IntelliJ IDEA 2017.2 Help

Increasing Memory Heap

To prevent the build process from running out of memory, you can increase the amount of memory allocated to the process. By default, the memory heap is 128 MB, but for large projects you may need more.

In this section:

Increasing memory heap of the build process

  1. Open the Build File Properties dialog box.
  2. In the Maximum heap size field, type the required amount of memory.

Important notes

Please note the following:

The memory heap of the build process is independent of IntelliJ IDEA memory heap, and is released after the build process is complete.

The memory heap available to IntelliJ IDEA may be changed by editing the corresponding VM options.

To avoid editing files in the IntelliJ IDEA installation folder, do one of the following:

  • From the main menu, choose Help | Edit Custom VM Options to create a copy of the idea.vmoptions file in the user home directory.
  • Copy the existing file from the IntelliJ IDEA installation folder somewhere and save the path to this location in the IDEA_VM_OPTIONS environment variable (IDEA64_VM_OPTIONS for 64 bit systems).
  • Copy the existing <IntelliJ IDEA installation folder>/bin/idea.exe.vmoptions or the <IntelliJ IDEA installation folder>/bin/idea64.exe.vmoptions file from the IntelliJ IDEA installation folder into your user home directory.

Then edit this file in the new location.

If the IDEA_VM_OPTIONS (IDEA64_VM_OPTIONS for 64 bit systems) environment variable is defined, or the *.vmoptions file exists, this file is used instead of the one located in the IntelliJ IDEA installation folder.

Last modified: 29 November 2017

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