In which cases is it better to avoid creating new indexes in the database?

Creating new indexes in a database should be avoided in the following cases:

• When the table is updated very frequently (INSERT, UPDATE, DELETE). Indexes slow down write operations as they require additional updates.
• If the index will not be used in queries, it will only increase the load and storage volume.
• When working with small tables where full scan is faster than using an index.
• If the index is created on columns with low selectivity (many repeating values), it may not provide a performance gain.

Always analyze the load and profile queries before adding new indexes.