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From Franc Carter <franc.car...@sirca.org.au>
Subject Re: keycache persisted to disk ?
Date Mon, 13 Feb 2012 09:28:59 GMT
On Mon, Feb 13, 2012 at 8:15 PM, Peter Schuller <peter.schuller@infidyne.com
> wrote:

> > 2 Node cluster, 7.9GB of ram (ec2 m1.large)
> > RF=2
> > 11GB per node
> > Quorum reads
> > 122 million keys
> > heap size is 1867M (default from the AMI I am running)
> > I'm reading about 900k keys
>
> Ok, so basically a very significant portion of the data fits in page
> cache, but not all.
>

yep


>
> > As I was just going through cfstats - I noticed something I don't
> understand
> >
> >                 Key cache capacity: 906897
> >                 Key cache size: 906897
> >
> > I set the key cache to 2million, it's somehow got to a rather odd number
>
> You're on 1.0 +?


yep 1.07


> Nowadays there is code to actively make caches
> smaller if Cassandra detects that you seem to be running low on heap.
> Watch cassandra.log for messages to that effect (don't remember the
> exact message right now).
>
>
I just grep'd the logs and couldn't see anything that looked like that


>  --
> / Peter Schuller (@scode, http://worldmodscode.wordpress.com)
>



-- 

*Franc Carter* | Systems architect | Sirca Ltd
 <marc.zianideferranti@sirca.org.au>

franc.carter@sirca.org.au | www.sirca.org.au

Tel: +61 2 9236 9118

Level 9, 80 Clarence St, Sydney NSW 2000

PO Box H58, Australia Square, Sydney NSW 1215

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