Case study

MariaDB slow queries causing SaaS dashboard timeouts

Database performance issues can make a SaaS product feel unreliable even when the application server is still online. The priority is to identify expensive queries, resource pressure and safe tuning changes without risking production data.

Context

A SaaS dashboard started timing out during normal customer use, especially when loading reports and admin views.

The application was still running, but database response times had become unpredictable and customer-facing pages were intermittently slow.

The problem

  • Slow queries were affecting dashboard and reporting pages during busy periods.
  • The database server showed signs of CPU and memory pressure under normal application load.
  • Indexes, table sizes and query patterns needed to be reviewed before changing server configuration.
  • The customer needed a practical improvement plan rather than risky trial-and-error changes.

Our approach

  • Reviewed MariaDB version, server resources, configuration, table sizes, indexes and slow query output where available.
  • Identified query patterns and application routes most likely to cause dashboard delays.
  • Recommended safe indexing, query review and configuration changes based on the observed workload.
  • Checked backup and rollback considerations before suggesting production database changes.

Practical outcomes

Clearer performance bottlenecksThe customer could see whether the issue was query design, indexing, configuration or server capacity.
Reduced timeout riskThe most expensive database paths were prioritised for safe tuning and application review.
Safer change planDatabase changes were separated into low-risk improvements and items needing developer review.
Recommended follow-upSlow query monitoring, backup checks and regular database review were recommended as the application grows.

Relevant technologies and keywords

These are the main technologies, services and search terms connected to this case study.

MariaDBSlow queriesSaaS dashboardDatabase tuningIndexesTimeoutsReportsQuery performanceLinuxBackupsMonitoringApplication performance

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