Merge pull request #4624 from ClickHouse/aashishkohli-patch-16

Update 01_auto_scaling.md

Author: Blargian

docs/cloud/features/04_infrastructure/automatic_scaling/01_auto_scaling.md

@@ -56,7 +56,9 @@ Please note that as part of this change:
 
 Scale and Enterprise services support autoscaling based on CPU and memory usage. We constantly monitor the historical usage of a service over a lookback window (spanning the past 30 hours) to make scaling decisions. If the usage rises above or falls below certain thresholds, we scale the service appropriately to match the demand.
 
-CPU-based autoscaling kicks in when CPU usage crosses an upper threshold in the range of 50-75% (actual threshold depends on the size of the cluster). At this point, CPU allocation to the cluster is doubled. If CPU usage falls below half of the upper threshold (for instance, to 25% in case of a 50% upper threshold), CPU allocation is halved.
+For non-MBB services, CPU-based autoscaling kicks in when CPU usage crosses an upper threshold in the range of 50-75% (actual threshold depends on the size of the cluster). At this point, CPU allocation to the cluster is doubled. If CPU usage falls below half of the upper threshold (for instance, to 25% in case of a 50% upper threshold), CPU allocation is halved. 
+
+For services already utilizing the MBB scaling approach, scaling up happens at a CPU threshold of 75%, and scale down happens at half of that threshold, or 37.5%.
 
 Memory-based auto-scaling scales the cluster to 125% of the maximum memory usage, or up to 150% if OOM (out of memory) errors are encountered.