PostgreSQL Server Infrastructure: Hardware, Operating System and Security
Design PostgreSQL infrastructure across Linux/Windows, CPU, RAM, NVMe/SSD, storage latency, WAL, TLS, SCRAM, backup and HA.
What does this guide solve?
PostgreSQL performance is not driven by CPU alone. Memory, working set, storage latency, WAL writes, autovacuum, checkpoints and query/index design all matter.
Operating system
PostgreSQL supports a broad range of platforms; Linux is one of the most common production choices. Enterprise Linux distributions simplify package, security and automation operations.
Windows is also possible; existing automation, monitoring, backup and team skills should guide the decision.
CPU and memory
High single-core performance and sufficient cores matter for OLTP; parallel analytical queries can benefit from more cores.
More memory can improve OS page cache, shared buffers and active-data-set caching, but settings should be measured against the real workload.
Storage and WAL
Low-latency SSD/NVMe is valuable for WAL and random read/write activity. Separating WAL and data storage can help selected workloads.
RAID design, safe write cache, fsync behaviour and virtualization storage latency are critical for durability and performance.
Security
SCRAM-SHA-256 authentication, TLS, pg_hba.conf policy, least-privilege roles and network segmentation form a strong baseline.
Row Level Security, auditing, secret management and OS hardening should be added according to risk.
HA and backup
Streaming replication and controlled failover can provide HA, but HA does not replace backup.
Base backups, WAL archiving and point-in-time recovery should be tested against RPO/RTO targets.
Frequently Asked Questions
Is Linux required for PostgreSQL?
No. PostgreSQL runs on many platforms; Linux is common in production but workload and team requirements matter.
Does PostgreSQL require NVMe?
No, but NVMe can provide substantial benefit for latency- and IOPS-sensitive OLTP workloads.
Does a replica replace backup?
No. Replicas can reproduce logical errors, accidental deletes or ransomware impact; independent backup is still required.
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