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Posted to user@cassandra.apache.org by Eunsu Kim <eu...@gmail.com> on 2018/03/12 02:30:16 UTC
Self read throughput increased rapidly
We monitored the write/read throughput through the Cassandra cluster via JMX. There was little read throughput before March 6. From March 6, the write throughput increased, but the read throughput suddenly increased sharply. Do anyone know why this happens?
Re: Self read throughput increased rapidly
Posted by Eunsu Kim <eu...@gmail.com>.
We should find out more about the ongoing user.
Thank you for your reponse
> On 12 Mar 2018, at 11:43 AM, Jeff Jirsa <jj...@gmail.com> wrote:
>
> Well it’s hard to say unless you’re more precise with what JMX emitted metric you’re graphing, but yes, there are read metrics that will increase if people read the data
>
>
> --
> Jeff Jirsa
>
>
> On Mar 11, 2018, at 7:38 PM, Eunsu Kim <eunsu.bill23@gmail.com <ma...@gmail.com>> wrote:
>
>> No I didn’t
>>
>> Do you mean that this read throughput value comes out because somebody actually reads the data?
>>
>>
>>> On 12 Mar 2018, at 11:32 AM, Jeff Jirsa <jjirsa@gmail.com <ma...@gmail.com>> wrote:
>>>
>>> I presume you’re asking because you don’t think you’re doing reads. Did you start doing counter writes?
>>>
>>>
>>> --
>>> Jeff Jirsa
>>>
>>>
>>> On Mar 11, 2018, at 7:30 PM, Eunsu Kim <eunsu.bill23@gmail.com <ma...@gmail.com>> wrote:
>>>
>>>> We monitored the write/read throughput through the Cassandra cluster via JMX. There was little read throughput before March 6. From March 6, the write throughput increased, but the read throughput suddenly increased sharply. Do anyone know why this happens?
>>>>
>>>> <Screen Shot 2018-03-12 at 10.27.07 AM.png>
>>
Re: Self read throughput increased rapidly
Posted by Jeff Jirsa <jj...@gmail.com>.
Well it’s hard to say unless you’re more precise with what JMX emitted metric you’re graphing, but yes, there are read metrics that will increase if people read the data
--
Jeff Jirsa
> On Mar 11, 2018, at 7:38 PM, Eunsu Kim <eu...@gmail.com> wrote:
>
> No I didn’t
>
> Do you mean that this read throughput value comes out because somebody actually reads the data?
>
>
>> On 12 Mar 2018, at 11:32 AM, Jeff Jirsa <jj...@gmail.com> wrote:
>>
>> I presume you’re asking because you don’t think you’re doing reads. Did you start doing counter writes?
>>
>>
>> --
>> Jeff Jirsa
>>
>>
>>> On Mar 11, 2018, at 7:30 PM, Eunsu Kim <eu...@gmail.com> wrote:
>>>
>>> We monitored the write/read throughput through the Cassandra cluster via JMX. There was little read throughput before March 6. From March 6, the write throughput increased, but the read throughput suddenly increased sharply. Do anyone know why this happens?
>>>
>>> <Screen Shot 2018-03-12 at 10.27.07 AM.png>
>
Re: Self read throughput increased rapidly
Posted by Eunsu Kim <eu...@gmail.com>.
No I didn’t
Do you mean that this read throughput value comes out because somebody actually reads the data?
> On 12 Mar 2018, at 11:32 AM, Jeff Jirsa <jj...@gmail.com> wrote:
>
> I presume you’re asking because you don’t think you’re doing reads. Did you start doing counter writes?
>
>
> --
> Jeff Jirsa
>
>
> On Mar 11, 2018, at 7:30 PM, Eunsu Kim <eunsu.bill23@gmail.com <ma...@gmail.com>> wrote:
>
>> We monitored the write/read throughput through the Cassandra cluster via JMX. There was little read throughput before March 6. From March 6, the write throughput increased, but the read throughput suddenly increased sharply. Do anyone know why this happens?
>>
>> <Screen Shot 2018-03-12 at 10.27.07 AM.png>
Re: Self read throughput increased rapidly
Posted by Jeff Jirsa <jj...@gmail.com>.
I presume you’re asking because you don’t think you’re doing reads. Did you start doing counter writes?
--
Jeff Jirsa
> On Mar 11, 2018, at 7:30 PM, Eunsu Kim <eu...@gmail.com> wrote:
>
> We monitored the write/read throughput through the Cassandra cluster via JMX. There was little read throughput before March 6. From March 6, the write throughput increased, but the read throughput suddenly increased sharply. Do anyone know why this happens?
>
> <Screen Shot 2018-03-12 at 10.27.07 AM.png>