Mediawiki uses ImageMagick Utility for resized thumbnail image. You can use it as
$wgUseImageMagick = true; $wgImageMagickConvertCommand = "/usr/bin/convert";
in your LocalSettings.php.
There are two reasons why ImageMagick is beneficial.
- It reduces loading time for image file as it stores thumbnail image separately.
- It gives higher quality than GD library.
However, you may encounter following error when shell memory is not allocated big enough.
Error creating thumbnail: libgomp: Thread creation failed: Cannot allocate memory
It is due to small shell memory allocation which is handled by Mediawiki. In this case, you can simply add following in LocalSettings.php
$wgMaxShellMemory = 524288;
524288 means 512K. You can specify it as you desire. 1
