You're dealing with urgent system performance issues. How do you safeguard data integrity in the process?

Assessment of such problems should be done in early stages during instalations of such system such what might be the cause, what will be affected, how long the repair, and how to reintegrate after repair. Knowing whats at risk and whats not already pops up when the trouble happened. So what to do next is decided within seconds.

As a database administrator, when performance issues arise, your immediate priority should be a swift assessment. Start by checking system logs and performance metrics to identify any anomalies. Analyze database query performance using tools like query analyzers to pinpoint slow queries. Examine server resources, including CPU, memory, and disk I/O, for bottlenecks. Ensure that all database indexes are optimized and that statistics are up-to-date. Investigate recent changes in database configuration or workload. By quickly diagnosing the root cause, you can implement appropriate solutions to restore optimal performance and minimize disruption.

It is necessary to evaluate the most recent configuration changes, whether in the database engine or in the increase of processes in the application, it is required to generate a report of the queries and try to identify those that generate the greatest impact on the disk and RAM, evaluate that the indexes and statistics are up to date

Une évaluation rapide est cruciale pour comprendre la nature du problème et éviter des perturbations supplémentaires. Cette étape permet d’identifier les symptômes et de déterminer si le problème est lié à des requêtes, des verrous, une surcharge des ressources, ou un autre facteur. Il est essentiel de disposer d'outils de monitoring efficaces et d'avoir une stratégie pour une évaluation rapide des incidents.

A business continuity plan is always good to have in place. If issues arise, they need to be dealt with quickly to assess the potential risks, impact, back-up systems, who has access, implications of shutting down any part of the system; who hosts the system; whether it's local or throughout the organisation and who is best-placed to deal with it in the appropriate manner.

Built in db backup tools maybe very slow in case of huge database. So a quick way to backup is VM snapshot. It not only ensure db but also overall os integrity.

The replication server is the best practice of data recovery and you would work comfortably with this issue. Anyway, the cirticality of the data what makes us be aware of the changes.

Use resumable indexing to have minimal impact due to indexing. Make a bunch of stored procedures out of your troubleshooting collection of queries so you dont have to spend time finding queries during production issues.

Check last changes on system. Last health reports comparison with current reports. Update fix on hardware/operating system/application gap