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Posted to solr-user@lucene.apache.org by Sujatha Arun <su...@gmail.com> on 2012/01/23 05:16:06 UTC
Solr Cores
Hello,
We have in production a number of individual solr Instnaces on a single
JVM.As a result ,we see that the permgenSpace keeps increasing with each
additional instance added.
I would Like to know ,if we can have solr cores , instead of individual
instances.
- Is there any limit to the number of cores ,for a single instance?
- Will this decrease the permgen space as the LIB is shared.?
- Would there be any decrease in performance with number of cores added?
- Any thing else that I should know before moving into cores?
Any help would be appreciated?
Regards
Sujatha
Re: Solr Cores
Posted by Erick Erickson <er...@gmail.com>.
Your question can't be answered as asked, there are just too many
variables. Your best bet is to test and see.
Best
Erick
On Sun, Jan 29, 2012 at 6:37 AM, Ranveer Kumar <ra...@gmail.com> wrote:
> How much query per second a single core can handle in this case..
>
> regards
>
> On Wed, Jan 25, 2012 at 9:49 AM, Sujatha Arun <su...@gmail.com> wrote:
>
>> Thanks Erick.
>>
>> Regards
>> Sujatha
>>
>> On Mon, Jan 23, 2012 at 11:16 PM, Erick Erickson <erickerickson@gmail.com
>> >wrote:
>>
>> > You can have a large number of cores, so people have multiple
>> > hundreds. Having multiple cores is preferred over having
>> > multiple JVMs since it's more efficient at sharing system
>> > resources. If you're running a 32 bit JVM, you are limited in
>> > the amount of memory you can let the JVM use, so that's a
>> > consideration, but otherwise use multiple cores in one JVM
>> > and give that JVM say, half of the physical memory on the
>> > machine and tune from there.
>> >
>> > Best
>> > Erick
>> >
>> > On Sun, Jan 22, 2012 at 8:16 PM, Sujatha Arun <su...@gmail.com>
>> wrote:
>> > > Hello,
>> > >
>> > > We have in production a number of individual solr Instnaces on a single
>> > > JVM.As a result ,we see that the permgenSpace keeps increasing with
>> each
>> > > additional instance added.
>> > >
>> > > I would Like to know ,if we can have solr cores , instead of individual
>> > > instances.
>> > >
>> > >
>> > > - Is there any limit to the number of cores ,for a single instance?
>> > > - Will this decrease the permgen space as the LIB is shared.?
>> > > - Would there be any decrease in performance with number of cores
>> > added?
>> > > - Any thing else that I should know before moving into cores?
>> > >
>> > >
>> > > Any help would be appreciated?
>> > >
>> > > Regards
>> > > Sujatha
>> >
>>
Re: Solr Cores
Posted by Ranveer Kumar <ra...@gmail.com>.
How much query per second a single core can handle in this case..
regards
On Wed, Jan 25, 2012 at 9:49 AM, Sujatha Arun <su...@gmail.com> wrote:
> Thanks Erick.
>
> Regards
> Sujatha
>
> On Mon, Jan 23, 2012 at 11:16 PM, Erick Erickson <erickerickson@gmail.com
> >wrote:
>
> > You can have a large number of cores, so people have multiple
> > hundreds. Having multiple cores is preferred over having
> > multiple JVMs since it's more efficient at sharing system
> > resources. If you're running a 32 bit JVM, you are limited in
> > the amount of memory you can let the JVM use, so that's a
> > consideration, but otherwise use multiple cores in one JVM
> > and give that JVM say, half of the physical memory on the
> > machine and tune from there.
> >
> > Best
> > Erick
> >
> > On Sun, Jan 22, 2012 at 8:16 PM, Sujatha Arun <su...@gmail.com>
> wrote:
> > > Hello,
> > >
> > > We have in production a number of individual solr Instnaces on a single
> > > JVM.As a result ,we see that the permgenSpace keeps increasing with
> each
> > > additional instance added.
> > >
> > > I would Like to know ,if we can have solr cores , instead of individual
> > > instances.
> > >
> > >
> > > - Is there any limit to the number of cores ,for a single instance?
> > > - Will this decrease the permgen space as the LIB is shared.?
> > > - Would there be any decrease in performance with number of cores
> > added?
> > > - Any thing else that I should know before moving into cores?
> > >
> > >
> > > Any help would be appreciated?
> > >
> > > Regards
> > > Sujatha
> >
>
Re: Solr Cores
Posted by Sujatha Arun <su...@gmail.com>.
Thanks Erick.
Regards
Sujatha
On Mon, Jan 23, 2012 at 11:16 PM, Erick Erickson <er...@gmail.com>wrote:
> You can have a large number of cores, some people have multiple
> hundreds. Having multiple cores is preferred over having
> multiple JVMs since it's more efficient at sharing system
> resources. If you're running a 32 bit JVM, you are limited in
> the amount of memory you can let the JVM use, so that's a
> consideration, but otherwise use multiple cores in one JVM
> and give that JVM say, half of the physical memory on the
> machine and tune from there.
>
> Best
> Erick
>
> On Sun, Jan 22, 2012 at 8:16 PM, Sujatha Arun <su...@gmail.com> wrote:
> > Hello,
> >
> > We have in production a number of individual solr Instnaces on a single
> > JVM.As a result ,we see that the permgenSpace keeps increasing with each
> > additional instance added.
> >
> > I would Like to know ,if we can have solr cores , instead of individual
> > instances.
> >
> >
> > - Is there any limit to the number of cores ,for a single instance?
> > - Will this decrease the permgen space as the LIB is shared.?
> > - Would there be any decrease in performance with number of cores
> added?
> > - Any thing else that I should know before moving into cores?
> >
> >
> > Any help would be appreciated?
> >
> > Regards
> > Sujatha
>
Re: Solr Cores
Posted by Erick Erickson <er...@gmail.com>.
You can have a large number of cores, some people have multiple
hundreds. Having multiple cores is preferred over having
multiple JVMs since it's more efficient at sharing system
resources. If you're running a 32 bit JVM, you are limited in
the amount of memory you can let the JVM use, so that's a
consideration, but otherwise use multiple cores in one JVM
and give that JVM say, half of the physical memory on the
machine and tune from there.
Best
Erick
On Sun, Jan 22, 2012 at 8:16 PM, Sujatha Arun <su...@gmail.com> wrote:
> Hello,
>
> We have in production a number of individual solr Instnaces on a single
> JVM.As a result ,we see that the permgenSpace keeps increasing with each
> additional instance added.
>
> I would Like to know ,if we can have solr cores , instead of individual
> instances.
>
>
> - Is there any limit to the number of cores ,for a single instance?
> - Will this decrease the permgen space as the LIB is shared.?
> - Would there be any decrease in performance with number of cores added?
> - Any thing else that I should know before moving into cores?
>
>
> Any help would be appreciated?
>
> Regards
> Sujatha