Before getting into buyihg more computers, changing operating systems,
and the like, I would be sure that you have enough RAM under Windows.
If Stata is currently tapping into virtual memory--which quite possible
with a 100MB dataset on a Windows computer with 256MB of RAM--that would
slow down the process DRASTICALLY.
Try cutting your dataset in half and running on that. If the speed
increases vastly--more than the 100%* increase you might expect from
having half the data--that might be an indication that a relatively
cheep RAM upgrade would solve your problems.
Nick Winter
(*) Percentages calculated using the "Stata graphics upgrade"
methodology :-)
-----------------------------------------------------------
Nicholas Winter, Ph.D. P 202.939.5343
Policy Studies Associates F 202.939.5732
1718 Connecticut Avenue, NW [email protected]
Washington, DC 20009-1148 www.policystudies.com
-----------------------------------------------------------
> -----Original Message-----
> From: Peter Hedstrom [mailto:[email protected]]
> Sent: Friday, May 02, 2003 12:42 AM
> To: [email protected]
> Subject: st: Re: Re: Suggestions?
>
>
> Dear Eswar,
>
> Before purchasing your Sun Blade 150 I suggest that you make sure that
> it really performs better than a pentium for your type of application.
> A while ago we were in a similar situation to yours, and we ended up
> buying a sun blade. For our type of applications the Sun turned out to
> be much slower, however. For example, we ran the same program (a st
> cox) on both machines. On our old windows system (a P4, 1800 mhz) it
> took 3 minutes and 45 seconds to complete. On the Sun it took more
> than 12 minutes! We returned the Sun machine and bought the fastest
> available intel machine with 2gb in ram instead. This still is slow
> for some applications, but there is some comfort in knowing that it is
> as fast as it gets.
>
> Best,
> Peter
>
>
> ----- Original Message -----
> From: "Eswar Krishnan MD" <[email protected]>
> To: <[email protected]>
> Sent: Friday, May 02, 2003 12:14 AM
> Subject: st: Re: Suggestions?
>
>
> > Hi
> >
> > Thanks for the replies. Here is the situation:
> >
> > I have a dataset with about 5000 individuals, each with about 5
> > observations. I need to run panel data estimators like XTREGAR,
> XTGLS and
> > calculated bootstrapped CIs on smaller regression samples. The data
> set is
> > about 100MB. As I mentioned earlier I had a Pentium 4 256 MB
> computer (with
> > virtual memory left to be determined by the system). A do file with
> > univariate and multivariate analyses about 20 lines takes a good
> 20 -30
> > minutes to run. Add to this the time needed to construct the .do
> file (even
> > if is perform the debugging in a small subsample). Now after 1 run
> if I
> > realize that I want to make a change, it takes a whole length of
> time. In
> > addition, I am not able to do anything useful while STAT is running.
> >
> > I found from SUN representative that their Sunblade 150 can handle
> 5-6 gig
> > RAM easily as it is a 64 bit system. However, it costs a lot ( at
> least 5000
> > dollars with 2 gig RAM). So here am I........... Hope this
> information is
> > helpful to others.
> >
> > Eswar
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Eswar Krishnan MD" <[email protected]>
> > To: <[email protected]>
> > Sent: Tuesday, April 29, 2003 8:06 AM
> > Subject: st: Suggestions?
> >
> >
> > > Hello,
> > >
> > > I am relatively new to STATA8. I use a Pentium 4, 256MB PC but
> find
> > > calcualtions to be rather slow. Does anyone know about speed
> comparisons
> > > between SUN work stations and MAC (dual processor) as opposed to
> pentium?
> > >
> > > Thanks in advance
> > >
> > > Eswar Krishnan
> > > *
> > > * For searches and help try:
> > > * http://www.stata.com/support/faqs/res/findit.html
> > > * http://www.stata.com/support/statalist/faq
> > > * http://www.ats.ucla.edu/stat/stata/
> > >
> > *
> > * For searches and help try:
> > * http://www.stata.com/support/faqs/res/findit.html
> > * http://www.stata.com/support/statalist/faq
> > * http://www.ats.ucla.edu/stat/stata/
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
