What is page locking?
The database server stores data in units called disk pages . A disk page contains one or more rows. In some cases, it is better to lock a disk page than to lock individual rows on it. With page locking, the database server locks the entire page that contains the row. …
What are the levels of locking?
Levels of Locking in DBMS
- Database Level.
- Table Level.
- Page-Level.
- Row Level.
How do you lock a wiki page?
To lock a wiki page:
- Navigate to the desired page.
- Click More.
- Click Unlocked. It will changed to Locked. When the page is locked, it cannot be edited.
What is DB locking?
What is the point of database locking? We are locking the data in database while updating to avoid concurrent update problem. Concurrent Update problem is the one where multiple sessions of the database is trying to update the same data at the same time. A DB session is created when a user connects to the DB.
What is a page level lock SQL?
Page Lock. A page lock in SQL Server will lock 8K worth of data even when your query only needs 10 bytes from the page. So your query will lock additional data which you do not request in your query.
What is row level locking?
Row-level locking means that only the row that is accessed by an application will be locked. Hence, all other rows that belong to the same page are free and can be used by other applications. The Database Engine can also lock the page on which the row that has to be locked is stored.
What are the different levels of lock granularity?
Each MySQL storage engine supports different levels of granularity for their locks. MySQL has three lock levels: row-level locking, page-level locking and table-level locking.
What is page level lock in SQL?
How do you lock a page in wiki Fandom?
Well, to protect pages, you need to at least be a content moderator in a specific wiki. Next, go to a random page or the desired page, hover over the drop-down button of the “Edit” button, and click “Protect”. Choose the desired options for the protection and you’re done, the page is protected.
How do you protect all pages in Fandom wiki?
If you are an administrator on your wiki, you can require people to login to an account by going to Special:WikiFeatures and toggling it. This is the only way to “protect” all the pages on your wiki by staying within the terms of use.
What causes DB lock?
When one task is updating data on a page (or block), another task can’t access data (read or update) on that same page (or block) until the data modification is complete and committed. When multiple users can access and update the same data at the same time, a locking mechanism is required.
What is Page lock in SQL Server?
What does it mean to protect a wiki page?
Page protection is the ability to limit who can edit a page. Administrators and Content Moderators have the ability to both protect and unprotect pages should the need arise. The majority of pages on a wiki should remain unprotected to encourage all users in the community to edit.
Which is the default protection level on Wikipedia?
Note that such requests will normally be declined if the protecting administrator is active and was not consulted first. A log of protections and unprotections is available at Special:Log/protect . This is the default protection level, used for the vast majority of pages.
How does cascading protection work on a wiki page?
Cascading protection is a form of page protection that allows you to protect a page so that all templates and images on the page will also be protected without needing to protect them individually. This is useful on pages, such as a wiki main page, where most of the included images and templates are used only on that page.
Where do I find permissions to create a wiki page?
To open the Security dialog, choose More > Wiki Security. For definitions of each repository permission, see Git repository permissions. Don’t have access to create a page?