- How to simplify the installation of Oracle Database 12c or 11g on Oracle Linux 6 by installing the oracle-rdbms-server-12cR1-preinstall or oracle-rdbms-server-11gR2-preinstall RPM package, which automatically performs a number of tasks, such as installing required software packages, resolving package dependencies, and modifying kernel parameters.
- 53 DBMSLOCK. The DBMSLOCK package provides an interface to Oracle Lock Management services. You can request a lock of a specific mode, give it a unique name recognizable in another procedure in the same or another instance, change the lock mode, and release it.
The DBMSLOCK package provides an interface to Oracle Lock Management services. You can request a lock of a specific mode, give it a unique name recognizable in another procedure in the same or another instance, change the lock mode, and release it.
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The
SLEEP
procedure is added to the DBMS_SESSION
package and deprecated from the DBMS_LOCK
package in Oracle Database 18c.Related articles.
DBMS_SESSION.SLEEP
![Lock Lock](https://blogs.sap.com/wp-content/uploads/2018/09/2018-09-28_14-41-28.png)
The
SLEEP
procedure is added to the DBMS_SESSION
package, so it is available to all sessions with no additional grants needed and no dependency on the DBMS_LOCK
package.The procedure suspends the session for the specified number of seconds. The seconds parameter can accept any valid number, including fractions of a second.
As pointed out by Paul in the comments, if you specify a value of greater than 3600 when using
DBMS_SESSION.SLEEP
you get a 'ORA-38148: invalid time limit specified'. This is not the case for the DBMS_LOCK.SLEEP
procedure.DBMS_LOCK.SLEEP
The Oracle 18c documentation no longer lists the
SLEEP
procedure in the DBMS_LOCK
package, but it is still present for backwards compatibility. It is now deprecated, so you should transition your code to use the DBMS_SESSION
package instead, and revoke any grants to the DBMS_LOCK
package where they were only granted to give access to the SLEEP procedure.Why was this necessary? The
DBMS_LOCK
package was not accessible by default, so an explicit grant was necessary for a session to use it. By giving access to this package, you also give the grantee the ability to execute the other subroutines in the DBMS_LOCK
package, which affords them quite an excessive level of functionality just for the ability to suspend their session for a few seconds.For more information see:
Hope this helps. Regards Tim..
Package Manager is software which allows a user in case of installation of new software, up-gradation of system, or updating any specific software and such sorts of things. In case of Linux based systems wherein one software has lots of dependencies which are required to be present on system for a complete installation of that software, such software’s like package manager become a much needed tool on every system.
Each Linux Distribution ships with its default package manager for above stated functionalities, but of all these most found ones are: yum on RHEL and Fedora systems (where it is being currently replaced with DNF from Fedora 22+ onwards) and apt from Debian.
If you’re looking for APT tool to block or disable certain specific package updates, then you should read this article.
Dnf or Danified yum is replacing yum on Fedora systems which is another one in our list. If explored properly, these Package Managers can be used for following functionalities:
- Installing new software from the repository.
- Resolve dependencies of the software by installing those dependencies before installing the software.
- Maintaining database of dependencies of each software.
- Downgrade version of any existing software.
- Upgrading the kernel version.
- Listing packages available for installation.
We’ve already covered detailed articles separately on each individual package managers with practical examples, you should must read them to control and manager package management in your respective Linux distributions.
Read Also:
In the article, we will see how to lock/disable certain package updates using Yum package manager in RHEL/CentOS and Fedora systems (applicable till Fedora 21, later newer Fedora version ships with dnf as default package manager).
Disable/Lock Package Updates using Yum
Yellow dog Updater, Modified (yum) is package management tool in RedHat based distributions such as CentOS and Fedora. Various strategies used to Lock/Disable Package Updates using Yum are discussed below:
1. Permanently Disable Package for Install or Update
1. Open and edit the
yum.conf
file, which is located in /etc/yum.conf or in /etc/yum/yum.conf.It looks like below:
Here, to exclude certain package from installation or up-gradation, you just need to add exclude variable along with name of package you wish to exclude. For example, if I want to exclude all the
python-3
packages from getting updated, then I will just append following line to yum.conf
:![How To Install Dbms Lock Package How To Install Dbms Lock Package](https://docs.oracle.com/cd/E16754_01/doc.75/e16706/img/ins_infranet_production.gif)
For more than one package to exclude just separate their names by space.
Note: to include these packages, ignoring entries in
yum.conf
, use “-disableexcludes” and set it to all|main|repoid, where ‘main’ are those entered in yum.conf and ‘repoid’ are those whose exclusion is specified in repos.d directory, as explained later on.Now let’s try to install or update the specified packages and see the yum command will disable them installing or updating.
2. Temporarily Disable Package for Install or Update
2. Above was a permanent solution to exclude a package as unless file is edited, that package won’t get updated. Here is a temporary solution for this also. Just at the time when you go for any update, use
-x
switch in yum command to exclude package which you do not want to update, like:The above command will update all the packages whose updates are available, excluding
python-3
on your system.Here, for excluding multiple packages, use
-x
multiple times, or separate package names with ','
in a single switch.3. Using
--exclude
switch works same as -x, just need to replace -x with –exclude and pass ','
separated list of package names to it.3. Disable Package Updates using Repository
4. For any package installed from any external source via adding a repository, there is another way to stop its up-gradation in future. This can be done by editing its
.repo
file which is created in /etc/yum/repos.d/ or /etc/yum.repos.d directory.Add the exclude option with the package name in the repo. Like: to exclude any package say wine from epel repo, add the following line in
epel.repo
file:How To Install Dbms Lock Package In Nigeria
Now try to update the wine package, you will get error like shown below:
4. Disable Package Update Using versionlock Option
5. Another way in yum to mask the version of any package thus making it unavailable for up-gradation, is to use
versionlock
option of yum, but to do this, you must yum-plugin-versionlock package installed on the system.For example, to lock the version of package say httpd to 2.4.6 only, just write following command as root.
Sample Output
To view locked packages, use the following command will list the packages which have been version locked.
How To Install Dbms Lock Package 2017
Sample Output
Conclusion
These are a few tips which will help you Disable/Lock Package updates using yum package manager. If you have any other tricks to do the same things, you can comment them with us.