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Julian Reschke closed OAK-6984. ------------------------------- > High read IO in compaction retry cycles > --------------------------------------- > > Key: OAK-6984 > URL: https://issues.apache.org/jira/browse/OAK-6984 > Project: Jackrabbit Oak > Issue Type: Bug > Components: segment-tar > Reporter: Michael Dürig > Assignee: Michael Dürig > Labels: performance > Fix For: 1.7.14, 1.8 > > Attachments: compactioncycles.m, cpu.png, cycle-times.png, > cycles.png, extract.sc, gcmetrics-15.png, gcmetrics-20.png, gcmetrics.m, > readwrite.m, readwrite.png > > > We have seen unusual high read IO in compaction retry cycles in our longevity > tests at Adobe. > !cpu.png|width=1000! > Above picture shows the CPU utilisation during an online compaction run, > which starts at 03:00. At about 03:22 CPU user time drops and CPU waiting for > IO time increases. This point in time coincides with the start of the first > retry cycle of compaction. -- This message was sent by Atlassian JIRA (v6.4.14#64029)