presto-session-property-managers/src/main/java/io/prestosql/plugin/session/db/RefreshingDbSpecsProvider.java/RefreshingDbSpecsProvider/initialize
class RefreshingDbSpecsProvider:    @PostConstruct
    public void initialize()
    {
        if (!started.getAndSet(true)) {
            executor.scheduleWithFixedDelay(this::refresh, 0, refreshPeriodMillis, TimeUnit.MILLISECONDS);
        }
    }