Field-Notes

From the paper: How to Write to SSDs (External link). Identifying the source of write amplification Authors identify 2 main culprits for WA. 1. DBMSs themselves write more DBMS often issues more writes than expected. When comparing user writes with total amount of writes issued by the DBMS (user + other DB-issued writes), latter is roughly double the user writes due to the doublewrite buffering overhead.