database capacity planning oracle

Oracle databases are favored by more and more enterprises for their high reliability, security, and compatibility. Many database administrators are concerned about how to maintain excellent performance of Oracle databases. Based on my experience, we suggest you consider the following aspects. I. Partitioning Based on actual experience, the vast majority of da

OLAP is called online analysis, which is actually a report system and BI system. the BI system is a set of products here. both analysis and reports are developed using stored procedures. One is provided online to users, and the other is provided offline to colleagues. Currently, online analysis is not widely used. The data volume involved is relatively small, but the number of users is relatively large. 1. the user only cares about his/her own data, such as the number of purchases, the total amo

Tags: Oracle bare deviceThis document implements the target AIX tablespace: ITDB mode: Capacity expansion scheme for bare devices Author: johncoco Date: 2016/1/291. Query the raw device files used by Oracle database tablespace ITDB , note the bare device files (starting with R) and the area of bare devices (without R)

Oracle databases are favored by more and more enterprises for their high reliability, security, and compatibility. Many database administrators are concerned about how to maintain excellent performance of Oracle databases. Based on my experience, we suggest you consider the following aspects. I. Partitioning Based on actual experience, the vast majority of data s

Tablespace_name; --the total capacity of the query table space select Tablespace_name, sum (bytes)/1024/1024 as MB from Dba_data_files Group by Tablespace_name; --Table Space capacity Query Select Tablespace_name "Tablespace", To_char (Round (bytes/1024, 2), ' 99990.00 ') | | "To_char" (Round (free/1024, 2), ' 99990.00 ') | | ' G ' "existing", To_char (Round (bytes-free)/1024, 2), ' 99990.00 ') | | ' G ' "

when con>100;END LOOP;Dbms_output. Put_Line (' finished ');END; 7. Writing of stored procedures Create or Replace procedure Insertbranch (tablename in varchar2) asCounts number;Num number;BeginCREATE TABLE TempData (column1 nvarchar2,column2 nvarchar2,column3 nvarchar2);Insert TempDatanum: = 1;Select COUNT (*) into counts from TableName;Dbms_output.put_line (' total data ' +counts);While Num Dbms_output.put_line (' Cycle start: ');Dbms_output.put_line (' article ' +num+ ' data ');Select Column1

Summary of methods to maintain excellent performance of Oracle databases: I. Partitioning Based on actual experience, the vast majority of data space in a large database is occupied by a small number of tables. To simplify the management of large databases and improve the query performance of applications, you can use partitioning. The so-called partition is the separation of records in the dynamic table to

Document directory What is FRA? If FRA is full, online logs cannot be archived. When I started the database this morning and found that the database was not opened, I checked the database status: SQL> select open_mode from V $ database;Open_mode----------Mounted SQL> select open_mode fr

1: create a user Copy codeThe Code is as follows:Create temporary tablespace user_tempTempfile 'd: \ app \ topwqp \ oradata \ orcl \ user_temp.dbf'Size 500 mAutoextend onNext 50 m maxsize 2048 mExtent management local;Create tablespace ts_mydbLoggingDatafile 'd: \ app \ topwqp \ oradata \ orcl \ ts_mydb.dbf'Size 500 mAutoextend onNext 50 m maxsize 2048 mExtent management local;Drop user mydb cascade;Create user mydb identified by mydbDefault tablespace ts_mydbTemporary tablespace user_temp;Grant

I learned about Oracle Table Partitioning and object-relational database system. 1. oracle partitioning Oracle partitions are introduced in oracle 8.0. This process physically breaks down a table or index into smaller and more manageable parts. In terms of

A lot of the time, do Oracle DBA us, when the application administrator to inform us that the application is now slow, the database is very slow, when we go to the database to do a few examples of select also found the same problem, sometimes we can not start, Because we believe that the various life rates of the database