What database performance improvement methods are available under high CPU load?

During intensive CPU load, the following methods can be used to improve database performance:

• Query optimization: rewrite heavy queries, add indexes, use more efficient operations.
• Caching: use caching for frequently requested data (e.g., Redis) to reduce database load.
• Parallelism and asynchrony: distribute the load, use connection pools.
• Database parameter tuning: increase buffer sizes, configure memory and parallelism settings.
• Vertical and horizontal scaling: add resources to the server or distribute the database across multiple nodes.
• Monitoring and profiling: identify bottlenecks and optimize them.

Example of query optimization in Java using JDBC:

String sql = "SELECT * FROM users WHERE status = ?";
try (PreparedStatement stmt = connection.prepareStatement(sql)) {
    stmt.setString(1, "active");
    ResultSet rs = stmt.executeQuery();
    while (rs.next()) {
        // process result
    }
}

It is also important to analyze the load and properly balance resources.