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st: AW: RE: Large Datasets Panel Data Logit Limits


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: RE: Large Datasets Panel Data Logit Limits
Date   Tue, 17 Nov 2009 09:22:13 +0100

<> 

" Fortunately, the perpetual license for Stata 10 option that I have allowed
me to do that with no additional cost, just obtaining a new license key.  "



Better still, get Stata 11 where there is no more distinction made between
32 and 64 bit...



HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Lee, Ken
Gesendet: Dienstag, 17. November 2009 01:23
An: statalist@hsphsun2.harvard.edu
Betreff: st: RE: Large Datasets Panel Data Logit Limits

The key issue is likely that you are running on a 32-bit machine.  When I
ran into this problem a Stata technical engineer said that 32-bit machines
are only able to allocate about 1GB per process.  So, allocating 1.5GB of
memory, as you did, has no more effect than allocating 1GB.  The only
solution given was to switch to a 64-bit machine with the 64-bit version of
Stata.   Fortunately, the perpetual license for Stata 10 option that I have
allowed me to do that with no additional cost, just obtaining a new license
key.  I don't know if that is the case with all license options.

Ken


===================
Ken Lee
MITRE Corporation
703-983-6273 (office)
703-304-6143 (mobile)
===================

"I would rather be exposed to the inconveniences attending too much liberty
than to those attending too small a degree of it."
    -- Thomas Jefferson, 1791

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Paul GERRANS
Sent: Monday, November 16, 2009 5:38 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Large Datasets Panel Data Logit Limits

Hi,
I have an unbalanced dataset with approx 2.4 million individuals with up to
10 observations over time (quarters). I have six regressors. The file size
is 630mb.
In trying to run a panel data logistic regression with group (individuals)
and time (quarter) random effects, I am receiving a r(902) error:

no room to add more variables because of width
An attempt was made to add a variable that would have increased the memory
required to store an observation beyond what is currently possible.  You
have the following alternatives:
1.  Store existing variables more efficiently; see help compress.
2.  Drop some variables or observations; see help drop.  (Think of Stata's
data area as the area of a rectangle; Stata can trade off width and length.)
3.  Increase the amount of memory allocated to the data area using the set
memory command; see help m
I have increased the mem to 1500mb which is the largest I can allocate. I
have dropped all variables I can and have compressed. I continue to get the
error.
I am using version 11 and I am using Windows Vista (32-bit).
Any suggestions as to what may be preventing the regression running or
anything I can do?
Thanks
Paul

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