How to manage DB2 databases (1)

DB2 database is an important "Weapon" for IBM to enter the database field. How to Strengthen the Management of DB2 databases and optimize system performance has become a hot topic, this document analyzes the current situation of DB2 database management and describes how to manage DB2 databases.

Current Situation of DB2 database management

Currently, the relational database market is basically the world of Oracle and IBM DB2. The core of the DB2 database is also known as the DB2 public server. It adopts a multi-process, multi-clue architecture and can run on multiple operating systems, adjustments and optimizations were made based on the corresponding platform environment to achieve better performance.

DB2 database is a key component of the Business System architecture. Therefore, managing and maintaining the DB2 system is the top priority of business system maintenance.

Before a business system goes online, it is often necessary to adjust and optimize database system parameters to ensure the overall system stability and performance, after going online, you need to regularly inspect the database and optimize and adjust the database according to the running status of the system. These jobs often need DBAs that are well-versed in DB2 databases. But do every enterprise really need such professionals? Not necessarily, this senior Database Administrator costs a lot for daily operations of an enterprise, it is not very cost-effective to invest such a large cost only for a few database servers.

How to manage DB2 Databases

DB2 databases provide external services in the form of instances. Each DB2 database server can create multiple instances. The prerequisite for the stable operation of DB2 is that these instances are working normally, therefore, to manage the DB2 database, you must first monitor the current status of each instance.

Each instance of the DB2 database has multiple attributes that need to be focused on, such as the buffer pool, connection, lock, and database space usage.

If the buffer pool hit rate is low, the system has a high performance problem. In general, it is considered ideal to have a buffer pool hit rate greater than 80%, ideally close to 100% (especially for index hit rates ). Therefore, it is of great significance to monitor the system performance.

Similarly, the connection condition of the number of connections ensures the performance of the entire application system. This parameter determines the maximum number of connections to a database at the same time. When the connection usage continues to be 100%, it indicates that the front-end applications may fail to connect. Therefore, you need to increase the number of connections in the database.

Therefore, focusing on the above performance indicators is a prerequisite for ensuring the stable operation of the entire DB2 system.