Hi,

On Odoo.sh, manual database partitioning for tables like account_move_line and account_move is not supported, since it could break Odoo’s core accounting logic. Instead, performance with millions of records should be managed through indexing, archiving, and database cleanup. For larger-scale needs, you can contact Odoo Support, as advanced optimizations and scaling options are only available through Odoo’s Enterprise support or dedicated hosting.

Hope it helps