[ https://issues.apache.org/jira/browse/HDFS-11615?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Erik Krogen updated HDFS-11615: ------------------------------- Summary: FSNamesystemLock metrics can be inaccurate due to millisecond precision (was: FSNamesystemLock metrics can be inaccurate due millisecond precision) > FSNamesystemLock metrics can be inaccurate due to 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-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org