oracle performance tuning tutorial

With the SPA, you can play specific types of changes depending on the type of change (such as initialization of change, optimizer statistics refresh, and database upgrade)SQL or the entire SQL payload, and then generate a comparison report that helps you evaluate their impact.In the version number prior to Oracle Database 11g, I had to capture all the SQL statements and execute them by tracing,Then get the run plan-this is a very time-consuming and er

With SPA, you can play a specific stream based on various types of changes (such as initialization parameter changes, optimizer statistics refresh, and database upgrades)SQL or the entire SQL load, and then generate a comparison report to help you evaluate their impact. In versions earlier than Oracle Database 11g, I must capture all SQL statements and trace and run these statements,Then get the execution plan-this is an extremely time-consuming and e

The ORACLE tutorial is: Oracle SQL Performance Optimization Series III. 8. Use the DECODE function to reduce processing timeYou can use the DECODE function to avoid repeated scan of the same record or join the same table.For example:Select count (*), SUM (SAL) FROM EMPWHERE DEPT_NO = 0020And ename like 'Smith % ';Selec

The ORACLE tutorial is: Oracle performance optimization. We have reason to believe that the adoption of the new kernel version (2.2.16-3 smp) should also improve the performance: OS2: Newer minor version kernel TPC ResultsLoad Time (second) 9.40Transactions/Second 11.522 At

of new products. Finally, hardware is evolving, such as the maturing of flash technology, where flash memory can be used as a cache between disk and memory, or a complete replacement for disk. And the memory price is getting lower and bigger, the in-memory cache or database is more and more widely used, which can bring the order of magnitude performance improvement to the application. The IO problems faced by the database will be greatly improved.Ref

The ORACLE tutorial is: Excellent Oracle performance. Increasing the SGA buffer seems to have not significantly improved the performance, and the loading time has only increased by 1.73%. Next we will increase the size of the SGA redo log: DB3: Log BufferDatabase Block Size

The ORACLE tutorial is: Oracle performance optimization. We have reason to believe that the adoption of the new kernel version (2.2.16-3 smp) should also improve the performance:OS2: Newer minor version kernel TPC ResultsLoad Time (second) 9.40Transactions/Second 11.522At present, the kernel version 2.4 is available. C

The Oracle tutorial you are looking at is Oracle performance optimization. Increasing the SGA already buffered appears to be less significant for performance, with only a 1.73% increase in loading time. Below we increase the size of the SGA redo log: Db3:log Buffer Database

Label:Before very silly very naïve thought is nothing more than a distance, and then compare out on the line, and then when the access to a lot of users, and the database in the latitude information a lot of time, the rapid increase in computational capacity, can make the server completely stupid, or old-timer experience than we rich, gave me a great revelation.MySQL Performance tuning – distance calculatio

MySQLDBA Tutorial: Mysql Performance Optimization-cache parameter optimization bitsCN.com Databases are IO-intensive applications. their primary responsibilities are data management and storage. We know that the time for reading a database from the memory is microseconds, while reading an IO from a common hard disk is in milliseconds. The difference between the two is three orders of magnitude. Therefore, t

parameter descriptionTable space Performance vs. non-standard block size tablespace creationTable space Migration process (data files vs. objects)Table space Maintenance and status checksOracle-managed files (OMF)What if the system and the Sysaux table space are full?How do I handle a temporary tablespace when it is full?Default temp table space too large to handleThis article is from the Oracle Database t

Database tool sysbench installation tutorial and performance testing example sysbench is a modular, cross-platform, multi-thread benchmark testing tool that is mainly used to evaluate the database load of different system parameters. For details about this project, see: http://sysbench.sourceforge.net. It mainly includes the following testing methods:1. cpu performance2. disk I/O performance3. Scheduler Pe

oracle| Performance | optimization 46. Connect multiple Scans If you compare a column to a limited set of values, the optimizer may perform multiple scans and concatenate the results. Example: SELECT * From lodging WHERE MANAGER in (' Bill GATES ', ' KEN MULLER '); The optimizer may convert it to the following form SELECT * From lodging WHERE MANAGER = ' BILL GATES ' or MANAGER = ' KEN MULLER ';

This article mainly introduces the MySQL performance analysis tool profile tutorial, this article describes how to use MySQLprofile, does not involve specific sample analysis, if you need it, you can refer to the analysis of SQL execution overhead, which is an important means to optimize SQL. In MySQL databases, you can configure the profiling parameter to enable SQL profiling. This parameter can be set at

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