MESSAGE
| DATE | 2021-01-01 |
| FROM | Mithun Bhattacharya
|
| SUBJECT | Re: [Hangout - NYLXS] Confused about two development utils [EXT]
|
From hangout-bounces-at-nylxs.com Fri Jan 1 14:02:43 2021
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In-Reply-To: <20210101160738.GL15013-at-www2.mrbrklyn.com>
From: Mithun Bhattacharya
Date: Fri, 1 Jan 2021 10:38:39 -0600
Message-ID:
To: mod_perl list
Subject: Re: [Hangout - NYLXS] Confused about two development utils [EXT]
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Preload of what doesnt work ?
On Fri, Jan 1, 2021 at 10:08 AM Ruben Safir wrote:
> >
> > This isn=E2=80=99t quite true - if you load modules before the process =
forks
> then they can cleverly share the same parts of memory. It is useful to be
> able to "pre-load" core functionality which is used across all functions
> {this is the case in Linux anyway}. It also speeds up child process
> generation as the modules are already in memory and converted to byte cod=
e.
> >
> > One of the great advantages of mod_perl is Apache2::SizeLimit which can
> blow away large child process - and then if needed create new ones. This =
is
> not the case with some of the FCGI solutions as the individual processes
> can grow if there is a memory leak or a request that retrieves a large
> amount of content (even if not served), but perl can't give the memory
> back. So FCGI processes only get bigger and bigger and eventually blow up
> memory (or hit swap first)
> >
>
>
> The OS uses shared memory, and this is for any kind of forks. And FWIW,
> in GNU/Linux the difference between processes and threads is nominal.
> Everythings is light weight processes.
>
> This is an OK dsicussion of it
> https://www.thegeekstuff.com/2013/11/linux-process-and-threads/
>
> BTW - there is caching memory throughout the system from the hard drive,
> filesystem, in the OS, and in Perl.
>
> It would be NICE if the mod_perl code was FIXED so that it would
> compile with preload correctly out of the box.
>
>
> >
> >
> >
> >
> > --
> > The Wellcome Sanger Institute is operated by Genome Research
> > Limited, a charity registered in England with number 1021457 and a
> > company registered in England with number 2742969, whose registered
> > office is 215 Euston Road, London, NW1 2BE.
>
> --
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
> http://www.mrbrklyn.com
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive
> http://www.coinhangout.com - coins!
> http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
>
>
--00000000000010b26205b7d96098
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Preload of what doesnt work ?
_quote"> 0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=
>
> This isn=E2=80=99t quite true - if you load modules before the process=
forks then they can cleverly share the same parts of memory. It is useful =
to be able to "pre-load" core functionality which is used across =
all functions {this is the case in Linux anyway}. It also speeds up child p=
rocess generation as the modules are already in memory and converted to byt=
e code.
>
> One of the great advantages of mod_perl is Apache2::SizeLimit which ca=
n blow away large child process - and then if needed create new ones. This =
is not the case with some of the FCGI solutions as the individual processes=
can grow if there is a memory leak or a request that retrieves a large amo=
unt of content (even if not served), but perl can't give the memory bac=
k. So FCGI processes only get bigger and bigger and eventually blow up memo=
ry (or hit swap first)
>
The OS uses shared memory, and this is for any kind of forks.=C2=A0 And FWI=
W,
in GNU/Linux the difference between processes and threads is nominal.=C2=A0=
Everythings is light weight processes.
This is an OK dsicussion of it
rel=3D"noreferrer" target=3D"_blank">https://www.thegeekstuff.com/2013/11/=
linux-process-and-threads/
BTW - there is caching memory throughout the system from the hard drive,>
filesystem, in the OS, and in Perl.
It would be NICE if the mod_perl code was FIXED so that it would
compile with preload correctly out of the box.
>
>
>
>
> --
>=C2=A0 The Wellcome Sanger Institute is operated by Genome Research >
>=C2=A0 Limited, a charity registered in England with number 1021457 and=
a
>=C2=A0 company registered in England with number 2742969, whose registe=
red
>=C2=A0 office is 215 Euston Road, London, NW1 2BE.
--
So many immigrant groups have swept through our town
that Brooklyn, like Atlantis, reaches mythological
proportions in the mind of the world - RI Safir 1998
ht=
tp://www.mrbrklyn.com
DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
http:=
//www.nylxs.com - Leadership Development in Free Software
"_blank">http://www2.mrbrklyn.com/resources - Unpublished Archive
>http://www.coinhangout.com - coins!
ank">http://www.brooklyn-living.com
Being so tracked is for FARM ANIMALS and extermination camps,
but incompatible with living as a free human being. -RI Safir 2013
--00000000000010b26205b7d96098--
--===============0451009921==
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_______________________________________________
Hangout mailing list
Hangout-at-nylxs.com
http://lists.mrbrklyn.com/mailman/listinfo/hangout
--===============0451009921==--
--===============0451009921==
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--00000000000010b26205b7d96098
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Preload of what doesnt work ?
