Intermittant slow startup

[Michael Mossey]

Runnng python 2.2 on HP-UX, I get intermittant slow startup.
Sometimes python starts up in a small fraction of a second, and
sometimes takes 3-5 seconds. This applies to any script I run, or
just typing 'python' at the prompt.

I also observed something similar on Linux.

Any ideas what would cause *intermittant* slow startup?

-Mike

[Erik Max Francis]

Re: Intermittant slow startup

Michael Mossey wrote:
[color=blue]
> Runnng python 2.2 on HP-UX, I get intermittant slow startup.
> Sometimes python starts up in a small fraction of a second, and
> sometimes takes 3-5 seconds. This applies to any script I run, or
> just typing 'python' at the prompt.
>
> I also observed something similar on Linux.
>
> Any ideas what would cause *intermittant* slow startup?[/color]

Caching? Is it a long time between invocations that it takes a long
time to start up?

--
__ Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/
/ \ San Jose, CA, USA && 37 20 N 121 53 W && AIM erikmaxfrancis
\__/ A father is a thousand schoolmasters.
-- Louis Nizer

[Michael Mossey]

Re: Intermittant slow startup

Erik Max Francis <max@alcyone.co m> wrote in message news:<4071A86D. 97CA6CAE@alcyon e.com>...[color=blue]
> Michael Mossey wrote:
>[color=green]
> > Runnng python 2.2 on HP-UX, I get intermittant slow startup.
> > Sometimes python starts up in a small fraction of a second, and
> > sometimes takes 3-5 seconds. This applies to any script I run, or
> > just typing 'python' at the prompt.
> >
> > I also observed something similar on Linux.
> >
> > Any ideas what would cause *intermittant* slow startup?[/color]
>
> Caching? Is it a long time between invocations that it takes a long
> time to start up?[/color]

It is quite intermittant without much of a pattern I can see. One
thing that is definitely true is that if I start up python several
times in a row one right after the other, some can be slow and some
fast. I just observed it start fast twice, then start slow. I don't
remember if it ever does the other way around but I think it does.

-Mike

[simo]

Re: Intermittant slow startup

I've noticed that on Windows a lot, but not on Linux or Solaris.

[Andrew MacIntyre]

Re: Intermittant slow startup

On Tue, 5 Apr 2004, Michael Mossey wrote:
[color=blue]
> Erik Max Francis <max@alcyone.co m> wrote in message news:<4071A86D. 97CA6CAE@alcyon e.com>...[color=green]
> > Michael Mossey wrote:
> >[color=darkred]
> > > Runnng python 2.2 on HP-UX, I get intermittant slow startup.
> > > Sometimes python starts up in a small fraction of a second, and
> > > sometimes takes 3-5 seconds. This applies to any script I run, or
> > > just typing 'python' at the prompt.
> > >
> > > I also observed something similar on Linux.
> > >
> > > Any ideas what would cause *intermittant* slow startup?[/color]
> >
> > Caching? Is it a long time between invocations that it takes a long
> > time to start up?[/color]
>
> It is quite intermittant without much of a pattern I can see. One
> thing that is definitely true is that if I start up python several
> times in a row one right after the other, some can be slow and some
> fast. I just observed it start fast twice, then start slow. I don't
> remember if it ever does the other way around but I think it does.[/color]

is any resource coming from an NFS mount? or other network source?

--
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: andymac@bullsey e.apana.org.au (pref) | Snail: PO Box 370
andymac@pcug.or g.au (alt) | Belconnen ACT 2616
Web: http://www.andymac.org/ | Australia

[Michael Mossey]

Re: Intermittant slow startup

Andrew MacIntyre <andymac@bullse ye.apana.org.au > wrote in message news:<mailman.3 91.1081257204.2 0120.python-list@python.org >...[color=blue]
> On Tue, 5 Apr 2004, Michael Mossey wrote:
>[color=green]
> > Erik Max Francis <max@alcyone.co m> wrote in message news:<4071A86D. 97CA6CAE@alcyon e.com>...[color=darkred]
> > > Michael Mossey wrote:
> > >
> > > > Runnng python 2.2 on HP-UX, I get intermittant slow startup.
> > > > Sometimes python starts up in a small fraction of a second, and
> > > > sometimes takes 3-5 seconds. This applies to any script I run, or
> > > > just typing 'python' at the prompt.
> > > >
> > > > I also observed something similar on Linux.
> > > >
> > > > Any ideas what would cause *intermittant* slow startup?
> > >
> > > Caching? Is it a long time between invocations that it takes a long
> > > time to start up?[/color]
> >
> > It is quite intermittant without much of a pattern I can see. One
> > thing that is definitely true is that if I start up python several
> > times in a row one right after the other, some can be slow and some
> > fast. I just observed it start fast twice, then start slow. I don't
> > remember if it ever does the other way around but I think it does.[/color]
>
> is any resource coming from an NFS mount? or other network source?[/color]

I double-checked that and asked the sysadmin to check if the python
build was using any network source. I do have AFS and NFS drives
mounted on this machine, but I'm not reading any python code from them
as nearly as I can tell. PYTHONPATH points only to local disk.

-Mike