Memory and disk space requirements

Check the memory and disk space that is required for your installation.

Requirements for memory and disk space depend on the installation operating system, and on the WebSphere® Message Broker components that you are installing.

Distributed systems
  • 512 MB of RAM is required to support runtime operations (1 MB equals approximately 1000 000 bytes).
  • 512 MB of RAM is required to support Message Brokers Toolkit operations on Linux® on x86 or Windows®. This specification is the minimum supported level; for improved performance, provide 1 GB (1 GB equals approximately 1 000 000 000 bytes).
  • Disk space requirements are dependent on the components that you install and the working space that is required by those components (for example, for WebSphere MQ queues and persistent messages).

    Check that your computer has at least the space shown in the table below, which provides guidance for both permanent product requirements and temporary space. If you install just one or two of the runtime components, the storage required is reduced by only a small amount. Check that these requirements have not been updated in the latest product readme file readme.html.

    If the installation directory and the temporary space are on the same partition or drive, add together the two figures to check that you have enough space available. If you do not, increase the available storage or change either the location of the temporary space or the installation directory. The temporary files are deleted when installation has completed.

    • On AIX®, HP-UX, and Linux systems, the default temporary space directory is /tmp.
    • On Solaris systems, the default temporary space directory is /var/tmp.
    • On Windows, the default temporary space directory is pointed to by the TEMP system variable. On some systems, the variable TMP exists and is used before TEMP, therefore you might need to check or change the setting of both these variables.

    The installation wizard displays requirements for permanent space, but not for temporary space. If the figure that the installation wizard displays is greater than the figure shown in the following tables, check that your computer has sufficient space before you continue with the installation.

    Component AIX HP-UX on Itanium HP-UX on PA-RISC Linux1+2 Solaris1 Windows2
    Broker, Configuration Manager, and User Name Server 680 MB plus 300 MB temporary space 680 MB plus 300 MB temporary space 820 MB plus 300 MB temporary space 360 MB plus 300 MB temporary space 565 MB plus 300 MB temporary space 370 MB plus 300 MB temporary space
    Message Transformation Services (optional broker extension) 45 MB 50 MB 50 MB 25 MB 30 MB 20 MB
    Message Brokers Toolkit Not available Not available Not available 5.9 GB plus 2.1 GB temporary space Not available 5.9 GB plus 2.1 GB temporary space
    Notes:
    1. Requirements vary slightly on different Linux and Solaris offerings; maximum figures are shown.
    2. The Message Brokers Toolkit is available on Linux on x86 and Windows only. The maximum space shown as the requirement in the installation directory is required by the installation wizard; when it completes, the final allocation of permanent space is approximately 3.85 GB.
  • If you install one of the database products supplied with WebSphere Message Broker, you need additional disk space:
    • DB2® Enterprise Server requires approximately 300 MB. This specification is for a Compact installation, which provides sufficient function for WebSphere Message Broker; if you choose a Typical or Custom installation, additional storage might be required.
    • On Windows, ODBC (Open Database Connectivity) drivers for the Derby database require approximately 105 MB.
  • On computers on which you create a broker, approximately 10 MB is required for the broker tables. If you create user databases that are accessed by message flows, additional space is required on those computers.
  • If you intend to create more than one broker on any one computer, you will need additional memory and swap space. For example, you might create more than one broker at different versions to complete migration. Plan for 1 GB RAM and 1 GB of swap space for each broker, in addition to the space and memory requirements of other applications.

    You might need to increase these figures if you deploy complex message flows to the brokers, or if you process large messages (of many megabytes) or complex messages that contain many different tags.

z/OS®
See the section about DASD storage requirements in the Program Directory for WebSphere Message Broker for z/OS or the Program Directory for WebSphere Message Broker with Rules and Formatter for z/OS.
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Last updated : 2009-01-07 15:21:57

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