Austin,
My -profile.ado- file uses the following routine when I open
a dataset by double-clicking in XP (so if the argument is a .dta
file):
if "`1'"~="" {
if (index("`1'",".dta")>0) {
d using "`1'", short
local size = int(r(width)*r(N)*1.5/(2^20))
local size = max(10,`size')
set mem `size'm
use "`1'"
}
}
So -describe- returns the width & obs and I figured by trial
and error that in memory a dataset needs r(width)*r(N)*1.5/(2^20)
MB.
hth,
Jeph
Austin Nichols wrote:
Julian & Bill--
As nice as the -memory- command is, it has the downside of requiring
you to load the data in memory before issuing the command, whereas the
-describe- command has the handy using option. If you are deciding
how much memory to allocate with -set mem Xm- for example, it's
helpful to not have to load the data first.
--Austin
On 12/5/06, William Gould, Stata <[email protected]> wrote:
Julian Reif <[email protected]> asked,
> Is there a Stata command available that returns the size of the
dataset in
> memory? I am running a series of very long scripts at the same
time on a
> server and am performing an analysis to determine what the optimal
memory
> allocation should be for each series of scripts. I know that the
-describe-
> command will tell you the size, but it does not return the value in
a local
> and I'd rather not go hunting through log files if possible.
I suggest Julian try the -memory- command, which presents a report
and leaves
results behind in r(). The results are different that those reported by
-describe- but they may be more in line with what Julian wants, as these
numbers are more system related and include overhead.
-- Bill
[email protected]
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