Erik Krogen created HDFS-11615: ---------------------------------- Summary: FSNamesystemLock metrics can be inaccurate due millisecond precision Key: HDFS-11615 URL: https://issues.apache.org/jira/browse/HDFS-11615 Project: Hadoop HDFS Issue Type: Bug Components: hdfs Affects Versions: 2.7.4 Reporter: Erik Krogen Assignee: Erik Krogen
Currently the {{FSNamesystemLock}} metrics created in HDFS-10872 track the lock hold time using {{Timer.monotonicNow()}}, which has millisecond-level precision. However, many of these operations hold the lock for less than a millisecond, making these metrics inaccurate. We should instead use {{System.nanoTime()}} for higher accuracy. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org