DRS is set to Fully-Automated mode and seems to be migrating virtual machines too frequently. Which action can potentially decrease the amount of automated migrations performed by DRS?

Moving the slider to the right increases the threshold to a more aggressive level, causing DRS to apply lower-priority recommendations and trigger more automated migrations, which is the opposite of the desired outcome.

The Migration Threshold slider in vSphere DRS ranges from level 1 (Conservative) to level 5 (Aggressive). Decreasing the threshold by moving the slider to the left restricts DRS to only executing priority-1 recommendations - the most critical load imbalances - resulting in significantly fewer automated migrations while the cluster remains in Fully-Automated mode.

Switching to Partially-Automated mode changes the operational behavior so migrations require manual approval, but this alters the fundamental mode of operation rather than tuning migration sensitivity within Fully-Automated mode.

Enabling Enhanced vMotion Compatibility (EVC) standardizes CPU feature sets across hosts to allow cross-host migrations, but it has no effect on the DRS migration threshold or how frequently DRS initiates automated moves.