The maximum recommended total number of sales rules (cart price rules) for websites is 1000 in Magento. Having many sales rules can have a negative impact on performance. The limitation is due to needing to validate cart contents against all rules registered in the system to apply the necessary rules.
Affected products and versions
Having too many sales rules will cause degraded performance on the site, including:
- Adding products to cart response time increases above performance targets.
- Mini-cart loading and rendering time increases.
- Cart page rendering time increases above performance targets.
- On the Checkout page there is a section called Totals (Final price, Subtotal) and number of sales rules have a direct performance impact on this block rendering time.
It is best practice to:
- Manage and remove non-used rules.
- Add strict rule conditions (like attribute or category filter) for increasing efficiency of the matching mechanism. For steps on creating and removing cart price rules, refer to DevDocs' Magento User guide > Cart Price Rules.
DevDocs' Magento User Guide > Cart Price Rules.