Bulk update of prices - Most optimal way?

Hi everybody.

We have a solution with around 200.000 variants/SKUs each of them having around 40 price points (one per market - we have 40 markets).

Once a week we need to adjust all price points for all variants, and we are looking for the most optimal way of doing it. Do any of you have experience in how to bulk update ~8.000.000 million prices in one go?

We have tried to use PriceServiceExtensions.SetCatalogEntryPricesIfNotReadOnly(catalogKeys, priceValuesSubset) to bulk insert prices (e.g. 20.000 price values at a time), but we often end up with an unresponsive server.