NoHAAutoscaleExtra
Extra instance capacity for autoscaling in non-HA Rack clusters. This only applies when HighAvailability is set to false. This functions similarly to the AutoscaleExtra parameter but is used exclusively in non-HA configurations.
| Default value | 0 |
Use Cases
- Adding a buffer of one or more spare instances in non-HA Racks to absorb traffic spikes without waiting for new instances to launch
- Setting to
1to ensure at least one instance is always available beyond the minimum needed for running workloads - Keeping at
0in development or staging environments where cost is a priority over burst headroom
Additional Information
When HighAvailability is true, the AutoscaleExtra parameter is used instead. NoHAAutoscaleExtra is ignored in HA configurations.
The autoscaler uses this value to determine how many additional instances to keep running beyond what is required to schedule current workloads. A value of 0 means autoscale will only provision exactly the capacity needed.
$ convox rack params set NoHAAutoscaleExtra=1
See Also
