INTRODUCTION
- SQL tuning is the process of improving SQL queries to accelerate your servers performance. It’s general purpose is to reduce the amount of time it takes a user to receive a result after issuing a query, and to reduce the amount of resources used to process a query.
- There are many ways for performance tunning.
TO CHECK BLOCKING SESSION
- SP_WHO
- SP_WHO2
1. CREATE INDEX
- IN OBLECT EXPLORER,
- DATABASE NAME > TABLES > SELECT TABLE > INDEX
- RIGHT CLICK INDEX >NEW INDEX > CLUSTER OR NON-CLUSTER
- SELECT NAME FOR INDEX
- SELECT COLUMN FOR INDEX
INDEX CREATED
2. FRAGMENTATION
FRAGMENTATION < 30% – REORGANIZE
FRAGMENTATION <>30% – REBUILD
REORGANIZE:
- REARRANGE THE EXISTING INDEX
REBUILD:
- DROP THE EXISTING INDEX AND RE-CREATE NEW INDEX
RIGHT CLICK CREATED INDEX > PROPERTIES
FRAGMENTATION IS 16.67%
REORGANIZE THE INDEX
AFTER REORGANIZE, FRAGMENTATION IS 0%
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