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Please review the system requirements below before installing Confluence.

Client Requirements

You can use the following web browsers to access Confluence:

More information about browser support and why rich-text editing is only available for some browsers can be found on the browser support page.

Server Requirements

Confluence works with a broad range of operating systems, database systems and application servers. Provided you have the technical knowledge, it is very likely that you will be able to run Confluence with an 8-year-old database, or even on some 8-year-old hardware. Realistically, it is not technically feasible for us to provide our legendary support service on all environments available. There can only be a finite number of environments and release versions of those that we support.

Our rule of thumb when releasing a new version of Confluence is that we will officially support environments that have been released within the last one to two years (latest version if none released). This does not necessarily mean you need to upgrade your database or application server every time you upgrade Confluence — but if you do run into problems with an unsupported database version or application server version, we may have to ask you to upgrade to something newer.

Example: You run Confluence 2.7.3 on PostgreSQL 8.0, and everything works fine. You decide to upgrade to Confluence 2.8, which is officially supported only on PostgreSQL 8.1.Chances are that you can run Confluence 2.8 with PostgreSQL 8.0 with no problems whatsoever. You can simply try for yourself if you feel that upgrading PostgreSQL at the same time is too much of a hassle. If you run into problems later, we will try to help you even though you are on a officially unsupported platform, and we probably will be able to help you. But if we can't, then we may ask you to upgrade to PostgreSQL 8.1 or 8.2 before we dive deeper into the problem. If you know beforehand that a database upgrade is not viable, then it is best that you consider delaying the upgrade of Confluence.

For further information please also have a look at our Supported Platforms FAQ.

If you feel that the above sounds complicated — how about using our hosted solutions? We can run and maintain your wiki on our servers and deal with all the testing, monitoring and upgrading processes for you! Have a look at our Confluence Hosted website and our integrated JIRA Studio website for more details.

Database

Application Server

Antivirus Software Configuration

Antivirus software greatly decreases the performance of Confluence. Antivirus software that intercepts access to the hard disk is particularly detrimental, and may even cause errors in Confluence.

You should configure your antivirus software to ignore the following directories:

Confluence home directory
Confluence's index directory
All database-related directories

The above recommendation is particularly important if you are running Confluence on Windows. No matter how fast your CPUs are and how many cores they have, antivirus software will always seriously slow down your Confluence performance — sometimes to a point where Confluence is impossible to use.

Server Load

Server load depends primarily on the number of users online at once and their usage of Confluence.

Under 25 concurrent users:

1GHz+ CPU Pentium 4 or equivalent
256MB RAM

Over 25 concurrent users:

Dual 2.4GHz CPU Pentium Xeon or equivalent
512MB+ RAM

Over 100 concurrent users:

Dual 2.4GHz CPU Pentium Xeon or equivalent
4GB of RAM

See Server Hardware Requirements Guide for details.

Refer also to the tips on reducing out of memory errors, in particular the section on Permanent Generation Size.

Disk Space

Confluence Install Directory - 250MB

Install files
Nightly site backups
Temporary files

Confluence Home Directory or External Database - 250MB minimum

Text content
File attachments

Java

Confluence requires a supported version of the JDK (Java Development Kit) to be installed. Confluence supports the following Java versions:

Java 5 (JDK 1.5)
Java 6 (JDK 1.6)

JDK 1.4 is not supported in Confluence version 2.9 or later. Please see Java 1.4 Support Timeline for more information.

Refer to the instructions on installing Java for Confluence.