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Posted to users@felix.apache.org by Daniel McGreal <da...@redbite.com> on 2013/12/05 09:07:47 UTC
Memory optimisation
Dear Felix Users,
I wonder if there is anyone with experience of optimising a Felix application's memory usage. Are there any OSGi or Felix centric tips?
Many thanks,
Dan.
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Re: Memory optimisation
Posted by Neil Bartlett <nj...@gmail.com>.
Classes are loaded when they are first needed. This is the case for Java in
general, not just OSGi.
If a bundle has no Bundle-Activator, then no classes will be loaded for the
bundle as a result of starting. The framework can even defer the creation
of a classloader for the bundle. Of course, some classes *may* be loaded
very shortly after activation, for example due to Declarative Services or
Blueprint declarations existing in that bundle.
On Thu, Dec 5, 2013 at 10:50 AM, Daniel McGreal <da...@redbite.com> wrote:
> Also, what is the impact of starting a bundle? For example, are all its
> classes loaded into memory at this time, or when they are first requested?
> Best, Dan.
>
> On 5 Dec 2013, at 09:00, Daniel McGreal wrote:
>
> > Thanks.
> > May I try a different question then?
> >
> > In Felix, is it known how memory requirements scale with OSGi
> functionality such as:
> > Quantity of bundles,
> > Quantity of wires,
> > Unused exported packages,
> > SCR and its various settings,
> > Anything else anyone can contribute,
> >
> > Best wishes, Dan.
> >
> > On 5 Dec 2013, at 08:22, Vadim <ni...@gmail.com> wrote:
> >
> >> I have such experience. Memory usage optimizations is application
> specific.
> >>
> >> On 12/05/2013 12:07 PM, Daniel McGreal wrote:
> >>> Dear Felix Users,
> >>>
> >>> I wonder if there is anyone with experience of optimising a Felix
> application's memory usage. Are there any OSGi or Felix centric tips?
> >>>
> >>> Many thanks,
> >>> Dan.
> >>> ---------------------------------------------------------------------
> >>> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> >>> For additional commands, e-mail: users-help@felix.apache.org
> >>>
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> >> For additional commands, e-mail: users-help@felix.apache.org
> >>
> >
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
>
Re: Memory optimisation
Posted by Daniel McGreal <da...@redbite.com>.
Also, what is the impact of starting a bundle? For example, are all its classes loaded into memory at this time, or when they are first requested?
Best, Dan.
On 5 Dec 2013, at 09:00, Daniel McGreal wrote:
> Thanks.
> May I try a different question then?
>
> In Felix, is it known how memory requirements scale with OSGi functionality such as:
> Quantity of bundles,
> Quantity of wires,
> Unused exported packages,
> SCR and its various settings,
> Anything else anyone can contribute,
>
> Best wishes, Dan.
>
> On 5 Dec 2013, at 08:22, Vadim <ni...@gmail.com> wrote:
>
>> I have such experience. Memory usage optimizations is application specific.
>>
>> On 12/05/2013 12:07 PM, Daniel McGreal wrote:
>>> Dear Felix Users,
>>>
>>> I wonder if there is anyone with experience of optimising a Felix application's memory usage. Are there any OSGi or Felix centric tips?
>>>
>>> Many thanks,
>>> Dan.
>>> ---------------------------------------------------------------------
>>> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
>>> For additional commands, e-mail: users-help@felix.apache.org
>>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
>> For additional commands, e-mail: users-help@felix.apache.org
>>
>
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Re: Memory optimisation
Posted by Daniel McGreal <da...@redbite.com>.
Thanks.
May I try a different question then?
In Felix, is it known how memory requirements scale with OSGi functionality such as:
Quantity of bundles,
Quantity of wires,
Unused exported packages,
SCR and its various settings,
Anything else anyone can contribute,
Best wishes, Dan.
On 5 Dec 2013, at 08:22, Vadim <ni...@gmail.com> wrote:
> I have such experience. Memory usage optimizations is application specific.
>
> On 12/05/2013 12:07 PM, Daniel McGreal wrote:
>> Dear Felix Users,
>>
>> I wonder if there is anyone with experience of optimising a Felix application's memory usage. Are there any OSGi or Felix centric tips?
>>
>> Many thanks,
>> Dan.
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
>> For additional commands, e-mail: users-help@felix.apache.org
>>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
Re: Memory optimisation
Posted by Vadim <ni...@gmail.com>.
I have such experience. Memory usage optimizations is application specific.
On 12/05/2013 12:07 PM, Daniel McGreal wrote:
> Dear Felix Users,
>
> I wonder if there is anyone with experience of optimising a Felix application's memory usage. Are there any OSGi or Felix centric tips?
>
> Many thanks,
> Dan.
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@felix.apache.org
> For additional commands, e-mail: users-help@felix.apache.org
>
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