Re: [Help-glpk] glp_malloc: no memory available

[Reginald Beardsley]

You don't say what OS you're using, so I'll have to be very general.  It means you've run out of virtual memory.  You need to increase the space.  It's called a "paging file" in Windows and "swap partition" in Unix/Linux.  Note you can also use a file for swap space in Unix, but the traditional allocation has been a separate disk partition.

When disk was expensive, the rule of thumb was swap = 4 X DRAM.  However, disk is now so cheap I use swap = 8 x DRAM.
If you don't need the space it has no effect on performance.  It's just wasted disk space.

DRAM is hundreds of times faster than a hard drive, so there's a big performance hit if you start paging.  If you can't add more DRAM to your system, adding a solid state disk for swap space will be much faster than a regular hard drive.

Have Fun!
Reg

--- On Mon, 7/16/12, David Myers <address@hidden> wrote:

From: David Myers <address@hidden>
Subject: [Help-glpk] glp_malloc: no memory available
To: address@hidden
Date: Monday, July 16, 2012, 12:44 PM

Hello,

I am building an LP using GLPK_4_47 in eclipse and am receiving the error:

glp_malloc: no memory available

Error detected in file ..\src\glpenv05.c at line 70

Exception in thread "main" org.gnu.glpk.GlpkException: function glp_add_rows failed

at org.gnu.glpk.GLPKJNI.glp_add_rows(Native Method)

at org.gnu.glpk.GLPK.glp_add_rows(GLPK.java:230)

at cmif.LPWeighting.LPWeighting.developIMinusKConstraintsMax(LPWeighting.java:234)

at cmif.LPWeighting.LPWeighting.singleOutputMaxLP(LPWeighting.java:56)

at tests.MassSamplingLPTest.main(MassSamplingLPTest.java:30)

If anyone has any help at all, it would be much appreciated.  Thanks.

--David

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