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From Andre Sprenger <>
Subject Re: Recurring actions with 4 hour interval
Date Tue, 10 Dec 2013 15:31:19 GMT
As far as I know there is nothing hard coded in Cassandra that kicks in
every 4 hours. Turn on GC logging, maybe dump the output of jstats to a
file and correlate this data with the Cassandra logs. Cassandra logs are
pretty good in telling you what is going on.

2013/12/10 Joel Samuelsson <>

> Hello,
> We've been having a lot of problems with extremely long GC (and still do)
> which I've asked about several times on this list (I can find links to
> those discussions if anyone is interested).
> We noticed a pattern that the GC pauses may be related to something
> happening every 4 hours. Is there anything specific happening within
> Cassandra with a 4 hour interval?
> Any help is much appreciated,
> Joel Samuelsson

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