Mathematica 9 is now available
Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
2001
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 2001

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: "No more memory "

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30193] Re: "No more memory "
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Thu, 2 Aug 2001 03:15:50 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <9k87t2$4uv$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

buy more RAM ???
Don't waste memory for the Frontend and the X-Window system,
and run the kernel alone.

AFAIK the most unix systems can't put active used memory 
in the swap space. If your "full" expression need more than
a GByte RAM the swap space does not matter. Only unused
processes like daemons, seeping processes are puted into the swap.

Since the equations are linear it is no problem to solve
it analytical with DSolve[] and

eq5 = DSolve[{d05'[z] == (a + \[ImaginaryI]*b)*dh5[z],    
                                              
      dh5'[z] == (a + \[ImaginaryI]*b)*d05[z] +
\[ImaginaryI]*c*\[Xi]*dh5[z],
                                              d05[0] == 1, dh5[0] == 0},
                                              {d05[z], dh5[z]},
                                             z]

gives a solution that can be plotted. When the solution are plotted
my IRIX box say 8715640 bytes where used.

Regards
  Jens


zosi wrote:
> 
> Hi,
> 
> We are working with the Takagi equations
> (see attached simplified notebook).
> To avoid the following Mathematica message
> 
> "No more memory available
>  Mathematica kernel has shut down
>  Try quitting other applications and try again"
> 
>  we have updated our platform which now is
> 
>    1 GB RAM, 2 GB swap, 23 GB free HD
>    Version 4.1
>    Linux RedHat 7.1, Kernel 2.4.2-2


> ---
>   4:35pm  up  4:23,  4 users,  load average: 4.39, 3.96, 3.34
> 2 processes: 1 sleeping, 1 running, 0 zombie, 0 stopped
> CPU states: 57.7% user, 42.2% system,  0.0% nice,  0.0% idle
> Mem:  1028792K av, 1024916K used,    3876K free,
> Swap: 2096440K av, 1103460K used,  992980K free, 762540K cached
>   PID USER  PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME COMMAND
> 32614 zosi    9   0  2404    4     4 S     0.0  0.0   0:02 Mathematica
>  2158 zosi   14   0 1394M 246M   436 R    37.0 24.5  25:27 MathKernel


  • Prev by Date: Re: Limit involving square root
  • Next by Date: Re: Any quantum chemists / physicists?
  • Previous by thread: Re: "No more memory "
  • Next by thread: problem with symbol and function declaration