db2 performance tuning

Performance Tuning is not a simple task. There is no omnipotent solution at all, but you can use some basic principles to implement it. In general, performance tuning is the role of DBA. however, DBA does not have time to carefully check every change made to the stored procedure. so learning some basic

The class "Performance Tuning for large-scale and high-traffic Internet sites" is the last good class I attended. I thought this class was mostly about background services, in fact, I am mainly talking about client optimization. I mainly talk about 14 standards. I vaguely felt where I met these 14 standards. Then I checked google, it is true that these 14 items are not new, but they are not too concerned 《

Performance issues with Java EE applications are a very important issue for serious projects and products. In particular, enterprise-class applications, concurrent users, a large number of data transmission, business logic complex, occupy more system resources, so performance problems in enterprise-class applications become critical, it and the stability of the system has a direct link. More importantly, th

cache = max memory * 50% Procedure cache size = max memory * 20-30% Number of user connections = N (default = 25) Number of lock = N * Maximum number of locks required by a single user * 120% (Generally, this is difficult to estimate. The reference value provided by senior syabse engineers: 1.8 million for users. I estimate that 100000 is recommended for 10 Gb of data) Number of open objects = 10000 Number of open indexed = 10000 This configuration can basically be used normally. You can down

Today we are going to discuss with you the actual operation methods for improving the IMPORT command performance of two DB2 database applications, when using the IMPORT Command provided by DB2 to IMPORT related data, all constraints must be verified, and all loaded rows will be logged. The trigger is also activated. Therefore, when loading a large amount of data,

into 1000 only one property.3. When we display a list of CLR objects (such as list) in a list (such as a ListBox), the ListBox also dynamically reflects this change if you want to modify the list object. At this point, we should use a dynamic ObservableCollection object binding. Instead of updating Itemsource directly. The difference between the two is that updating itemsource directly causes WPF to discard all the data that is already in the listbox and then reload all of it from the list. The

Chapter 2 procedural performance tuning of PL/SQL applications I. Reasons for PL/SQL Performance problems When the execution efficiency of PL/SQL-based applications is low, it is usually caused by poor SQL statements and programming methods, poor understanding of PL/SQL basics or misuse of shared memory. Bad SQL statements in PL/SQL PL/SQL programming see

As an excellent web framework, ANGLARJS can greatly simplify the burden of front-end development. Recently Sebastian Fröstl in a blog post "Angularjs performance tuning for Long Lists" that anglarjs in the processing of large lists containing complex data structures, they run very slowly. He also shared the solution in the text. The following is a translation of the text. Anglarjs is great, but it can run

are some bugs, is not necessarily applicable to the core of the online system.3. DRBD Disk Network mirroring schemeAdvantage: Software is powerful, data is mirrored across physical hosts at the underlying fast device level, and different levels of synchronization can be configured according to performance and reliability requirements. IO operations are kept in order to meet the database's demanding data consistency.Disadvantage: Non-Distributed File

Some small aspects of database Performance tuning:1. 1 Performance IndexDatabase performance is generally measured in two metrics: response time and throughput. The faster the response, the greater the throughput and the better the database performance. Response time and thr

This article mainly introduces three basic operations to improve the IMPORT command performance of the DB2 database, if you are interested in the three basic operations to improve the IMPORT command performance of the DB2 database, you can click the following article to view it. In a partitioned database environment, y

Label:Original: SQL Server performance Tuning (i)--judging system resource bottleneck from waiting stateView the status of all SQL Server tasks at that time (sleeping, runnable, or running) through the DMV2005, 2008 provides the following three view Tudon detailed query: DMV Use Sys.dm_exec_requests Returns information about each request that is executed in SQL Serve

Original article: http://www.mastertheboss.com/jboss-performance/jboss-as-7-performance-tuning JBoss Application Server Tuning Although many architects and software engineers agree that the performance of about 70-80% of applications depends on the code of the application it

last few lines of each test result. Pay special attention to the memory, which easily exceeds the memory configuration] Using login values from ~ /. My. cnf-Initial login attempt failed-Testing for stored webmin passwords:None FoundCocould not auto detect login info!Found potential sockets:/tmp/mysql. sockUsing:/tmp/mysql. sock # I believe you can understand the following items, but I will not explain them.Wocould you like to provide a different socket? : [Y/N] nDo you have your login handy? [Y

MySQL performance tuning primer script is a simple and easy-to-use mysql optimization tool. In fact, it is a shell script. Download: $ Wget http://www.day32.com/MySQL/tuning-primer.sh Run $ Sh tuning-primer.sh all After running the command, you will be asked about the mysql user name, password, and preferably mysq

Basically, the main considerations for Hibernate performance tuning are as follows:? database Design Tuning? HQL optimization? Proper use of APIs (e.g., different collections and query APIs based on different business types)? Main configuration parameters (log, query cache, fetch_size, batch_size, etc.)Map file optimization (ID generation policy, Level two cache,