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From Bhuvan Rawal <bhu1ra...@gmail.com>
Subject Re: Slow nodetool response time
Date Wed, 22 Jun 2016 19:50:00 GMT
Thanks for your reply Sebastian. We have a 3 node dev cluster setup on
local servers. I tried nodetool commands on all 3 of them and response time
was same (excess of 17 Seconds) and most in blocked state as you found out.
I tried fiddling out with /etc/hosts file and on adding the line:

<private-ip> <hostname>

This change Made the wait nearly minmal and has possibly resolved the
problem. I can share the response on the same machine for which I had
earlier shared (it was greater than 17 secs earlier)
$ time nodetool version
ReleaseVersion: 3.0.3

real 0m*1.197s*
user 0m1.963s
sys 0m0.284s

This is a bit puzzling as I checked and ping is working in sub millisecond
from host to self and other two servers, wondering where that time was
being spent earlier.

Thanks & Regards,
Bhuvan

On Wed, Jun 22, 2016 at 7:10 PM, Sebastian Estevez <
sebastian.estevez@datastax.com> wrote:

> Sounds like your process is spending a lot of time in blocked state (real
> - user - sys). Check your os subsystems, maybe your machine is bogged down
> by other work.
>
> FWIW, my time in an idle system is about 2 seconds but can go up to ~13
> seconds on a busy system with 70% cpu utilized. No difference between 1 and
> 3 node setups.
>
> All the best,
>
>
> [image: datastax_logo.png] <http://www.datastax.com/>
>
> Sebastián Estévez
>
> Solutions Architect | 954 905 8615 | sebastian.estevez@datastax.com
>
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> On Wed, Jun 22, 2016 at 9:03 AM, Bhuvan Rawal <bhu1rawal@gmail.com> wrote:
>
>> Hi,
>>
>> We have been facing slowness in getting response from nodetool for any of
>> its subcommand. On the same version on AWS it responds really fast but on
>> local 1 node machine or local DC cluster it performs very slow.
>>
>> On Local DC :
>> *$ time nodetool version*
>> ReleaseVersion: 3.0.3
>>
>> real 0m*17.582s*
>> user 0m2.334s
>> sys 0m0.470s
>>
>> On AWS:
>> *$ time nodetool version*
>> ReleaseVersion: 3.0.3
>>
>> real 0m*1.084s*
>> user 0m1.772s
>> sys 0m0.363s
>>
>> Any way by which its speed can be increased?
>>
>> Thanks & Regards,
>> Bhuvan
>>
>
>

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