Reindexing and Index Maintenance
Understand when and how to perform reindexing, analyze index bloat, and maintain index health for optimal performance.
Keeping Indexes Healthy
Indexes are vital for database performance, but like any component, they need maintenance. Over time, indexes can become less efficient due to fragmentation and 'bloat'.
In this lesson, we'll learn why index maintenance is crucial, how to spot issues like bloat, and how to fix them using reindexing.
What is Index Bloat?
Index bloat refers to wasted space within an index. It occurs when index entries become outdated but are not immediately removed, or when an index structure becomes inefficient.
This 'bloat' can lead to:
- Larger index files, consuming more disk space.
- More I/O operations, slowing down queries.
- Reduced cache effectiveness.
All lessons in this course
- Analyzing Query Plans with EXPLAIN
- Index Usage Monitoring
- Reindexing and Index Maintenance
- Tuning Index Cost with ANALYZE and Statistics