[Orca-users] Re: Out of memory error

[chris.giacomino at chase.com]

Prasad,

While I wish I had time to get into a better explanation, we are currently
running Orca on Solaris 2.5.1, 2.6, 2.7, and 2.8.  As Blair mentioned, with
Perl not giving memory back you are subject to the operating system's
ability to handle "taking" memory back.

On 2.5.1 we have experienced problems exactly along the lines of what you're
describing, and after some research we determined that Solaris 2.6 and up
have much better ability to do memory management, in particular taking back
memory from apps that aren't using it.

As a result, we restart Orca once a week on 2.5.1, and it runs fine on
everything else.

Regards,

Chris

-----Original Message-----
From: prasadjlv at yahoo.com [mailto:prasadjlv at yahoo.com] 
Sent: Friday, November 02, 2001 12:12 PM
To: orca-users at yahoogroups.com
Subject: [orca-users] Re: Out of memory error


Blair,

I am using Perl 5.61.

I have not seen these errors on a box running Solaris 7.


--prasad


--- In orca-users at y..., Blair Zajac <blair at o...> wrote:
> Which version of Perl are you using?  Perl never gives memory back
to the OS.
> 
> I try to make sure that Orca releases all references to objects
that contain
> memory, but this may not be done well enough, or there may be
circular
> references that never get cleaned up, or problems with Perl.  It's
hard
> to say.
> 
> Does anybody know how to determine where Perl memory usage is tied
up?
> 
> If you can restart Orca once a week or so, that would work great.
> 
> Blair
> 
> prasadjlv at y... wrote:
> > 
> > Blair,
> > 
> > I have been running Orca0.27b2 continuosly for about 2 weeks on a
Sun
> > E450 with 2 GB of RAM and 1 GB of swap. Also, Orca is monitoring
only
> > this machine.
> > 
> > Orca stops running after it runs out of memory and I end up
manually
> > restarting it. Why does it need that much memory?
> > 
> > Oh! one other thing, Orca is running on Solaris 2.5.1.
> > 
> > --prasad
> > 
> > --- In orca-users at y..., Blair Zajac <blair at o...> wrote:
> > > prasadjlv at y... wrote:
> > > >
> > > > Has any one seen this error:
> > > >
> > > > orca.log:Out of memory during "large" request for 266240
bytes,
> > total
> > > > sbrk() is 356677792 bytes
> > at /export/home/orca/lib/Orca/ImageFile.pm
> > > > line 318.
> > > >
> > > > I am running Orca0.27b2.
> > > >
> > > > Thanks in advance,
> > > >
> > > > --prasad
> > >
> > > This looks like it ran out of memory when it was creating an PNG
> > image (if
> > > you look at where /export/home/orca/lib/Orca/ImageFile.pm is).
> > Also, it
> > > looks like it was using a ton of memory, 356677792 = 340 Mbytes.
> > >
> > > Was this a brand new Orca run or has it been running a while?
Do
> > you keep
> > > Orca running continously?
> > >
> > > How many hostnames do you monitor?
> > >
> > > Blair
> > >
> > > --
> > > Blair Zajac <blair at o...> - Perl & sysadmin services for hire Web 
> > > and OS performance plots - http://www.orcaware.com/orca/
> 
> --
> Blair Zajac <blair at o...> - Perl & sysadmin services for hire
> Web and OS performance plots - http://www.orcaware.com/orca/