@Override
          public void run() {
            long sweepTime = lastSweepTime.get();
            long markTime = lastMarkTime.get();
            if (markTime >= sweepTime) {
              lastSweepTime.set(System.currentTimeMillis());
              evictProactively();
            }
          }
Invoking this signals that new buffers have been marked for proactive eviction. Cache policies implementing this
need this information to correctly time sweep runs.
llap-server/src/java/org/apache/hadoop/hive/llap/cache/ProactiveEvictingCachePolicy.java