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From Nikolay Kоvshov <nkovs...@yandex.ru>
Subject Re: Cassandra 1.0 hangs during GC
Date Mon, 30 Jul 2012 12:09:08 GMT
You mean using swap memory? I have total of 48G of RAM and Cassandra never used more than 2G,
swap is disabled.

But as I have little clues, I can give this a try. Is there any fresh instruction on running
Cassandra with JNA ?

30.07.2012, 16:01, "Mateusz Korniak" <mateusz-lists@ant.gliwice.pl>:
> On Monday 30 of July 2012, Nikolay Kоvshov wrote:
>
>>  -  JNA is not installed on both machines
>
> So your GC times may be strongly [1] affected by swapping.
> IIRC, also snapshotting is more expensive and may trigger more swapping.
> I would start with turning JNA mlockall on [2].
>
> [1]:
> Not sure if up to numbers you presented ( many seconds)...
>
> [2]:
> INFO [main] 2012-07-27 12:18:27,135 CLibrary.java (line 109) JNA mlockall
> successful
>
> --
> Mateusz Korniak

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