Had the same issue. See if any of the following helps.

import sage.libs.ecl
sage.libs.ecl.ecl_eval("(ext:set-limit 'ext:heap-size 0)")

From the discussion here: https://groups.google.com/g/sage-support/c/nieHqAWPHpQ?pli=1

A more in depth discussion is available here.

https://github.com/sagemath/sage/issues/6772

And the memory limits that you can change can be found here on the manual.

https://ecl.common-lisp.dev/static/files/manual/current-manual/Memory-Management.html#tab_003amem_002dlimits

Feel free to correct any mistakes, as I am also in the process of learning Sage.