You **Since 7.4** you can also set the heap size on a Xpert.ivy Server running on Windows Axon.ivy Engine by using an *.ilc file. See [this chapter][1] in the server guide for more information. [jvm.options][3] files
For Linux have a look at **Before 7.4** you need to use the *.ilc file for windows [this chapter][2] in chapter][1] and the Server Guide*.conf file for linux [this chapter][2].
[1]: https://developer.axonivy.com/doc/latest/EngineGuideHtml/misc.html#misc-toolreference-ilc
[2]: https://developer.axonivy.com/doc/latest/EngineGuideHtml/misc.html#misc-toolreference-unixhttps://developer.axonivy.com/doc/latest/EngineGuideHtml/misc.html#misc-toolreference-unix
[3]: https://developer.axonivy.com/doc/latest/engine-guide/configuration/files/jvm-options.html