mssql-server crashing: Failed to allocate BUFs: FAIL_BUFFER_ALLOCATION 8
The error message is indicating internal memory pressure; could you please share the complete errorlog output when the OOM condition had occurred. We would like to validate memory consumption by each clerk.

How large is your database which is still in recovery; It looks like there some long outstanding i/o operations occurring. Are there any latencies at the storage layer?

-Pradeep