public void setMMapNoCoreLimit(long noCoreLimit) {
        if (noCoreLimit >= 0) {
            environmentVariables.put("VESPA_MMAP_NOCORE_LIMIT", noCoreLimit);
        } else {
            environmentVariables.remove("VESPA_MMAP_NOCORE_LIMIT");
        }
    }
If larger or equal to 0 it mean that explicit mmaps shall not be included in coredump.
config-model/src/main/java/com/yahoo/vespa/model/AbstractService.java