Database Performance Troubleshooting Methodologies and Dimensions

When You have assigned a task to optimize a database or performance tuning of an application. Then there could be various dimensions to perform this task because slow performance of application could be many more which can not describe on single page but it can be summary in a table like below I found this table that shows database performance and slow running application performance dimension and there activity start procedures.

Performance Dimensions	Percentage Values	Process Strength	Activity Strength	Remarks
Application Design and Business process	25.00%	Long Process	Lower priority	Module wise activity.
Database Schema Design - Logical	15.00%	Medium	Follow best practices	Required short downtime Module wise activity.
Database Maintenance	15.00%	Quick process	Required on OLTP	Short downtime weekly or monthly.
Indexing	15.00%	Quick process	Required on OLTP	Short downtime weekly or monthly Module wise activity.
Server Hardware (CPU/Memory/other)	12.00%	Medium process	Follow best practices	Long process and dependency on business process infrastructure & organization financial plans.
Database Physical Layout (file/group)	7.00%	Medium	Follow best practices	Required short downtime Dependency on all application modules.
Platform Virtualization vs physical	6.00%	Medium process	Follow best practices	Long process and dependency on business process infrastructure & organization financial plans.
IO Subsystem Design/Tuning(RAID )	5.00%	Medium process F	ollow best practices	Long process and dependency on business process infrastructure & organization financial plans.

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