Browser.sessionhistory.max total viewers: Difference between revisions

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==Possible values and their effects==
==Possible values and their effects==
===0===
<!-- Hey! You! This is not the place to change your preferences! You need to do that in about:config. See the top of the article for details. -->
===-1===
<!-- Hey! You! This is not the place to change your preferences! You need to do that in about:config. See the top of the article for details. -->
Automatically determine the maximum amount of pages to store in memory based on the total amount of RAM (Default)
Automatically determine the maximum amount of pages to store in memory based on the total amount of RAM (Default)
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===0===
===0===
<!-- Hey! You! This is not the place to change your preferences! You need to do that in about:config. See the top of the article for details. -->
Do not store any pages in memory.
Do not store any pages in memory.


===Any positive integer===
===Any positive integer===
<!-- Hey! You! This is not the place to change your preferences! You need to do that in about:config. See the top of the article for details. -->
Maximum number of pages to store in memory.
Maximum number of pages to store in memory.


Revision as of 16:17, 22 February 2006

The title given to this article is incorrect due to technical limitations. The correct title is browser.sessionhistory.max_total_viewers.

This article describes the preference browser.sessionhistory.max_total_viewers. To add, delete, or modify this preference, you will need to edit your configuration — do not edit this article.

Background

Pages that were recently visited are stored in memory in such a way that they don't have to be re-rendered (this is different than the cache). This improves performance when pressing Back and Forward. This preference controls the maximum amount of pages to store in memory. On average, one page uses 4MB of memory.

Possible values and their effects

-1

Automatically determine the maximum amount of pages to store in memory based on the total amount of RAM (Default)

RAM Pages
32MB 0
64MB 1
128MB 2
256MB 3
512MB 5
1GB 8
2GB 8
4GB 8

0

Do not store any pages in memory.

Any positive integer

Maximum number of pages to store in memory.

Caveats

  • Lowering this value causes less memory to be used but also causes more previously visited pages to have to be rerendered (thus increasing their load time). Raising it has the opposite effect. One page will on average take 4MB of memory.

Recommended settings

Users who are having problems with memory consumption can try setting the value to something lower than specified in the table above to lower memory consumption. Users who have no problems with memory should leave it at -1.

First checked in

2005-09-23 by Brian Ryner

Has an effect in

  • Firefox (all versions since 1.5b2)
  • Seamonkey (all versions)

Related bugs

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