Explain the difference between a data block, an extent and
a segment.

Answer Posted / kumar.s

Datablock, Extent and Segment
A segment is defined as any entity that consumes physical
storage space within the database.

Each Oracle segment is made up of contiguous chunks of
storage space in the database called extents. Every segment
must have at least one extent, but can have as many as 2
billion extents.

Each extent is itself made up of a collection of smaller
chunks of space called Oracle database blocks. The minimum
size of an extent is five database blocks.

The default size of these database blocks is set at
database creation, but Oracle 10g db can use multiple block
sizes within one db. The common database block sizes are
2KB, 4KB, 8KB, and 16KB.

Is This Answer Correct ?    10 Yes 2 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

CAN AUNIVERSE BE LINKED TO MORE THAN ONE DATASOURCE?

1865


My requirement is like in database some defects are present and i need to clean them.To be brief for example every employee should have active assigments.So for those records which are not having status as active or null ,i need to update the roecords using API with the correct value. Client will provide a flat file for the records whch are defected.So i need to run the API for those records (flat file)and update the data in database. So my question is how to handle this requirement.Is there any existing API for this purpose?If yes then please send me the NAME. How to update the records in the database using flatfile. Any pointer will be appreciated.Thanks in advance.

1992


what are all the conversion and interfaces in GL,AP,AR,HRMS with example? otherwise send send link for these

2088


what are the API of GL,PO,AP

2029


QUESTION IS THAT DURING UPLOADING DATA IN PROD SERVER,OUR EQUIPMENT TAG NUMBERS ARE NOT MATCHING WITH SAP TAG NUMBERS SO DUE TO THIS WE ARE FACING PROB, BECAUSE WHENEVER ALARM IS COMING FROM SCADA DUE MISMATCH THE NOTIFICATION IS NOT CREATED IT IS GIVING ERROR. PLEASE SUGGEST THE METHOD SO THAT THE TAG NUMBERS OF BOTH (SCADA EQUIPMENT AND SAP EQUIP) SHOULD CONCIDE.OTHERWISE WE HAVE TO GO FOR LONG PROCESS EITHER BY INTERFACE TABLE OR BY EXPORTING ALL DATA AND MAKING RIGHT CHANGES.DO YOU HAVE ANY SHORTCT METHOD PL WRITE ME. THANKS

1873


WHAT ALL DIFFERENT KIND OF FUNCTIONS AVAILABLE WHILE DESIGN UNIVERSES?

1913


What is db_recovery_file_dest in oracle? When do you need to set this value?

917


Differentiate between writeoff and receipt writeoff. : oracle accounts receivable

1046


IS IT POSSIBLE TO CREATE REPORTS FROM DIFFERENT UNIVERSES IN ONE DOCUMENT?

2037


we have 10 concurrent programs under one request group out of 10 ccps all users submitting only 9 programs from srs window remaining one ccp for specific user how can it possible send me answer asap.

2152


How many segment are present in Oracle Manufacturing

2090


A scenario for amount correction & how to use amount correction functionality in AP invoices

1919


now iam working as an hr executive in hyderabad i would like to learn oracle hrms kindly suggest me some good institutes in hyderabd

2104


What are the different tools available for hot backups in Oracle? Is it preferable to take it manually all the time or it depends on the size of the database?

1008


can u give guidance abt packages of plsql

1897