oracle replication 12c

Tags: Oracle 12c Installation Checklist off iptables NetworkManager selinuxservice iptables stopchkconfig iptables offservice NetworkManager stopchkconfig NetworkManager off modify/etc/selinux/config file change selinux=enforcing to selinux= Disabled restart machine to create Oracle user groupadd-g oinstallgroupadd-g 501 dbauseradd-g oinstall-g dba oraclepasswd

Tags: MoS unique oracl product Memory server app not strEnvironment is 12.2.0.1 version, Oracle Data guard Main Library patrol found alert with abnormal error: 2018-07-10t13:24:04.710366+08:00Errors in FILE/U01/APP/ORACLE/DIAG/RDBMS/DWDB/DWDB1/TRACE/DWDB1_M000_4455.TRC:Ora-00245:control file backup failed; In Oracle RAC, Target might not is on shared storageRemov

------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id unusable 0 1--Rebuilding the indexsql> ALTER index IDX_PANDY_ID rebuild;Index altered.--View index statusSql> Select Table_name,index_name,status,blevel,leaf_blocks from user_indexes where index_name = ' IDX_PANDY_ID ';table_name index_name STATUS Blevel leaf_blocks------------------------- ------------------------- -------- ---------- -----------P_andy idx_pandy_id VALID 0 1--Truncate multiple

Differences between a transaction-based temporary Oracle table under 11 GB and 12CThe transaction-based temporary tables in Oracle differ from those in 11g and 12C. After collecting statistics on the temporary tables, the former records are cleared, and the latter does not, this is an important difference. 12C is used

Issues with CDB User Creation and tablespace allocation in Oracle 12c Database In Oracle12c, the concept of database plug-in is added, that is, PDB, which allows a database container (CDB) to host multiple pluggable databases (PDB ). CDB is called ContainerDatabase, and the Chinese translation is a database container. PDB is called PluggableDatabase, which can be used to plug and unplug the database. Before

Tags: val alter err enhanced nbsp char des create visibleIn Oracle 11g R1, Oracle introduces some nice enhancements in the form of invisible indexes and virtual fields. Inheriting the former and carrying forward, Oracle 12c introduces the idea of invisible fields. In previous releases, in order to hide important data f

Oracle 12c In-Memory Oracle introduced the In-Memory and columnar compression option In 12c, which greatly improves query performance. Here, we can see how much performance can be improved in the same query through a comparison. 1. allocate Memory to In-Memory firstSQL> show parameter inmemory;NAME TYPE VALUE----------

The new features of In-database archiving are introduced in Oracle Database 12c, which allows users to archive data by marking data rows on the table as inactive inactive. These inactive data rows can be compressed into one optimization and are not visible to the app by default. This feature enables the functionality and requirements of this "tag delete" in the case of minimal changes to existing code.Befor

Tag:tabreadossmanage copy optionsonslinebase $ Sqlplus '/as sysdba ' sql*plus:release 12.1.0.1.0 Production on Tue June 13:03:06 2015Copyright (c) 1982, Oracle. All rights reserved. Connected to:oracle Database 12c Enterprise Edition Release 12.1.0.1.0-64bit productionwith The partitioning, OLAP, Adva nced Analytics and Real application testing optionssql> show Con_name; Con_name---------------------------

) (host=oracle12c) (port=5500)) (Security= (my_wallet_directory=/u01/app/ Oracle/admin/orcl/xdb_wallet)) (presentation=http) (Session=raw))Services Summary ...Service "7351E8AE5372218EE0539B6BA8C08D05" has 1 instance (s).Instance "ORCL", status ready, have 1 handler (s) for the This service ...Service "ORCL" has 1 instance (s).Instance "ORCL", status ready, have 1 handler (s) for the This service ...Service "Orclxdb" has 1 instance (s).Instance "ORCL"

Oracle 12C multi-index with the same column In Oracle 12c, Oracle provides the ability to create different indexes on the columns of the same table for SQL Performance Optimization, but only one index is visible. The following is an exampleConnected:Oracle Database

Before 12c, if you want to achieve the automatic growth of column, usually through sequence, but this problem is solved in 12c, Oracle postponed the identity column feature, which perfectly solves the previous problem, the following is my simple test, For reference! Sql> Alter pluggable database all open;Pluggable database altered.Sql> select Name,open_mode from

Oracle 12C r2-new features-pdb disk I/O (iops,mbps) resource managementIn previous versions, there was no easy way to control the amount of disk I/O used by a single PDB. As a result, a PDB may run out of disk I/O and affect the performance of other PDB in the same instance. The Oracle 12c R2 can control the amount of

/asm-diskechmod 660/DEV/ASM-DISKFchmod 660/dev/asm-diskgForgot to edit the kernel parameters vi/etc/sysctl.confFs.file-max = 6815744Kernel.sem = 250 32000 100 128Kernel.shmmni = 4096Kernel.shmall = 4294967296Kernel.shmmax = 4398046511104Kernel.panic_on_oops = 1Net.core.rmem_default = 262144Net.core.rmem_max = 4194304Net.core.wmem_default = 262144Net.core.wmem_max = 1048576FS.AIO-MAX-NR = 1048576Net.ipv4.ip_local_port_range = 9000 65500This article is from the "vmware/

Environment: WIN7 64-bit + Oracle 12c (12.1.0.2.0)Mode: Graphical InstallationLog on to the system as an administrator:1 Double-click the setup.exe in the database directoryRemove the check for "Receive security updates" and click Next.2 Wait for some time to appearI have an error INS-30131 here:For example, after starting the Server service, normal:3. 5.6.7.8.9. Note that the password set he

Oracle 12c Installation Checklist off iptables NetworkManager selinuxservice iptables stopchkconfig iptables offservice NetworkManager stopchkconfig NetworkManager off change/etc/selinux/config file change selinux=enforcing to selinux= Disabled restart machine to create Oracle user groupadd-g oinstallgroupadd-g 501 dbauseradd-g oinstall-g dba oraclepasswd

Label:Oracle Data Integrator 12c installation (ODI installation)Enterprise Edition installation steps (including standalone installation steps)Download Oracle Data Integrator 12CR2 (12.2.1.0.0) address on official website For example, when installing ODI, there are two options, the first is a standalone installation, just install the Oracle Data Integrator 12cr2,

The problem originates from a 12c database of the customer and needs to be booted to a non-real time apply mode, but the discovery is performed:ALTER DATABASE recover managed standby database cancel;ALTER DATABASE recover managed standby database disconnect from session; After that, the database is still working in the real time apply mode. Went to the alertlog for a while, found the answer: Thu June 09 12:16:03 2016Errors in FILE/CUST/MYDB/RDBMS/

Label:In previous versions, the parent table could not be truncate directly when there was a foreign key constraint. In 12C, a cascade operation attribute was added to the truncate operation. If you create a FOREIGN key constraint, use "on Delete Casacde". Test script: Sql>drop table child; SQL>drop table parent; SQL>CREATE TABLE parent (ID number primary key); SQL>CREATE TABLE Child (CID number primary key,pid number); SQL>ALTER TABLE child add cons

In addition to using DBCA to delete the Oracle 12C database, we can also use the drop database Command to delete it.This deletion method is very simple, but must meet the following two requirements:1. The database must be in the mount State and cannot be in the open state;2. The database must be inRestricted mode.[Oracle @ rhel6u4 ~] $Sqlplus/as sysdbaSQL * Plus: