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Struts & Hibernate
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| | | Garbace Collection executes 1GB but HEAP Size at 1.5GB! | Garbace Collection executes 1GB but HEAP Size at 1.5GB! 2007-01-10 - By -not available-
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> Hi,
>
> Just for your information ..
>
> Memmory is divided in young and old generation as object life increasin=
g it
> will occupy space i old generation,
>
> Please refer SUN JVM documentation.
>
> GC will keep happening once the memmory (Young generation )reached
> threshold.
>
> Young generation again divided in to survivor 0 and survivor 1 spaces.
> When a object is created it keeps allocating in survivor spaces
> alternatively.
> Two types of GC:
>
> Mini GC : Cleaning only with in young generation
> Full GC: If all objects present in young generation are alive so cleani=
ng
> happens in old generation hence will become FUll GC
>
> Following is the info I have sent a mail to some person (It may be usef=
ull)
>
> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---=
-- ---- ---- ---- ---- ---- ---- ---- --
> Setting heap size to -Xms256 -Xmx1024 will allocate memmory intially =
to
> 256 MB and keeps expanding as allocating more objects up to 1024.
> My recomendation to you is as mentioned in previos mail set heap size t=
o
> -Xms1536 -Xmx1536 and verify it.
>
> But Do not increase heap size blindly to greater values which may lead =
to
> performance issue(Pause times may become more to clean GC).
>
> try the heap settings and let me know, If still problem is there just s=
end
> the verbose output and log file.
>
> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---=
-- ---- ---- ---- ---- ---- ---- ---- --
>
> On 1/10/07, starki78 <starki78@(protected)> wrote:
> >
> > Hi I'm profiling my application with -verboseGC.
> > My maximum heap-size is
> > XMS is 1.5GB but the garbage collection always is executed
> > when about 1GB is reached.
> > Why is it so early?
> > Is there anything to control this?
> > I'm using Sun 1.4.2
> >
> > Thanks and nice greetings
> > Starki
> >
> >
> >
> >
> >
> >
> > -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
> > Passa a Infostrada. ADSL e Telefono senza limiti e senza canone Telec=
om
> > http://click.libero.it/infostrada10gen07
> >
> >
> >
> > -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------=
> > To start a new topic, e-mail: users@(protected)
> > To unsubscribe, e-mail: users-unsubscribe@(protected)
> > For additional commands, e-mail: users-help@(protected)
> >
> >
>
>
> --
> Suresh Babu,
> Software Engineer,
> Computer Associates-India
> =0A=0A=0A-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------=0APassa=
a Infostrada. ADSL e Telefono senza limiti e senza canone Telecom=0Ahttp=
://click.libero.it/infostrada11gen07=0A
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
To start a new topic, e-mail: users@(protected)
To unsubscribe, e-mail: users-unsubscribe@(protected)
For additional commands, e-mail: users-help@(protected)
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