Am 2026-02-17 20:24, schrieb Robert Lukan via ceph-users: Hi Robert, Are there known risks to "stepping down" PGs in increments of, say, 10-20% at a time while the cluster is under load? 2. Reducing the number is best done via halveing not some aribtrary percentage in order to keep the number a power of 2. Given the 16k PG count, is there a specific "recovery/backfill" throttle we should prioritize to ensure VM performance isn't impacted during the merge process? The performance impact of reducing the number of PGs should be fine. Regards -- --martin konold ppa. Martin Konold -- Martin Konold - Prokurist, CTO KONSEC GmbH - make things real Amtsgericht Stuttgart, HRB 23690 Geschäftsführer: Andreas Mack Im Köller 3, 70794 Filderstadt, Germany