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wait for scn ack is a waiting event that may be common in RAC environments, meaning waiting for a SCN response across instances. Top 5 Timed Events Avg %Totalr ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time Wait Class ...

Original text: ASM disk header Author: Bane Radulovic Translator: Zhuang Peipei, Pre-sales Engineer of Waukee Science and Technology Database, is mainly responsible for database platform architecture design, product validation and testing. Revision: Wei Xinghua Chief Editor: Qian Shuguang amdu - ASM Metadata Dump Utility ASM Metadata Du ...

A few days ago, when my department colleagues were working on the project, the customer asked to migrate the single instance + ASM database to RAC+ASM. After that, the God sorted out some ideas and operation details and published them on the company's public number. I saw itching in the future, so I planned to do an experiment ...

The BeanUtils toolkit, developed by Apache, is designed to facilitate programmers to easily manipulate Bean classes. BeanUtils has four packages:       org.apache.commons.beanutils       org.apache.commons.beanutils.converters       org.apache.commons.beanutils.locale       org.apache.commons.beanutils.locale.converters Of particular ...

To use the relevant dynamic link libraries in sde, you need to install arcsde and oracle beforehand. 1. Test cases select sde.ST_AsText(SDE.ST_Geometry('POINT (10 10)', 0)) from dual; 2. Configure listener.ora, tnsname.ora and extproc.ora If the following error occurs: ORA-28595: Extproc agent: invalid DLL path ORA-06512: In "SDE. ...

mysql, sql server, oracle, DB2, Access paging technology mysql Remember that limit in mysql starts from scratch The main format is as follows: select * from tablename limit m,n For example, look up lines 6 to 20 select * from tablename limit 5,15 The two right-hand writings are equivalent: sel ...

- Restore content to start In the process of project, we encountered the situation that we need to access two databases in a project. We found that the transaction could not be rolled back properly because of the routine spring management. Therefore, we adopt the distributed data source mode of jta+atomikos to manage the transaction. Make a rec ...

ListIterator interface Official Document Description: An iterator for lists that allows the programmer to traverse the list in either direction, modify the list during iteration, and obtain the iterator's current position in the list. A ListIterator has no current element; its cursor position always lies between the element that would b ...

Use RMAN DUPLICATE... FROM ACTIVE DATABASE Step-by-Step Guide to Creating Physical Standby Databases (Document ID 1526160.1) Apply to: Oracle Database - Enterprise Edition - Version 9.2.0.8 and higher The information contained in this document is applicable to all platforms target How to create a step-by-step guide to physical standb ...

First, install docker. In mac os, you need to install docker through docker-toolbox. You can download docker here. docker-toolbox Download the corresponding version of the pkg file and double-click to open the installation Pictured next can be installed. There are two more items in your Application after installation Pictured ...