For various reasons, you may need to change the location of the temporary directory that ImageMagick uses. A common use case is that ephemeral disk can easily run out space due to large *.pam files like magick-14446qjlotf0hZnw8.pam.
The ImageMagick temporary folder on Acquia Cloud defaults to using /tmp, however, ImageMagick can be configured via environment variables. The variable that controls the path of the ImageMagick temporary directory is called MAGICK_TEMPORARY_PATH.
Select the appropriate documentation from the list below in order to set the MAGICK_TEMPORARY_PATH environment variable:
By following the above guide on creating custom environment variables, create one named MAGICK_TEMPORARY_PATH and set the value to /mnt/tmp/[docroot].[env]/.
Make sure to replace [docroot] and [env] with the appropriate values for the application and environment you wish to modify the location of the temporary folder for ImageMagick.