oracle performance tuning tips

no hidden danger of even slight performance degradation.2.2 ExampleIn the previous section, if Shmmax and sga,oracle create multiple shared memory segments, we can use IPCS-SA to see the number of shared memory segments.(1) View[Email protected] ~]# cat/etc/sysctl.conf | grep Kernel.shmmaxKernel.shmmax = 20971520[Email protected] ~]# Ipcs-sa------Shared Memory Segments--------Key shmid owner perms bytes na

MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization techniques

Label:MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization techn

Tags: temp dispatch variable mysqld equals unnecessary configuration of extension testOriginal link: https://m.aliyun.com/bbs/read/300762.html MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divid

Label: MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization tech

Tags: tabs Other applications ABS SSE contains increased data process structure understandingThe parameters of the tuning function in the Oracle database system are called initialization parameters, and the database administrator needs to properly adjust these initialization parameters to optimize the Oracle system according to the actual situation.1 introduction

MySQL is a powerful open-source database. With more and more database-driven applications, people have been pushing MySQL to its limits. Here are 101 tips for adjusting and optimizing MySQL installation. Some of the techniques are specific to the installation environment, but these ideas are generic. I've divided them into several categories to help you master more of the tuning and optimization techniques

the Set TRACE function in Sqlplus analysis of performance and index usage of statements by toad or PL/SQL developer not satisfied with Oracle default optimizations you can force the use of hint, but it is generally not recommended It is generally not recommended to index a field that stores only or no information for flag. You can use bitmap indexing if necessary * There is a recursive query situation

Oracle Adjusts Oracle's competition One of the benefits of Oracle is that it manages the free space in each table space. Oracle handles the space management of tables and indexes so that we don't have to understand the internal workings of Oracle's tables and indexes. However, for an experienced Oracle

51CTO Learning notes--Linux operation troubleshooting ideas and system tuning tips video Lessons650) this.width=650; "src=" Https://s1.51cto.com/images/201611/25208e84076a9820fec7594656b44c32427a85.png "alt=" 25208E84076A9820FEC7594656B44C32427A85.P "/>First lesson Linux operation and maintenance experience sharing and thinking1, the general host name, write to the hosts under the 127.0.0.1 hostname, becaus

relate to the World Cup scoring players in the club's performance, to the first form of association, first know Ronaldinho's ID number, and then find the corresponding club performance. Table 1, a row of data to the corresponding to the 1 columns of data in table 2, table 2 of the 1 columns of data to the corresponding table 1 of the 1 rows of data, in the two large tables in the million bar, this associat

SQL execution is slow, how fast and accurate optimization. SQLHC is one of the best tools. By getting all the SQL execution plans, list the actual performance bottlenecks, listing the number of rows on the table where SQL resides, the data and distribution of each column, the existing index, the actual execution of SQL-time, IO, and the number of rows returned. Specific use of reference Document 1366133.1 SQL

. The customer provided an AWR report during peak hours. After careful analysis, it was found that it was a high-CPU-consuming SQL statement, which only took 85% of the CPU, this gives us an in-depth understanding of SQL optimization. We have also done some DB optimization before, basically through analysis tables, index creation, parameter adjustment, PATCH, and so on. However, this time, it lasted for a week. After learning for a few days, it has not been solved yet. Finally, I decided to stud

The Oracle tutorial being looked at is Oracle Database performance optimization Technology Developer Network Oracle. Introduction: Fine Place to start, skillfully place diligently. The difference between Master and rookie is: Master know everything, rookie know some. Computer tips