Increase memcache limit in commandline render: bpy.config.sequenceMemCacheLimit

Hi,

as described here I would like to up the memcache limit for commandline sequence rendering.

import sys
import bpy

def main():
	bpy.config.sequenceMemCacheLimit=4096

if __name__ == '__main__':
	main()
./bin/blender -b sample-static-text.blend -P render_settings.py -a

But this doesn’t work. Any hints or observations?
Thanks!