How to Check Minimum System Requirements for Oracle in PostgreSQL

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How do I verify my server meets Oracle’s minimum system requirements?

Shows DBAs how to verify that CPU, RAM, disk, and OS settings meet Oracle’s supported minimums before installation.

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Description

Example H2

Example H3

What are Oracle’s minimum CPU, RAM, and disk requirements?

Oracle recommends 2+ CPU cores, 4 GB RAM (8 GB for production), and 10 GB free disk for software plus space for datafiles. Confirm your operating system is 64-bit and listed in Oracle’s certification matrix.

How do I check CPU and memory from SQL?

Run SELECT * FROM v$osstat WHERE stat_name IN ('NUM_CPUS','PHYSICAL_MEMORY_BYTES'); in Oracle. In PostgreSQL you can compare with SHOW max_parallel_workers_per_gather; or query pg_settings to cross-check host capacity before migrating.

Example PostgreSQL check

SELECT name, setting FROM pg_settings WHERE name IN ('shared_buffers','work_mem','maintenance_work_mem');

How do I size storage for an e-commerce workload?

Estimate growth: count rows and average row length in Orders, OrderItems, and Products. Multiply by projected daily inserts. Add 20-30 % overhead for indexes and redo/undo.

Quick size query

SELECT pg_size_pretty(pg_total_relation_size('Orders')) AS orders_size;

Which parameters must meet Oracle’s baseline?

Verify kernel.sem, fs.file-max, and swap ratio at the OS level. Inside Oracle, confirm MEMORY_TARGET ≥1.5 × SGA, PROCESSES ≥150, and SESSIONS ≥1.1 × PROCESSES.

Can I automate requirement checks?

Create a startup script that queries v$osstat, v$parameter, and compares values with a JSON policy. Alert on any mismatch before installs or upgrades.

Best practices for capacity planning

Benchmark typical workloads on staging hardware, monitor AWR/ASH for bottlenecks, and allocate 25 % resource headroom. Review requirements each quarter.

Common mistakes

Under-allocating swap causes ORA-04036 errors. Ignoring file-system block size leads to inefficient I/O. See fixes below.

Why How to Check Minimum System Requirements for Oracle in PostgreSQL is important

How to Check Minimum System Requirements for Oracle in PostgreSQL Example Usage


-- Estimate 30-day order volume to size redo/undo
SELECT COUNT(*) AS last_30_days
FROM   Orders
WHERE  order_date >= CURRENT_DATE - INTERVAL '30 days';

How to Check Minimum System Requirements for Oracle in PostgreSQL Syntax


-- Oracle: check CPU & memory
SELECT *
FROM   v$osstat
WHERE  stat_name IN ('NUM_CPUS',
                     'PHYSICAL_MEMORY_BYTES');

-- Oracle: verify key initialization parameters
SELECT name, value
FROM   v$parameter
WHERE  name IN ('memory_target',
                'processes',
                'sessions');

-- PostgreSQL cross-check for migration readiness
SELECT name, setting
FROM   pg_settings
WHERE  name IN ('shared_buffers',
                'work_mem',
                'max_connections');

-- E-commerce sizing sample
SELECT pg_size_pretty(pg_total_relation_size('Orders')) AS orders_size;

Common Mistakes

Mistake: Relying on free -m output alone.<br>Why wrong: Ignores hugepages and SGA overhead.<br>Fix: Query v$osstat and size MEMORY_TARGET to 60-70 % RAM.
Mistake: Skipping kernel parameter tuning.<br>Why wrong: Default semaphores/file handles throttle sessions.<br>Fix: Set kernel.sem, fs.file-max, and reload before starting Oracle.