What Is a Database Health Check? A Guide for SQL Server, Oracle and PostgreSQL

A database health check is a structured review of a database environment’s configuration, backup and recovery readiness, security, performance and high availability, with the findings ranked by risk. The goal is to see problems before they turn into an outage or data loss, and to make clear which improvement should come first.

This guide is for IT managers and database teams running SQL Server, Oracle or PostgreSQL. It covers what a health check should include, what changes from platform to platform, how often to run one and what a good report looks like.

Database Health Check at a Glance

Why You Need a Health Check

Most database problems don’t appear overnight. They build up quietly for months. A disk that is nearly full, a backup nobody has ever restored, a replica nobody watches any more or a report that locks up at month-end are usually noticed only when something breaks.

These are the root causes we see most often in the field:

• Inefficient queries from third-party applications
• No connection pool management: connections are opened, never closed and left sleeping
• Poor transaction handling that causes deadlocks
• No backup policy, so log files fill up or replication stalls
• Replication and Always On performance that nobody monitors
• Disk layouts that ignore best practices, disks that fill up at peak hours and badly set autogrowth
• Missing index maintenance and consistency checks, so corruption is found far too late

None of these is complicated on its own. What makes them dangerous is that they pile up where nobody is looking. A health check makes that build-up visible at regular intervals.

What a Health Check Should Cover

Whatever the platform, a thorough health check should review these eight areas:

Platform-Specific Checks

The eight areas are the same on every platform, but each database has risks of its own.

You’ll find a detailed 12-point checklist for SQL Server in our SQL Server health check guide, and ten core rules for PostgreSQL in our PostgreSQL best practices post.

A Quick Start: Are Backups Really Running?

The first question of any health check is backups. The query below shows, for each database on SQL Server, when the last full, differential and log backups finished. Databases in the FULL recovery model that never get a log backup, or whose last backup is days old, belong at the top of the report.

SELECT d.name AS database_name,
       d.recovery_model_desc,
       MAX(CASE WHEN b.type = 'D' THEN b.backup_finish_date END) AS last_full,
       MAX(CASE WHEN b.type = 'I' THEN b.backup_finish_date END) AS last_diff,
       MAX(CASE WHEN b.type = 'L' THEN b.backup_finish_date END) AS last_log
FROM sys.databases AS d
LEFT JOIN msdb.dbo.backupset AS b
       ON b.database_name = d.name
WHERE d.name <> 'tempdb'
GROUP BY d.name, d.recovery_model_desc
ORDER BY last_full;

On PostgreSQL the same question starts with whether WAL archiving works. Failed archiving silently removes your ability to restore to a point in time:

SELECT archived_count, last_archived_time,
       failed_count, last_failed_time
FROM pg_stat_archiver;

What a Good Health Check Report Looks Like

A health check is only as useful as its report. A raw dump of hundreds of pages ends up as a file nobody reads. A good report has these qualities:

How Often Should You Run a Health Check?

A health check doesn’t replace continuous monitoring. Monitoring shows today’s problem; a health check reveals the system’s structural risks. The two complement each other. We describe which metrics to watch continuously in our SQL Server monitoring checklist.

Do It Yourself or Bring In an Expert?

Your in-house team can and should run the basic checks regularly: whether backups run, how full the disks are and what the error logs say. An independent expert review makes a difference when:

• The team finds it hard to see flaws in a system it built; an outside view spots risks that have become accepted habit.
• The estate runs several database platforms, each needing its own expertise.
• The results will feed an audit, an investment decision or the choice of a service provider.
• The DBA has left and nobody knows the system’s real state any more.

How Aryasoft Runs a Health Check

For SQL Server health checks Aryasoft uses HELT360, a tool we built ourselves as an R&D project at GarajX TEKMER. HELT360 runs read-only, performs configuration checks only and adds no load to the system. Every script it runs can be viewed in its panel, and on request all of its traffic is logged to text files. Findings are reported with timestamps.

On Oracle and PostgreSQL our senior experts review the same eight areas with platform-specific checks. You receive an executive summary, findings in priority order and an improvement plan that starts with the fixes that need no downtime. If you want your environment followed up regularly, the health check is also the first step of our managed database services.

Frequently Asked Questions

Sources

The technical details in this guide were checked against the following official documentation in November 2026.

1. Microsoft Learn: backupset (Transact-SQL)
2. Microsoft Learn: DBCC CHECKDB
3. PostgreSQL documentation: The Cumulative Statistics System (pg_stat_archiver)
4. PostgreSQL documentation: Routine Vacuuming
5. Oracle Database Licensing Information (Diagnostics Pack)