Memory and disk space

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

Distributed systems
  • 512 MB of RAM are required to support runtime operations (1 MB equals approximately 1000 000 bytes).
  • 512 MB of RAM are required to support Message Brokers Toolkit operations on Linux (x86 platform) 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 system 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, so you might need to check or change the setting of both these variables.

    If you are installing the Message Brokers Toolkit, you can specify a different temporary space directory when you invoke the installation wizard. Detailed instructions are given in the Installation Guide.

    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 table below, check that your system has sufficient space before you continue with the installation.

    Component AIX HP-UX Linux1+2 Solaris Windows1
    Broker, Configuration Manager, and User Name Server 500 MB plus 300 MB temporary space 680 MB plus 300 MB temporary space 300 MB plus 300 MB temporary space 550 MB plus 300 MB temporary space 310 MB plus 300 MB temporary space
    Message Transformation Services (optional broker extension) 45 MB 50 MB 25 MB 30 MB 30 MB
    Message Brokers Toolkit Not available Not available 5.0 GB plus 1.9 GB temporary space Not available 5.0 GB plus 1.9 GB temporary space
    Notes:
    1. Requirements vary slightly on different Linux offerings; maximum figures are shown.
    2. The Message Brokers Toolkit is available on Linux (x86 platform) and Windows only.
  • 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 Cloudscape require approximately 105 MB.
  • On systems 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 systems.
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 Extension for z/OS.
Related tasks
Installing
Uninstalling