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Azul Zing System Tools System Requirements

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The ZST component is only needed for the following situations or requirements:

  • Heapsize (-Xmx) larger than 2500 GBytes. With ZST, Zing supports up to 20 TB (20000 GBytes).

  • Static memory reservation for Java heaps at system start.

  • Older OS versions than listed on Zing Operating System Requirements

The Azul Platform Prime with ZST can be installed on machines running the following operating systems using .rpm or .deb installers, as appropriate:

Operating System Versions

Red Hat Enterprise Linux

7, 8, 9



CentOS/CentOS Stream

8, 9

Rocky/Alma Linux


Oracle Linux



12 (SP3, SP4, SP5)


18.04 LTS, 20.04 LTS, 22.04 LTS


9 (Stretch) and 10 (Buster)

Amazon Linux

1, 2



See the complete list of the supported kernels on the Azul Platform Prime Customer Downloads page. You need to obtain a username and password from [email protected] to access the page.

ZST CPU Requirements

Azul Platform Prime with ZST can be installed on machines running the following CPU types.

  • 64-bit x86 CPUs

    • Intel® Xeon® server class processors released 2009 and later.

    • AMD Opteron™ server class processors released 2010 and later.

  • Azul Platform Prime is supported on systems with 2 or more vCores. Systems with higher core counts are obviously going to scale better, and provide lower scheduling related hiccup/jitter behavior.

ZST Memory Requirements

Azul Platform Prime with ZST requires the following amount of RAM:

  • 8+ GB RAM recommended

  • 512 MB hard minimum

ZST Platform Requirements

Azul Platform Prime with the ZST runs on any of the following hardware or virtualized platforms:

  • x86-64 hardware

  • x86-64 virtual machines configured with Intel VT-x or AMD-V (e.g., Amazon EC2 (HVM), Azure, Oracle Virtual Box, Google Compute Engine, VMware)

ZST Kernel Support Timeline

In the vast majority of cases, we release ZST support on the same day as the release of the new version of the Linux kernel. In some cases, we may need additional time to address issues found in testing.