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https://issues.apache.org/jira/browse/KAFKA-5734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16127078#comment-16127078
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Manikumar commented on KAFKA-5734:
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We can use JMAP command to output a histogram of java object heap. This will
help us to analyze the heap memory usage.
Take periodic outputs and compare the outputs.
{quote}jdk/bin/jmap -histo:live PID{quote}
> Heap (Old generation space) gradually increase
> ----------------------------------------------
>
> Key: KAFKA-5734
> URL: https://issues.apache.org/jira/browse/KAFKA-5734
> Project: Kafka
> Issue Type: Bug
> Components: metrics
> Affects Versions: 0.10.2.0
> Environment: ubuntu 14.04 / java 1.7.0
> Reporter: jang
> Attachments: heap-log.xlsx
>
>
> I set up kafka server on ubuntu with 4GB ram.
> Heap ( Old generation space ) size is increasing gradually like attached
> excel file which recorded gc info in 1 minute interval.
> Finally OU occupies 2.6GB and GC expend too much time ( And out of memory
> exception )
> kafka process argumens are below.
> _java -Xmx3000M -Xms2G -server -XX:+UseG1GC -XX:MaxGCPauseMillis=20
> -XX:InitiatingHeapOccupancyPercent=35 -XX:+DisableExplicitGC
> -Djava.awt.headless=true
> -Xloggc:/usr/local/kafka/bin/../logs/kafkaServer-gc.log -verbose:gc
> -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintGCTimeStamps
> -Dcom.sun.management.jmxremote
> -Dcom.sun.management.jmxremote.authenticate=false
> -Dcom.sun.management.jmxremote.ssl=false
> -Dkafka.logs.dir=/usr/local/kafka/bin/../logs
> -Dlog4j.configuration=file:/usr/local/kafka/bin/../config/log4j.properties_
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