Using -X command-line options
Use these options to configure the OpenJ9 virtual machine (VM). Unlike standard options, options prefixed with
-X are nonstandard and are typically unique to a Java™ virtual
machine implementation. However, in some cases,
-X option names are common to different VM implementations and might have the same function.
For options that take a
<size> parameter, suffix the number with "k" or "K" to indicate kilobytes, "m" or "M" to indicate megabytes, or "g" or "G" to indicate gigabytes.
For example, to set the
-Xmx value to 16 MB, you can specify
-Xmx16777216 on the command line.