How can one use the physical memory of our system rather than virtual memory while running Labview?
We have a Windows NT system with 2 Gb of physical memory and would like to utilize the RAM fully using Labview. What usually occurs is that Labview uses a tremendous amount of page file space while a majority of the physical memory is unused. Is there a way to configure Labview (or our system) to overcome this problem? It seems that our processes would be much faster if they were mainly using the physical memory. Is it possible to trick the system, by creating a RAM disk and allocating this as virtual memory space?
> We have a Windows NT system with 2 Gb of physical memory and would
> like to utilize the RAM fully using Labview. What usually occurs is
> that Labview uses a tremendous amount of page file space while a
> majority of the physical memory is unused. Is there a way to
> configure Labview (or our system) to overcome this problem? It seems
> that our processes would be much faster if they were mainly using the
> physical memory. Is it possible to trick the system, by creating a
> RAM disk and allocating this as virtual memory space?
LabVIEW the application doesn't know anything about physical versus
virtual memory. LV asks the OS for general purpose memory and goes
from there.
Drivers like DAQ and IMAQ will have a combination of general user
memory and page lo
cked physical buffers.
I'm not up on the details, but this is something that the OS is in
control of, so that is where you need to look for the solution. One
of the things to look at is the disk cache. By default, I think that
NT takes a percentage of the RAM to use for disk cache. With that
much RAM, this is probably unnecessary and is using too much.
Similarly, the OS may be attempting to keep the working set size
to a fraction of the total RAM to reserve space for other things.
It doesn't make sense to me, but then I don't work for MS.
Greg McKaskle
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Solved!
Go to Solution.Hi,
I have attached here an example of doing the same using shift registers and local variables. Take a look. Shift register is always a better option than local variables.
Regards,
Nitzz
(Give kudos to good answers, Mark it as a solution if your problem is Solved)
Attachments:
Graph and shift registers.vi 12 KB
graph and local variables.vi 12 KB -
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Thanks in advance.Thank you very much. I'll be waiting for you message.
Messaggio originale----
Da: [email protected]
Data: 26/01/2015 17.56
A: "Umberto Gangi"<[email protected]>
Ogg: How can I use the "Copy and paste" tool in order get stamps in the same position in different pages (Acrobat XI for PC)?
How can I use the "Copy and paste" tool in order get stamps in the same position in different pages (Acrobat XI for PC)?
created by Gilad D (try67) in Creating, Editing & Exporting PDFs - View the full discussion
Well, I was in the same situation so I've developed a tool that allows one to do it. I will send you some additional information about it in a private message.
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Message was edited by: EZ Jim -
How can i use the same cursor in a loop fro multipletimes.
I am using two cursors.One to fetch sites and the other to fetch participants under each site.I am performing some job with that participants data.Now the problem is i am using the 2nd cursor in a loop.So it fetches the data of participants falling under one state.But when it comes to the second state,as the second cursor is already open it is unable to fetch the records.Please help me .How can i use the same cursor in a loop fro multipletimes.
I am sending the code which i have written in When-Button-Pressed-Trigger...
declare
sid number;
pid number;
cursor csid is select distinct(site_id) from cyber_ppt;
cursor cpid is select pc_id,st_dt,ed_dt from cyber_ppt where site_id = sid;
stdt varchar2(10);
eddt varchar2(10);
nom number;
stmonth varchar2(10);
edmonth varchar2(10);
cjan number:=0;
cfeb number:=0;
cmar number:=0;
capr number:=0;
cmay number:=0;
cjun number:=0;
cjul number:=0;
caug number:=0;
csep number:=0;
coct number:=0;
cnov number:=0;
cdec number:=0;
i number:=1;
begin
open csid ;
loop
fetch csid into sid;
exit when csid %notfound;
message(sid);
open cpid;
loop
fetch cpid into pid,stdt,eddt ;
exit when cpid %notfound;
message(sid||'-'||pid);
stmonth:=substr(stdt,4,3);
edmonth:=substr(eddt,4,3);
nom:= months_between(eddt,stdt);
while i <= round(nom)
loop
stmonth:=substr(stdt,4,3);
if stmonth='JAN' then
cjan:=cjan+1;
elsif stmonth='FEB' then
cfeb:=cfeb+1;
elsif stmonth='MAR' then
cmar:=cmar+1;
elsif stmonth='APR' then
capr:=capr+1;
elsif stmonth='MAY' then
cmay:=cmay+1;
elsif stmonth='JUN' then
cjun:=cjun+1;
elsif stmonth ='JUL' then
cjul:=cjul+1;
elsif stmonth ='AUG' then
caug:=caug+1;
elsif stmonth ='SEP' then
csep:=csep+1;
elsif stmonth ='OCT' then
coct:=coct+1;
elsif stmonth ='NOV' then
cnov:=cnov+1;
elsif stmonth ='DEC' then
cdec:=cdec+1;
end if;
stdt:=add_months(stdt,1);
i:=i+1;
end loop;
end loop;
end loop;
end;
try this /* untested */
DECLARE
sid NUMBER;
pid NUMBER;
CURSOR csid IS SELECT DISTINCT(site_id) FROM cyber_ppt;
CURSOR cpid(nSid NUMBER) is SELECT pc_id,st_dt,ed_dt FROM cyber_ppt WHERE site_id = nSid;
stdt VARCHAR2(10);
eddt VARCHAR2(10);
nom NUMBER;
stmonth VARCHAR2(10);
edmonth VARCHAR2(10);
cjan NUMBER:=0;
cfeb NUMBER:=0;
cmar NUMBER:=0;
capr NUMBER:=0;
cmay NUMBER:=0;
cjun NUMBER:=0;
cjul NUMBER:=0;
caug NUMBER:=0;
csep NUMBER:=0;
coct NUMBER:=0;
cnov NUMBER:=0;
cdec NUMBER:=0;
i NUMBER:=1;
BEGIN
FOR rec IN csid
LOOP
sid := rec.csid;
FOR cRec IN cpid(sid)
LOOP
pid := cRec.pc_id;
stdt := cRec.st_dt;
eddt := cRec.ed_dt;
stmonth:= SUBSTR(stdt,4,3);
edmonth:= SUBSTR(eddt,4,3);
nom:= months_between(eddt,stdt);
WHILE i <= round(nom)
LOOP
stmonth := SUBSTR(stdt,4,3);
IF stmonth='JAN'
THEN
cjan:=cjan+1;
ELSIF stmonth='FEB' THEN
cfeb:=cfeb+1;
ELSIF stmonth='MAR' THEN
cmar:=cmar+1;
ELSIF stmonth='APR' THEN
capr:=capr+1;
ELSIF stmonth='MAY' THEN
cmay:=cmay+1;
ELSIF stmonth='JUN' THEN
cjun:=cjun+1;
ELSIF stmonth ='JUL' THEN
cjul:=cjul+1;
ELSIF stmonth ='AUG' THEN
caug:=caug+1;
ELSIF stmonth ='SEP' THEN
csep:=csep+1;
ELSIF stmonth ='OCT' THEN
coct:=coct+1;
ELSIF stmonth ='NOV' THEN
cnov:=cnov+1;
ELSIF stmonth ='DEC' THEN
cdec:=cdec+1;
END IF;
stdt:=add_months(stdt,1);
i:=i+1;
END LOOP;
END LOOP;
END LOOP;
END;
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