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From Nick Bailey <n...@datastax.com>
Subject Re: Running Cassandra 1.1, how can I see the efficiency of the key cache?
Date Sat, 22 Dec 2012 17:40:10 GMT
The key cache and row cache graphs in OpsCenter broke when the caches moved
from per column family to global. The next release of OpsCenter should fix
that.

-Nick


On Sat, Dec 22, 2012 at 10:42 AM, Andrew Bialecki <andrew.bialecki@gmail.com
> wrote:

> Thanks, I'll take a look at that too.
>
> I also found that "nodetool info" gives some information as well. For
> instance, here's what one node reads:
>
> Key Cache: size 104857584 (bytes), capacity 104857584 (bytes), 15085408
> hits, 17336031 requests, 0.870 recent hit rate, 14400 save period in
> seconds.
>
>
> I'm guessing most people knew this, but I checked the 1.1 docs (
> http://www.datastax.com/docs/1.1/references/nodetool#nodetool-info) and
> they don't mention that the "info" command shows key and row cache stats.
> Might be worth updating for others looking for this.
>
>
> On Sat, Dec 22, 2012 at 3:47 AM, Wz1975 <wz1975@yahoo.com> wrote:
>
>> Jmx has cache hit rate.
>>
>>
>> Thanks.
>> -Wei
>>
>> Sent from my Samsung smartphone on AT&T
>>
>>
>

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