[GitHub] [iotdb] xingtanzjr commented on a diff in pull request #6911: [IOTDB-3980][Metric] Use asynchronous way to collect some predefined metrics.

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

xingtanzjr commented on code in PR #6911:
URL: https://github.com/apache/iotdb/pull/6911#discussion_r941941356


##########
server/src/main/java/org/apache/iotdb/db/service/metrics/predefined/FileMetrics.java:
##########
@@ -146,4 +98,112 @@ public void bindTo(MetricManager metricManager) {
   public PredefinedMetric getType() {
     return PredefinedMetric.FILE;
   }
+
+  @Override
+  public void startAsyncCollectedMetrics() {
+    ScheduledExecutorUtil.safelyScheduleAtFixedRate(
+        service,
+        this::collect,
+        1,
+        MetricConfigDescriptor.getInstance().getMetricConfig().getAsyncCollectPeriodInSecond(),
+        TimeUnit.SECONDS);
+  }
+
+  @Override
+  public void stopAsyncCollectedMetrics() {
+    service.shutdown();
+  }
+
+  private void collect() {
+    walFileTotalSize = Stream.of(walDirs).mapToLong(FileUtils::getDirSize).sum();
+    sequenceFileTotalSize =
+        Stream.of(dataDirs)
+            .mapToLong(
+                dir -> {
+                  dir += File.separator + IoTDBConstant.SEQUENCE_FLODER_NAME;
+                  return FileUtils.getDirSize(dir);
+                })
+            .sum();
+    unsequenceFileTotalSize =
+        Stream.of(dataDirs)
+            .mapToLong(
+                dir -> {
+                  dir += File.separator + IoTDBConstant.UNSEQUENCE_FLODER_NAME;
+                  return FileUtils.getDirSize(dir);
+                })
+            .sum();
+    walFileTotalCount =

Review Comment:
   Let's use the new interface from WALNode to reduce calculation



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