Views in DB2 are primarily used to simplify complex queries by presenting a subset of data from one or more tables. They can hide the complexity of underlying table structures and provide a simplified interface for users to access data. 

DB2 employs various concurrency control mechanisms, such as locking and isolation levels, to manage data integrity issues arising from concurrent transactions. By using locks, DB2 ensures that only one transaction can access a specific resource at a time, preventing conflicting updates and maintaining data consistency. Additionally, DB2 supports different isolation levels, allowing users to control the visibility of changes made by concurrent transactions to address consistency requirements. 

DB2 ensures data integrity through various mechanisms such as referential integrity, constraints, and data validation rules. Referential integrity constraints enforce relationships between tables to maintain data consistency, while constraints and validation rules define permissible data values and ensure data accuracy. By adhering to these principles, DB2 maintains the integrity and reliability of the stored data. 

Stored procedures in DB2 are commonly used to encapsulate business logic. Business logic refers to the rules and processes that govern the manipulation and management of data within an application. This can include calculations, validations, and other operations. 

The INSERT INTO statement adds new records (rows) to a table in a database. It is used to insert a new row of data into a specified table with specified values for each column. 

Enabling monitoring tools to capture SQL performance metrics allows the DB2 administrator to identify poorly performing queries during peak hours. These tools can provide insights into various metrics such as execution time, I/O operations, and locking behavior, enabling the administrator to pinpoint the cause of slow query performance. Increasing hardware resources or restarting the DB2 instance may provide temporary relief but may not address the root cause of the issue. Disabling unnecessary applications can reduce system load but may not directly address SQL performance concerns. 

Troubleshooting DB2 installation errors often involves examining log files generated during the installation process. Log files contain valuable information about errors, warnings, and other diagnostic messages, aiding in identifying and resolving installation issues. 

In DB2, XML or JSON format can store any structured data, including textual, numerical, or binary data. This flexibility allows for versatile data storage and retrieval. 

Understanding the different editions and versions of DB2 is essential for effective database management. It enables administrators to make informed decisions about configuration, resource allocation, and performance tuning. By knowing the capabilities and limitations of each edition/version, administrators can optimize the database environment to meet the organization's needs efficiently. 

The primary purpose of the installation process in DB2 is to install the necessary files onto the system. This includes executable files, libraries, and other resources required for DB2 to operate correctly.