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Posted to solr-user@lucene.apache.org by Lucky Sharma <go...@gmail.com> on 2019/07/10 21:17:56 UTC
QTime
Hi all,
I am seeing one very weird behaviour of QTime of SOLR.
Scenario is :
When I am hitting the Solr Cloud Instance, situated at a DC with my local
machine while load test I was seeing 400ms Qtime response and 1sec Http
Response time.
While I am trying to do the same process within the same DC location, I am
getting 100 ms Solr QTime and 130ms Response Time.
Does QTime counts network latency too??
According to one thread: I have found
*"QTime is the time spent in generating the in-memory representation forthe
response before the response writer starts streaming"*
http://mail-archives.apache.org/mod_mbox/lucene-solr-user/200911.mbox/%3C2613171a0911021121u10aae54bud436b452e393444d@mail.gmail.com%3E
Regards,
Lucky Sharma
--
Warm Regards,
Lucky Sharma
Contact No :+91 9821559918
Re: QTime
Posted by Edward Ribeiro <ed...@gmail.com>.
Yeah, for network latency I would recommend a tool like charlesproxy.
Edward
Em qui, 11 de jul de 2019 20:59, Erick Erickson <er...@gmail.com>
escreveu:
> true, although there’s still network that can’t be included.
>
> > On Jul 11, 2019, at 5:55 PM, Edward Ribeiro <ed...@gmail.com>
> wrote:
> >
> > Wouldn't be the case of using &rows=0 parameter on those requests? Wdyt?
> >
> > Edward
> >
> > Em qui, 11 de jul de 2019 14:24, Erick Erickson <erickerickson@gmail.com
> >
> > escreveu:
> >
> >> Not only does Qtime not include network latency, it also doesn't include
> >> the time it takes to assemble the docs for return, which can be lengthy
> >> when rows is large..
> >>
> >> On Wed, Jul 10, 2019, 14:39 Shawn Heisey <ap...@elyograg.org> wrote:
> >>
> >>> On 7/10/2019 3:17 PM, Lucky Sharma wrote:
> >>>> I am seeing one very weird behaviour of QTime of SOLR.
> >>>>
> >>>> Scenario is :
> >>>> When I am hitting the Solr Cloud Instance, situated at a DC with my
> >> local
> >>>> machine while load test I was seeing 400ms Qtime response and 1sec
> Http
> >>>> Response time.
> >>>
> >>> How much data was in the response? If it's large, I can see it taking
> >>> that long to transfer. This is even more likely if there is a lot of
> >>> network latency in the network between the client and the server.
> >>>
> >>>> While I am trying to do the same process within the same DC location,
> I
> >>> am
> >>>> getting 100 ms Solr QTime and 130ms Response Time.
> >>>>
> >>>> Does QTime counts network latency too??
> >>>
> >>> There's no way Solr can include the time to send the response over the
> >>> network in QTime. The value is calculated and put into the response
> >>> before Solr starts sending.
> >>>
> >>> Thanks,
> >>> Shawn
> >>>
> >>
>
>
Re: QTime
Posted by Erick Erickson <er...@gmail.com>.
true, although there’s still network that can’t be included.
> On Jul 11, 2019, at 5:55 PM, Edward Ribeiro <ed...@gmail.com> wrote:
>
> Wouldn't be the case of using &rows=0 parameter on those requests? Wdyt?
>
> Edward
>
> Em qui, 11 de jul de 2019 14:24, Erick Erickson <er...@gmail.com>
> escreveu:
>
>> Not only does Qtime not include network latency, it also doesn't include
>> the time it takes to assemble the docs for return, which can be lengthy
>> when rows is large..
>>
>> On Wed, Jul 10, 2019, 14:39 Shawn Heisey <ap...@elyograg.org> wrote:
>>
>>> On 7/10/2019 3:17 PM, Lucky Sharma wrote:
>>>> I am seeing one very weird behaviour of QTime of SOLR.
>>>>
>>>> Scenario is :
>>>> When I am hitting the Solr Cloud Instance, situated at a DC with my
>> local
>>>> machine while load test I was seeing 400ms Qtime response and 1sec Http
>>>> Response time.
