Environment

• MongoDB 7.3.0-alpha1
• Single node replica set
• macOS

Happened to observe that a new 10MB FTDC file was being rolled every 8 minutes instead of the more typical 4-8 hours.

Based on some internal discussion this is thought to be caused by frequent schema changes brought on by a separate memory optimization.

This is apparently trivially reproducible on linux. Example logs from a linux repro:

"full-time diagnostic data capture schema change: field name change","attr":{"from":"block-manager","to":"cursor"}}
"full-time diagnostic data capture schema change: field name change","attr":{"from":"cursor","to":"block-cache"}}