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5 Common Mistakes Made When Creating And Maintaining a SQL Server Database
The creation and maintenance of a SQL server database environment is no simple task. Quite a few parameters regarding troubleshooting, support and design must be considered. Making a mistake in those areas or overlooking certain details and tasks only make the job harder.
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Here are five frequent mistakes that happen with the construction and maintenance of a SQL server database environment. There are certainly more, but these are a few that you should be aware of.
1. No Backup Plan
If you aren't backing up your databases often you are leaving yourself open for disaster. An acceptable backup plan should make backups regularly, be able to find and restore data from backup storage, and also have storage locations other than the database server. Be sure to backup early and often. Situations where backups are unavailable are not good for anyone.
2. Use of Ad Hoc Queries
The database should only be accessed by users through stored procedures on the application level. Ad hoc queries enable users to write their own code against the database with SELECT, INSERT, UPDATE, and DELETE permissions. EXECUTE is the only permission allowed through stored procedures which, in turn, will lead the preservation of the data and also enhanced performance through caching and compiling. The right way to optimize and SQL server is to eliminate a majority or all ad hoc queries.
3. Improper Testing
Just like having a bad backup plan, if you put code in production before it is tested you are putting yourself in a bad spot. Another big mistake is to not allow for the proper beta testing and on-going testing Optimum pre-production testing must mimic production environments as closely as possible. A small database meant for testing purposes probably won't scale well to a fully functional production environment. Testing now is always better than fixing later.
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4. Insufficient Monitoring
There should not be an expectation that your database will be running smoothly with no performance problems. Continued SQL optimization requires regular performance monitoring to ensure a quality end user experience. Lack of or inadequate monitoring runs the risk of applications and queries slowing down performance by consuming too many system resources. SQL server hardware environments and queries need to have constant monitoring and optimization to make certain that performance is as good as it can get. An SQL monitor will enable you to capture performance trends over time so that you can create tuning plans to improve performance.
5. Improper Process for Change Management
Changing a stable production environment should not be done light-heartedly. They require proper planning, testing, and implementation procedures. Having a change management process provides some structure for how changes are made. If database changes don't go according to plan, having the right documentation of how, why and when changes should be made will provide for quick reversions. Thorough pre-production tests must also be a piece in the change management puzzle. Don't forget to document everything that you do.