On Fri, Jan 1, 2021 at 10:08 AM Ruben Safir wrote:
> >
> > This isn=E2=80=99t quite true - if you load modules before the process =
forks
> then they can cleverly share the same parts of memory. It is useful to be
> able to "pre-load" core functionality which is used across all functions
> {this is the case in Linux anyway}. It also speeds up child process
> generation as the modules are already in memory and converted to byte cod=
e.
> >
> > One of the great advantages of mod_perl is Apache2::SizeLimit which can
> blow away large child process - and then if needed create new ones. This =
is
> not the case with some of the FCGI solutions as the individual processes
> can grow if there is a memory leak or a request that retrieves a large
> amount of content (even if not served), but perl can't give the memory
> back. So FCGI processes only get bigger and bigger and eventually blow up
> memory (or hit swap first)
> >
>
>
> The OS uses shared memory, and this is for any kind of forks. And FWIW,
> in GNU/Linux the difference between processes and threads is nominal.
> Everythings is light weight processes.
>
> This is an OK dsicussion of it
> https://www.thegeekstuff.com/2013/11/linux-process-and-threads/
>
> BTW - there is caching memory throughout the system from the hard drive,
> filesystem, in the OS, and in Perl.
>
> It would be NICE if the mod_perl code was FIXED so that it would
> compile with preload correctly out of the box.
>
>
> >
> >
> >
> >
> > --
> > The Wellcome Sanger Institute is operated by Genome Research
> > Limited, a charity registered in England with number 1021457 and a
> > company registered in England with number 2742969, whose registered
> > office is 215 Euston Road, London, NW1 2BE.
>
> --
> So many immigrant groups have swept through our town
> that Brooklyn, like Atlantis, reaches mythological
> proportions in the mind of the world - RI Safir 1998
> http://www.mrbrklyn.com
>
> DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
> http://www.nylxs.com - Leadership Development in Free Software
> http://www2.mrbrklyn.com/resources - Unpublished Archive
> http://www.coinhangout.com - coins!
> http://www.brooklyn-living.com
>
> Being so tracked is for FARM ANIMALS and extermination camps,
> but incompatible with living as a free human being. -RI Safir 2013
>
>
--00000000000010b26205b7d96098
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Preload of what doesnt work ?
_quote"> 0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">=
>
> This isn=E2=80=99t quite true - if you load modules before the process=
forks then they can cleverly share the same parts of memory. It is useful =
to be able to "pre-load" core functionality which is used across =
all functions {this is the case in Linux anyway}. It also speeds up child p=
rocess generation as the modules are already in memory and converted to byt=
e code.
>
> One of the great advantages of mod_perl is Apache2::SizeLimit which ca=
n blow away large child process - and then if needed create new ones. This =
is not the case with some of the FCGI solutions as the individual processes=
can grow if there is a memory leak or a request that retrieves a large amo=
unt of content (even if not served), but perl can't give the memory bac=
k. So FCGI processes only get bigger and bigger and eventually blow up memo=
ry (or hit swap first)
>
The OS uses shared memory, and this is for any kind of forks.=C2=A0 And FWI=
W,
in GNU/Linux the difference between processes and threads is nominal.=C2=A0=
Everythings is light weight processes.
This is an OK dsicussion of it
rel=3D"noreferrer" target=3D"_blank">https://www.thegeekstuff.com/2013/11/=
linux-process-and-threads/
BTW - there is caching memory throughout the system from the hard drive,>
filesystem, in the OS, and in Perl.
It would be NICE if the mod_perl code was FIXED so that it would
compile with preload correctly out of the box.
>
>
>
>
> --
>=C2=A0 The Wellcome Sanger Institute is operated by Genome Research >
>=C2=A0 Limited, a charity registered in England with number 1021457 and=
a
>=C2=A0 company registered in England with number 2742969, whose registe=
red
>=C2=A0 office is 215 Euston Road, London, NW1 2BE.
--
So many immigrant groups have swept through our town
that Brooklyn, like Atlantis, reaches mythological
proportions in the mind of the world - RI Safir 1998
ht=
tp://www.mrbrklyn.com
DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002
http:=
//www.nylxs.com - Leadership Development in Free Software
"_blank">http://www2.mrbrklyn.com/resources - Unpublished Archive
>http://www.coinhangout.com - coins!
ank">http://www.brooklyn-living.com
Being so tracked is for FARM ANIMALS and extermination camps,
but incompatible with living as a free human being. -RI Safir 2013
--00000000000010b26205b7d96098--
--===============0451009921==
Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Hangout mailing list
Hangout-at-nylxs.com
http://lists.mrbrklyn.com/mailman/listinfo/hangout
--===============0451009921==--
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