oracle performance analyzer

recommended Optimization Method for Oracle. To use CBO well and maximize the efficiency of SQL statements, the timeliness of statistical data must be ensured. Statistical information can be generated using the full calculation method and sampling estimation method. SQL example: Full calculation method: analyzetableabccomputestatistics; Sample estimation method (sample 20% ): analyzetableabcestimatestatisticssample20percent; The full

prepared to improve the query performance.2. Analysis First, check whether the remote Oracle table has an index on the filter field. It has been confirmed that an index exists. Then, the execution plan of the statement is viewed in the SSMS client, as follows: 　　 From the execution plan, we can see that the process is not as imagined. I thought that SQLServer would submit the entire query to the

The authoritative Performance Testing Organization TPC was confirmed on December 3, United States time, the SPARCT3-4Supercluster submitted by Oracle one day before to TPC (number of transactions processed per minute) 30249 Authoritative Performance Testing Organization TPC was confirmed on December 3, us time, Oracle

The most important component of Oracle SQL running time is the time spent preparing new SQL statements for execution. However, if you understand the Inherent Mechanism of executable plan generation, you can control the time spent by Oracle in evaluating the table connection sequence and improve query performance in general. 　　 Prepare the SQL statements for execu

Label:Poptest is the only training institute for developing Test and development engineers in China, aiming at the ability of the trainees to be competent in automated testing, performance testing and testing tools development. If you are interested in the course, please consult qq:908821478, call 010-84505200. 1 Overview of Performance optimizationsThis chapter provides an introduction Toperformance tuning

top transaction panel: load: Indicates the "weight" of the transaction in comparison to othe transactions. A higher weight indicates that it more likely to be run.This Panel can be used to cancel some fixed transaction types. The load column is mainly used to adjust the weights of some transactions in the test. For example, browse product is mainly a select statement, which can increase its weight to indicate more people to query.Several parameters in oewizard:Number of Customers: Number of use

. Select event, total_waits, time_waited, average_wait from v $ system_event where event like 'Log file switch (arch % '; If there is a wait, check whether the storage device that saves the archived logs is full. Add a log file group and adjust log_archiver_max_processes. F. DB_block_checksum = true, which increases the performance burden. (To ensure data consistency, add a checksum to the block when writing data in

Test hardware description:The test uses my machine. The configuration is as follows:CPU: C433Memory: 128 MBHard disk: Cool 2 generation 20GTest Software description:Windows nt server4, sp5, apache 1.3.12, php3.0.15, php4rc1, mysql 3.22.29, and oracle 8.0.5 are used in WIN32.In linux, bluepoint linux1.0, apache 1.3.12, php4rc1, and mysql 3.22.32 are used.Test Code description:A simple table is used. mysql and oracl