:Why is the cache hit ratio of a CDN node decreased?

The factors that affect the Alibaba Cloud CDN cache hit rate decrease are as follows:

• Refresh the cache: The hit rate may decrease in a short period of time.
• Bandwidth surge: This will cause a large number of back-to-origin Alibaba Cloud Content Delivery Network nodes, and the hit rate will show a downward trend.
• Alibaba Cloud Content Delivery Network nodes access new content: As a result, Alibaba Cloud Content Delivery Network nodes have a large number of back-to-origin nodes, and the hit rate will show a downward trend.
• Cache rule adjustment: The hit rate may be affected.

Applicable scope

• CDN