在IntelliJ 2016及更新版本中，您可以从帮助菜单中更改此设置，编辑自定义属性(由@eggplantbr评论)。

在较旧的版本中，没有GUI可以做到这一点。但是你可以修改它，如果你编辑IntelliJ IDEA平台属性文件:

#---------------------------------------------------------------------
# Maximum file size (kilobytes) IDE should provide code assistance for.
# The larger file is the slower its editor works and higher overall system memory requirements are
# if code assistance is enabled. Remove this property or set to very large number if you need
# code assistance for any files available regardless their size.
#---------------------------------------------------------------------
idea.max.intellisense.filesize=2500

在最新Jetbrains产品中更改此设置的说明

编辑product64。Vmoptions没有为我工作，但编辑的想法。属性工作正常。 另外，为了能够处理大文件，您可能需要更改product64中的值。Vmoptions / product。vmoptions用于-Xms和 - xmx

Webstorm的Windows默认安装位置:

C：\Program Files\JetBrains\WebStorm 2019.1.3\bin\idea.properties

智能感知默认设置为x4，文件大小默认设置为x5

(我的商业工作站是一个野兽:第8代i7, 32Gb RAM, NVMe pcie3.0 0x4 SDD, gloat，等等，gloat，等等)

#---------------------------------------------------------------------
# Maximum file size (kilobytes) IDE should provide code assistance for.
# The larger file is the slower its editor works and higher overall system memory requirements are
# if code assistance is enabled. Remove this property or set to very large number if you need
# code assistance for any files available regardless their size.
#--------------------------------------------------------------------- 
idea.max.intellisense.filesize=10000

    #---------------------------------------------------------------------
    # Maximum file size (kilobytes) IDE is able to open.
    #--------------------------------------------------------------------- 

idea.max.content.load.filesize=100000

编辑IDEA的配置文件:IDEA_HOME/bin/ IDEA .properties

# Maximum file size (kilobytes) IDE should provide code assistance for.
idea.max.intellisense.filesize=60000

# Maximum file size (kilobytes) IDE is able to open.
idea.max.content.load.filesize=60000

保存并重新启动IDEA

为了澄清Alvaro的回答，您需要将-D选项添加到命令行列表中。我使用的是PyCharm，但概念是一样的:

pycharm{64,.exe,64.exe}.vmoptions:
<code>
    -server
    -Xms128m
    ...
    -Didea.max.intellisense.filesize=999999 # <--- new line
</code>

在IntelliJ 2016及更新版本中，您可以从帮助菜单中更改此设置，编辑自定义属性(由@eggplantbr评论)。

在较旧的版本中，没有GUI可以做到这一点。但是你可以修改它，如果你编辑IntelliJ IDEA平台属性文件:

#---------------------------------------------------------------------
# Maximum file size (kilobytes) IDE should provide code assistance for.
# The larger file is the slower its editor works and higher overall system memory requirements are
# if code assistance is enabled. Remove this property or set to very large number if you need
# code assistance for any files available regardless their size.
#---------------------------------------------------------------------
idea.max.intellisense.filesize=2500