The default HealthChecks provided at IDMS installation should use very little CPU.
This article describes how to check how much is used.
Release : All supported releases
Component : IDMS
Use the following z/OS command in SYSVIEW:
f hcheck,display,check(CA_IDMS,*),detail,diag
At the end of the output, the following fields can be found:
668 00000094 INTERNAL DIAGNOSTICS - CHECK TOKEN: 00000050_FC93C000
668 00000094 ASID: 0073 FUNC: N/A
668 00000094 LAST CPU TIME: 0.000 MAX CPU TIME: 0.000
These two fields represent the amount of CPU time the check used the last time it was run, and the maximum amount of CPU time the check has ever used for any one execution.
If using SDSF, use the CK command.