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Donald K. Burleson
Oracle Tips |
Disk Space Availability
More installations are probably messed
up due to disk space availability than any other cause. Disk
fragmentation doesn’t seem to be a problem under UNIX or NT, however
I do suggest you defragment any NT system that has been in operation
for extended periods of time prior to the Oracle installation unless
you are installing to fresh disks. With most modern systems, disk
space is allocated dynamically. This means that as a file needs
space, it is granted space wherever it is available on a disk. On
active systems, where files are created, updated, and deleted or
moved to different disks, this results in fragmentation. This can
result in problems for the DBA on NT systems since most aren’t
provided with a disk defragmentation tool.
The Oracle DBA User Account
Other than the ADMINISTRATOR on NT, or the ROOT or SUPERUSER account
on UNIX, the Oracle DBA account, usually called ORACLE, will be one
of the most powerful accounts on the system. This is required due to
the Oracle system being more like an operating system than just a
set of executables. In order to start up and shut down, create the
required files, and allow global sharing of the kernel and perhaps
the tools, the Oracle DBA account needs much broader privileges than
a normal user account. The account must have the privilege to create
directories, files, and other system objects, as well as the ability
to place objects in shared memory.
This is an
excerpt by Mike Ault’s book “Oracle
Administration & Management”. If you want more current Oracle tips
by Mike Ault, check out his new book “Mike
Ault’s Oracle Internals Monitoring & Tuning Scripts” or
Ault’s Oracle Scripts Download.
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