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Re: st: OS memory availability

From   David Kantor <>
Subject   Re: st: OS memory availability
Date   Tue, 30 Mar 2004 16:20:41 -0500

I see that we are asking about two different things: the maximal possible memory you can request, and the amount you can request without going into virtual memory. But in either case, we seem to be getting our results by experimentation -- and getting rough results. It would be much better if there were a way to directly and exactly get the info we seek.

-- David

At 02:23 PM 3/30/2004 -0600, you wrote:

Thanks for the comments. I wrote the following program to try to get at the issue. It reports back the level of memory that does not get an "op. sys. refuses to provide memory" error.

*! memtest.ado v1.0.0 fw 3/30/04 determines maximum allowable memory
*! and current memory. Allowable value is passed on in local memtest
*! keywords: memory
program define memtest
version 8.2
qui query memory
local oldmem = `r(memory)'
local memtest = 2000
while `memtest' > 100 {
cap set mem `memtest'm
*di "`memtest' " _rc
if _rc == 0 {
di in green "Maximum value of memory allowed by OS is " in yellow"`memtest'm"
continue, break
local memtest = `memtest' - 100
* di "`oldmem'"
set mem `oldmem'k

David Kantor
Institute for Policy Studies
Johns Hopkins University

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