custom functions in multiple languages (PL/pgSQL, Python, JavaScript). It has a rich extension ecosystem: PostGIS (GIS), pg_stat_statements, TimescaleDB. Easily adaptable to specific requirements.

Business Benefits

Tailored to unique business needs, fewer technical limitations

PostgreSQL has been evolving since 1986, backed by a strong community of experts. Annual releases, long-term support, and extensive documentation make it one of the most stable open-source projects in history.

Business Benefits

Confidence in long-term support, easier hiring of skilled specialists

PostgreSQL is trusted by leading global tech companies. Apple uses it for iCloud, Instagram for billions of photos, Reddit for its comment system. Proven under the toughest enterprise workloads.

Business Benefits

Proven reliability in production environments

PostgreSQL offers significantly more configuration options than MySQL. This provides greater control but also requires more expertise to fine-tune. Parameters like shared_buffers, work_mem, and maintenance_work_mem require understanding.

Mitigation

Use tools like PGTune, consult experts, performance monitoring

Most applications run well on default settings; optimization is only needed under heavy load

PostgreSQL stores more metadata and uses more advanced data structures. This translates into higher RAM usage, especially with a large number of concurrent connections.

Mitigation

Connection pooling (PgBouncer), proper shared_buffers settings, memory monitoring

RAM is relatively cheap today, and the benefits outweigh the costs

In some benchmarks of simple SELECT operations, MySQL (especially with MyISAM) can outperform PostgreSQL. This comes from differences in data storage and transaction management approaches.

Mitigation

Proper indexing, query optimization, use of materialized views, application-level caching

Differences are usually marginal, and PostgreSQL’s advanced features often compensate

PostgreSQL has more advanced features, which means there’s more to learn. Concepts like VACUUM, tablespaces, extensions, and custom types can be overwhelming for beginners.

Mitigation

Gradual feature adoption, team training, documentation and tutorials

The learning investment pays off with greater flexibility and capabilities

PostgreSQL uses Multi-Version Concurrency Control (MVCC), which means old record versions must be periodically cleaned up via the VACUUM process. This adds maintenance overhead, especially for write-intensive applications.

Mitigation

Autovacuum (enabled by default), proper vacuum settings, disk space monitoring

Modern PostgreSQL versions have much better autovacuum, making this less of an issue

Web Applications and E-commerce

Scalable web applications, e-commerce systems, SaaS platforms

Instagram (Django + PostgreSQL), Reddit, Spotify, Apple iCloud

Data Analytics and Business Intelligence

Data warehousing, time-series data, reporting, dashboards

Financial analytics, IoT data processing, marketing attribution

GIS and Location-Based Applications

Maps, spatial analysis, location-based apps, GPS tracking

Uber ride matching, Foursquare check-ins, real estate platforms

Enterprise and Fintech Systems

Financial systems, ERP, CRM, compliance-heavy applications

Banking systems, insurance platforms, government databases

E-commerce & Logistics

OMS system for thousands of operations per minute

Higher fulfilment automation, better control of operational exceptions, and more predictable execution at growing volume

View case study

Marketing Automation SaaS

AI marketing and campaign builder for e-commerce

Faster campaign launch, more automation for the marketer workflow, and a product ready to keep scaling through integrations, AI, and new communication channels

View case study

Business Automation

ERP system with electronic document workflow

Simba ERP

Accounting process automation, integration with external systems

View case study

PostgreSQL is an advanced, object-relational database open source project, developed since 1986.

Main features:

Full ACID compliance (transaction reliability)
Advanced data types (JSON, arrays, custom types)
Extensible – supports custom extensions
Cross-platform (Linux, Windows, macOS)
Standards-compliant SQL

Nicknamed: "The world’s most advanced open-source database"

PostgreSQL: better for complex applications, analytics, standards compliance

MySQL: simpler setup, may be faster for simple reads

PostgreSQL excels at:

Advanced data types (JSON, arrays, PostGIS)
Complex queries and window functions
Full ACID compliance
SQL:2016 standards compliance
Extensibility and custom functions

Choose PostgreSQL if: you’re building a complex app, need advanced SQL features, plan analytics, or require strict ACID compliance.

Technical advantages:

Full ACID compliance (guaranteed data consistency)
Advanced features (JSON, GIS, full-text search)
High scalability (billions of records)
Extensibility (custom functions, extensions)
Enterprise-grade reliability

Business benefits:

No vendor lock-in (open source)
One system for many use cases
Long-term stability (35+ years)
Compliance-ready for regulated industries

Used by: Instagram, Apple, Reddit, Spotify, Uber in production.

Main drawbacks of PostgreSQL:

More complex setup compared to MySQL
Higher RAM consumption
May be slower for simple SELECTs
Steeper learning curve
VACUUM maintenance overhead

Real impact: Instagram runs billions of users on PostgreSQL, so for most apps these "drawbacks" are not an issue.

Mitigation: Modern tools (PgBouncer, autovacuum, PGTune) reduce most issues.

Choose PostgreSQL when:

You need advanced SQL features
Your app requires full ACID compliance
You plan data analytics or reporting
You work with GIS/location data
You need JSON storage with indexing
You’re building an enterprise application

Alternatives:

MySQL: simpler apps, read-heavy workloads
MongoDB: document-first applications
Redis: cache, sessions, real-time

PostgreSQL expert rates in Poland: competitive on the market, vary by seniority level

Typical projects:

Migration from MySQL: small project budget
Web app + PostgreSQL: small/medium project investment
Data warehouse setup: medium/large project budget
Performance tuning: small project investment

Cost factors:

Schema and data model complexity
Performance and scalability requirements
Migration needs from other systems
External system integrations
Compliance requirements (GDPR, etc.)

Considering PostgreSQL for your product or system?
Validate the business fit first.

In 30 minutes we assess whether PostgreSQL fits the product, what risk it adds, and what the right first implementation step looks like.

PostgreSQL: practical guide to enterprise adoption | SoftwareLogic