PHPStorm/Webstorm increase memory to more than 512MB

Question

I\'m using PHPStorm under Win7 64bit with 64bit Java (latest version I guess) and working currently on an insanely big and chaotic project

Answer 1

PhpStorm 2016.1 and newer

As of PhpStorm 2016.1 instead of WEBIDE_JDK_64 one should use JAVA_HOME environment variable that should point to your JVM path.

Versions prior PhpStorm 2016.1

Like it was mentioned in the @LazyOne's answer, as of PhpStorm v8 (already released), you can use PhpStorm64.exe. But I wasn't able to find any description on how to specify the JVM path for it. The document that explains how to select the JDK version, seems to be a bit outdated.

After some research, I discovered that you should create WEBIDE_JDK_64 environment variable that should point to the JRE 64-bit installation path. After doing this, you will be able to start PhpStorm64.exe.

By default it sets max memory to 750mb. If you need more, you can modify the C:\Program Files (x86)\JetBrains\PhpStorm 8\bin\PhpStorm64.exe.vmoptions. The better idea, however, would be to edit your user's vmoptions file. Just copy C:\Program Files (x86)\JetBrains\PhpStorm 8\bin\PhpStorm64.exe.vmoptions to %USERPROFILE%\.IntelliJIdea12\idea.vmoptions and set -Xmx750m to a higher value.