db2 performance tuning tips

third-party applications running on Linux, there are many performance tuning techniques that can help you improve the performance of your Linux servers and lower your operating costs.14. Correct configuration of MySQLTo allocate more memory to MySQL, you can set the MySQL cache size, and if the MySQL server instance uses more memory, reduce the cache size and in

single processor system, hash connections only use dedicated sortheap. In SMP systems (where intra-parallel = ON and dft_degree> 1), hash connections use shared sortheap in the first phase of the operation, and dedicated sortheap in the last phase. For more information about these parameters, see the Administration Guide: Performance provided with DB2 UDB.How can we optimize these parameters? Like most

performance. Therefore, increase the value of the LOCKLIST parameter as much as possible. It must be noted that the LOCKLIST parameter is not the number of locks, A memory area is a database page (each lock requires 96 bytes in a 32-bit system, and each lock requires 48 bytes for locking. In a 64-bit system, each lock requires 128 bytes. For locking and locking, each lock requires 64 bytes ). The MAXLOCKS parameter corresponds to the LOCKLIST paramet

behavior does bring more trouble for subsequent adjustments.7. Keep in mind the decrease rule of return. Remember, the most efficient performance tuning results often come from your initial efforts. Subsequent adjustments will result in a gradual reduction in earnings and more efforts.Adjusted DB2 UDB System ConfigurationAfter

DB2 database is locked for upgrade in the following two scenarios:1) when an app's lock is used by the memory >locklistxmaxlocks2) memory >locklist used by multiple application locksWhat happens if a lock is upgraded?As this is the mechanism of self-control of the database, we inadvertently enjoy the benefits of the same time, is often plagued by this mechanism. It is obvious that, once the system concurrency and

A graduation on the contact optimization problems, professional optimization also has at least 5 years of time, but now still often hear many people think that optimization is very simple, is to build index problem, it really can not blame everyone, do this line for more than 20 years, at every stage of career, almost can hear such a voice, In many books have also seen such a statement, but here I want to tell you: optimization is not just index, optimization is not very simple thing, this job r

System Performance Tuning for CentOS servers Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux and Windows is that, by default, a Linux server does not provide a GUI (graphical user interface) but a command line interface. The main purpose of the GUI is to efficiently process non-interactive processes. The r

-party applications running on Linux, there are many performance tuning techniques that can help you improve the performance of your Linux servers and lower your operating costs.14. Correct configuration of MySQLTo allocate more memory to MySQL, you can set the MySQL cache size, and if the MySQL server instance uses more memory, reduce the cache size and increase

Over the past few years, many books have been produced to discuss best practices in DB2 design and implementation, including a large number of books and articles. These books delve into how to design DB2 and integrate it into an application. To provide some basic guidance for customers and business partners to understand, this article compiles a series of best practices to consider when using ibm®

Sun's technology day in Sydney, Gosling said many tools now use JDBC to connect to the database, using APIs to enable SQL statements to execute, which 9.15 Useful MYSQL/MARIADB performance tuning and optimization tips Introduction: This article will show you some basic, but very useful tips on how to optimize MYSQL/M