Problems rebuilding search index on a large site

[XFFA.IR Bot]

I just completed a migration from an old Knownhost server to a new Knowhost server. The elasticsearch was setup on the new server. But, when I try to rebuild the search index via cli or the Xenforo backend, it ends up crashing. It could be a RAM issue perhaps.

I've been using: /usr/local/php83/bin/php cmd.php xf-rebuild:search

Is there any way to do this without running out of RAM? Or is it some other issue?

I have 1.7M posts.