>>>
>>> How much data was in the response? If it's large, I can see it taking
>>> that long to transfer. This is even more likely if there is a lot of
>>> network latency in the network between the client and the server.
>>>
>>>> While I am trying to do the same process within the same DC location, I
>>> am
>>>> getting 100 ms Solr QTime and 130ms Response Time.
>>>>
>>>> Does QTime counts network latency too??
>>>
>>> There's no way Solr can include the time to send the response over the
>>> network in QTime. The value is calculated and put into the response
>>> before Solr starts sending.
>>>
>>> Thanks,
>>> Shawn
>>>
>>
Re: QTime
Posted by Edward Ribeiro <ed...@gmail.com>.
Wouldn't be the case of using &rows=0 parameter on those requests? Wdyt?
Edward
Em qui, 11 de jul de 2019 14:24, Erick Erickson <er...@gmail.com>
escreveu:
> Not only does Qtime not include network latency, it also doesn't include
> the time it takes to assemble the docs for return, which can be lengthy
> when rows is large..
>
> On Wed, Jul 10, 2019, 14:39 Shawn Heisey <ap...@elyograg.org> wrote:
>
> > On 7/10/2019 3:17 PM, Lucky Sharma wrote:
> > > I am seeing one very weird behaviour of QTime of SOLR.
> > >
> > > Scenario is :
> > > When I am hitting the Solr Cloud Instance, situated at a DC with my
> local
> > > machine while load test I was seeing 400ms Qtime response and 1sec Http
> > > Response time.
> >
> > How much data was in the response? If it's large, I can see it taking
> > that long to transfer. This is even more likely if there is a lot of
> > network latency in the network between the client and the server.
> >
> > > While I am trying to do the same process within the same DC location, I
> > am
> > > getting 100 ms Solr QTime and 130ms Response Time.
> > >
> > > Does QTime counts network latency too??
> >
> > There's no way Solr can include the time to send the response over the
> > network in QTime. The value is calculated and put into the response
> > before Solr starts sending.
> >
> > Thanks,
> > Shawn
> >
>
Re: QTime
Posted by Erick Erickson <er...@gmail.com>.
Not only does Qtime not include network latency, it also doesn't include
the time it takes to assemble the docs for return, which can be lengthy
when rows is large..
On Wed, Jul 10, 2019, 14:39 Shawn Heisey <ap...@elyograg.org> wrote:
> On 7/10/2019 3:17 PM, Lucky Sharma wrote:
> > I am seeing one very weird behaviour of QTime of SOLR.
> >
> > Scenario is :
> > When I am hitting the Solr Cloud Instance, situated at a DC with my local
> > machine while load test I was seeing 400ms Qtime response and 1sec Http
> > Response time.
>
> How much data was in the response? If it's large, I can see it taking
> that long to transfer. This is even more likely if there is a lot of
> network latency in the network between the client and the server.
>
> > While I am trying to do the same process within the same DC location, I
> am
> > getting 100 ms Solr QTime and 130ms Response Time.
> >
> > Does QTime counts network latency too??
>
> There's no way Solr can include the time to send the response over the
> network in QTime. The value is calculated and put into the response
> before Solr starts sending.
>
> Thanks,
> Shawn
>
Re: QTime
Posted by Shawn Heisey <ap...@elyograg.org>.
On 7/10/2019 3:17 PM, Lucky Sharma wrote:
> I am seeing one very weird behaviour of QTime of SOLR.
>
> Scenario is :
> When I am hitting the Solr Cloud Instance, situated at a DC with my local
> machine while load test I was seeing 400ms Qtime response and 1sec Http
> Response time.
How much data was in the response? If it's large, I can see it taking
that long to transfer. This is even more likely if there is a lot of
network latency in the network between the client and the server.
> While I am trying to do the same process within the same DC location, I am
> getting 100 ms Solr QTime and 130ms Response Time.
>
> Does QTime counts network latency too??
There's no way Solr can include the time to send the response over the
network in QTime. The value is calculated and put into the response
before Solr starts sending.
Thanks,
Shawn