[GitHub] [iotdb] zhanglingzhe0820 commented on a change in pull request #2080: Add continuous compaction in level compaction strategy

[GitBox <gi...@apache.org>]

zhanglingzhe0820 commented on a change in pull request #2080:
URL: https://github.com/apache/iotdb/pull/2080#discussion_r554664431



##########
File path: server/src/main/java/org/apache/iotdb/db/engine/cache/FileStatistics.java
##########
@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.iotdb.db.engine.cache;
+
+import static org.apache.iotdb.tsfile.utils.RamUsageEstimator.NUM_BYTES_INT;
+import static org.apache.iotdb.tsfile.utils.RamUsageEstimator.NUM_BYTES_LONG;
+import static org.apache.iotdb.tsfile.utils.RamUsageEstimator.NUM_BYTES_OBJECT_REF;
+
+public class FileStatistics {
+
+  private long numOfPoints;
+  private int sensorNum;
+
+  public FileStatistics(long numOfPoints, int sensorNum) {
+    this.numOfPoints = numOfPoints;
+    this.sensorNum = sensorNum;
+  }
+
+  public long getNumOfPoints() {
+    return numOfPoints;
+  }
+
+  public void setNumOfPoints(long numOfPoints) {
+    this.numOfPoints = numOfPoints;
+  }
+
+  public int getSensorNum() {
+    return sensorNum;
+  }
+
+  public void setSensorNum(int sensorNum) {
+    this.sensorNum = sensorNum;
+  }
+
+
+  public long calculateRamSize() {
+    return NUM_BYTES_OBJECT_REF + NUM_BYTES_LONG + NUM_BYTES_INT;

Review comment:
       okay

##########
File path: server/src/main/java/org/apache/iotdb/db/conf/IoTDBConfig.java
##########
@@ -421,6 +427,11 @@
    */
   private long allocateMemoryForChunkCache = allocateMemoryForRead / 10;
 
+  /**
+   * Memory allocated for file statistics cache in compaction process
+   */
+  private long allocateMemoryForFileStatisticsCache = allocateMemoryForRead / 100;

Review comment:
       solved




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