Unable to create a SolusVM OpenVZ container via API with "custommemory" variable: Custom burst memory invalid

Symptoms

Unable to create an SolusVM OpenVZ container over API with "custommemory" variable:

CONFIG_TEXT: Custom burst memory invalid

Cause

Burst memory was not set in API call.

Resolution

Set custom memory as bellow:

CONFIG_TEXT: postfields["custommemory"] = "256:500";

Where 256 - standard memory, 500 - burst memory.