Hi Sachith, If a heap-dump was created during OOM, you can dissect it using Eclipse MAT of JProfiler and see what causing.
Regards, Hemika Hemika Kodikara Software Engineer WSO2 Inc. lean . enterprise . middleware http://wso2.com Mobile : +94777688882 On Tue, Sep 1, 2015 at 3:07 PM, Sachith Withana <[email protected]> wrote: > It actually happens even after running the query immediately after > inserting the data. > > It's just that I need to have a way to get the data by chunks rather than > the whole thing at once which causes the Out of memory issue. > > On Tue, Sep 1, 2015 at 9:31 AM, Hemika Kodikara <[email protected]> wrote: > >> Hi Sachith, >> >> Could you try running the same query in a 2.x version and see what error >> is occurring ? As far as I know, it could be a tombstone issue, 1.x >> versions doesnt show it. If it gives an error of tombstone overwhelming in >> 2.x, then its the case what Madhawa has explained. >> >> You manually can get rid of tombstones using nodetool by running flush >> command and then compaction. >> >> Regards, >> Hemika >> >> Hemika Kodikara >> Software Engineer >> WSO2 Inc. >> lean . enterprise . middleware >> http://wso2.com >> >> Mobile : +94777688882 >> >> On Tue, Sep 1, 2015 at 9:26 AM, Madhawa Gunasekara <[email protected]> >> wrote: >> >>> Hi Sachith, >>> >>> I'm not sure about this is the correct answer, but you can configure >>> gc_grace_seconds. It will help you to skip the OOM exception. >>> [1] http://docs.datastax.com/en/cql/3.0/cql/cql_reference/tabProp.html >>> >>> Thanks, >>> Madhawa >>> >>> On Mon, Aug 31, 2015 at 8:36 AM, Sachith Withana <[email protected]> >>> wrote: >>> >>>> Hi all, >>>> >>>> I need to read a whole column family from a previous version of >>>> Cassandra (1.x). It works for a small result set ( for a CQL select * >>>> query). But for a larger dataset ( around 1 million records) it throws an >>>> out of memory exception (GC). >>>> >>>> Are there any mechanisms like paging for Cassandra 1.x? Or any other >>>> workaround for this issue? >>>> >>>> I observed that paging is supported from Cassandra 2.0 and above but >>>> not in the previous versions. >>>> >>>> >>>> Thanks. >>>> -- >>>> Sachith Withana >>>> Software Engineer; WSO2 Inc.; http://wso2.com >>>> E-mail: sachith AT wso2.com >>>> M: +94715518127 >>>> Linked-In: <http://goog_416592669> >>>> https://lk.linkedin.com/in/sachithwithana >>>> >>>> _______________________________________________ >>>> Dev mailing list >>>> [email protected] >>>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>>> >>>> >>> >>> >>> -- >>> *Madhawa Gunasekara* >>> Software Engineer >>> WSO2 Inc.; http://wso2.com >>> lean.enterprise.middleware >>> >>> mobile: +94 719411002 <+94+719411002> >>> blog: *http://madhawa-gunasekara.blogspot.com >>> <http://madhawa-gunasekara.blogspot.com>* >>> linkedin: *http://lk.linkedin.com/in/mgunasekara >>> <http://lk.linkedin.com/in/mgunasekara>* >>> >>> _______________________________________________ >>> Dev mailing list >>> [email protected] >>> http://wso2.org/cgi-bin/mailman/listinfo/dev >>> >>> >> > > > -- > Sachith Withana > Software Engineer; WSO2 Inc.; http://wso2.com > E-mail: sachith AT wso2.com > M: +94715518127 > Linked-In: <http://goog_416592669> > https://lk.linkedin.com/in/sachithwithana >
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