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What Is Page Size in Database?

Marcus Vance • • 7 min read
What Is Page Size in Database?
Database pages are the internal basic structure to organize the data in the database files. The tablespace consists of database pages with a default size of 16KB. The pages are grouped into extents of size 1MB (64 consecutive pages). The “files” inside a tablespace are called segments in InnoDB.

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Likewise, people ask, what is a page size in memory?

With computers, page size refers to the size of a page, which is a block of stored memory. Page size affects the amount of memory needed and space used when running programs. With web pages, page size (also called page weight) refers to the overall size of a particular web page.

Subsequently, question is, what is Page in SQL Server? Data Pages The Page is the smallest unit of data storage in Microsoft SQL Server. A page contains the data in the rows. A row can only reside in one page. Each Page can contain 8KB of information, due to this, the maximum size of a Row is 8KB. A group of 8 adjacent pages is called an extent.

Simply so, how big is a SQL database?

A SQL Server database can contain a maximum of 231 objects, and can span multiple OS-level files with a maximum file size of 260 bytes (1 exabyte). The data in the database are stored in primary data files with an extension .

What are the types of pages in SQL Server?

As far as I know, there are about 14 types of pages in SQL Server data file.

  • Type 1 – Data page. Data records in heap.
  • Type 2 – Index page. Non-clustered index.
  • Type 3 – Text Mixed Page. Small LOB value(s), multiple types and rows.
  • Type 4 – Text Page.
  • Type 7 – Sort Page.
  • Type 8 – GAM Page.
  • Type 9 – SGAM Page.
  • Type 10 – IAM Page.
Related Question Answers

How large is a page?

Traditionally, pages in a system had uniform size, such as 4,096 bytes. However, processor designs often allow two or more, sometimes simultaneous, page sizes due to its benefits.

What is the maximum size of a page table?

The page table needs one entry per page. Assuming a 4GB (2^32 byte) virtual and physical address space and a page size of 4kB (2^12 bytes), we see that the the 2^32 byte address space must be split into 2^20 pages. This means the page table must have 2^20 entries.
Marcus Vance
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Marcus Vance

Marcus Vance is a cybersecurity auditor and technology writer dedicated to educating the public about online safety, data privacy regulations, enterprise security, and emerging cyber threats.