Manual:$wgMaxShellFileSize

Shell and process control: $wgMaxShellFileSize
Maximum file size created by shell processes under linux, in KiB.
Introduced in version:1.8.0 (r16665)
Removed in version:Still in use
Allowed values:(integer)
Default value:102400

Details

Maximum file size created by shell processes under linux, in KiB.

ImageMagick convert for example can be fairly hungry for scratch space.

See also