Does your AI block size match your BI block size?

It should, here's why.

In OpenEdge, the AI (After-Image) block size should equal the BI (Before-Image) block size (both should be 16kb)  because both mechanisms are used to record transaction changes, and having them the same size ensures optimal performance and minimizes unnecessary I/O operations when recovering from a system failure; essentially, aligning the block sizes allows for more efficient data writing and reading to the respective files, especially when dealing with high transaction volumes.
See this Progress article on how to change your after-image block size.
See this Progress article on how to change your before-image block size.