private RefStreamDefinition buildUniqueRefStreamDefinition(final long streamId) {
        return new RefStreamDefinition(
                UUID.randomUUID().toString(),
                UUID.randomUUID().toString(),
                streamId);
    }
Make entryCount very big for manual performance testing or profiling
stroom-pipeline/src/test/java/stroom/pipeline/refdata/store/onheapstore/TestRefDataOnHeapStore.java