Can memory consumption be reduced or optimized?

Question

ImageMagick

convert -density 690  KP_History_1999.pdf KP_History_1999.png

Works on small files.
If more than 12 mb - after 30 minutes of work writes:

convert-im6.q16: DistributedPixelCache '127.0.0.1' @ error/distribute-cache.c/ConnectPixelCacheServer/244. convert-im6.q16: cache resources exhausted `/tmp/magick-11061MEzPYSEDxjud3' @ error/cache.c/OpenPixelCache/3945.

Changed the file /etc/ImageMagick-6/policy.xml
And it helps, but again for small files.
For large memory, the server simply does not have enough.
And how to be?
And if not 12 mb, but 20? This is how much, 8 gb for one request and an hour of work?

Answer 1

pip3 install pdf2image

PDF page 1 -> page_1.jpg
PDF page 2 -> page_2.jpg
PDF page 3 -> page_3.jpg
….
PDF page n -> page_n.jpg

Source