Any expert or experienced database programmer will agree to it that in high-traffic database driven applications, a single badly designed SQL query will significantly impact the overall performance of your application. Such a query consume more database time than it should and can have an exponential effect on the performance of other application components.
Optimizing a query performance wise is heavily dependent on developer’s intuition and statistical performance data. Databases like MySQL come with some tools to aid the process of optimizing queries.
Here are few techniques that can help you to optimize your database query:
- Indexing – MySQL allows you to index database tables, this makes it possible to quickly seek records without performing full table scan first which in return increases the speed of query execution significantly. 16 Indexes per table are allowed and MySQL also supports multi-column indexes and full text search indexes. (Multiple fields can be merged inside one index)
You should remember that indexing is a two side sword, using excessive indexing in every field may adversely affect your systems performance. While avoiding indexes is also a really bad idea, because indexing will speed up query execution.
- Adjusting as per requirement – There are many adjustments that can be made for performance optimization. For queries that include ‘and’ & ‘or’, make sure to prefer variable over characters. Try different values for key_buffer_size for improving and optimizing performance of MySQL queries.
- Limiting with Time – Deciding a time limit for Long Queries (long_query_time). MySQL comes with a ‘slow query log’, which will automatically log all queries that do not end within a particular time limit. This log is useful to track inefficient queries to find targets for optimization algorithms.
HorizonCore InfoSoft has expert database programmers with hands on experience with query optimization and creating a fully optimized query from start. You can contact us for further information on hiring process or for creating a full website from beginning to end. We assure you that the code and queries will be fully performance optimized to provide you with ultimate experience.
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