Network.http.max-persistent-connections-per-server: Difference between revisions
(→Recommended settings: Adding a warning against anything above 10; we need to give concrete numbers, otherwise people think it's around 50-100) |
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{{preference|pref=network.http.max-persistent-connections-per-server}} | {{preference|pref=network.http.max-persistent-connections-per-server}} | ||
==Background== | ==Background== | ||
[ | [http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol HTTP] is the application-layer protocol that most web pages are transferred with. HTTP keep-alive connections can be re-used for multiple requests, as opposed to non-keep-alive connections, which are limited to one request. Using keep-alive connections improves performance. If a proxy server is not configured, the total number of HTTP keep-alive connections the application can make to each site is limited by this preference. If more connections are needed, they are queued until a connection "slot" is available. | ||
==Possible values and their effects== | ==Possible values and their effects== | ||
Revision as of 12:34, 9 May 2007
Background
HTTP is the application-layer protocol that most web pages are transferred with. HTTP keep-alive connections can be re-used for multiple requests, as opposed to non-keep-alive connections, which are limited to one request. Using keep-alive connections improves performance. If a proxy server is not configured, the total number of HTTP keep-alive connections the application can make to each site is limited by this preference. If more connections are needed, they are queued until a connection "slot" is available.
Possible values and their effects
This preference takes values between 1 and 255 inclusive, directly corresponding to the maximum number of HTTP keep-alive connections the application can have open at once to a single server. (Default: 2.)
Caveats
- This preference only has an effect if you are not using a proxy. If you are using a proxy, see network.http.max-persistent-connections-per-proxy.
- The maximum number of connections of any type to a single server is controlled by network.http.max-connections-per-server.
- The maximum number of connections of any type is controlled by network.http.max-connections, which will always take precedent over this preference.
- This preference has no effect unless Keep-Alive (network.http.keep-alive) is enabled.
Recommended settings
If you are not using a proxy and experience problems not being able to download multiple files, you can raise this value. It is, however, considered poor etiquette to make too many connections to a server and may lead to you being banned from that server. Anything above 10 is excessive.
First checked in
Has an effect in
- Netscape (all versions since 7.0)
- Mozilla Suite (all versions since 0.9.4)
- Mozilla Phoenix (all versions)
- Mozilla Firebird (all versions)
- Mozilla Firefox (all versions)
- SeaMonkey (all versions)
- Camino (all versions)
- Minimo (all versions)
Related bugs
Related preferences
- network.http.max-connections
- network.http.max-connections-per-server
- network.http.max-persistent-connections-per-proxy
