public void removeAllTableColStats() {
      try {
        tableLock.writeLock().lock();
        tableColStatsCache.clear();
        updateMemberSize(MemberName.TABLE_COL_STATS_CACHE, 0, SizeMode.Snapshot);
        setMemberCacheUpdated(MemberName.TABLE_COL_STATS_CACHE, true);
      } finally {
        tableLock.writeLock().unlock();
      }
    }
Common method to refresh cache constraint
@param constraints list of constraints to update
@param mn Constraint type
@return Since memory constraint is handled by cache eviction policy.
Hence this method will always return true if correct constraint type passed.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/cache/SharedCache.java