CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

memory allocation error

Register Blogs Members List Search Today's Posts Mark Forums Read

Like Tree3Likes
  • 2 Post By Matthias
  • 1 Post By lynnmaeu

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 5, 2008, 07:37
Default memory allocation error
  #1
MAB
Guest
 
Posts: n/a
I keen getting the following message when i try to run solver. While there is about 50 GB storage available on the disk. what should I do to overcome this problem thank

*** Run-time memory allocation error *** | | Not enough free memory is currently available on the system. | | Could not allocate requested memory - exiting!
  Reply With Quote

Old   August 5, 2008, 07:50
Default Re: memory allocation error
  #2
Rogerio Fernandes Brito
Guest
 
Posts: n/a
how much do you have of memory RAM? I do some kind of simulations and my files are about 80 GB (trn files) and i donīt have this problem. I have only 8 GB of RAM.
  Reply With Quote

Old   August 5, 2008, 08:04
Default Re: memory allocation error
  #3
MAB
Guest
 
Posts: n/a
Hi Rogerio. it is about 4GB RAM. is it because of RAM that I am getting this message. well it is the same problem which i sent you yesterday for meshing. I have done meshing somehow. but now its giving the memory error.
  Reply With Quote

Old   August 5, 2008, 08:13
Default Re: memory allocation error
  #4
MAB
Guest
 
Posts: n/a
also the number of tetra is about 60,00000
  Reply With Quote

Old   August 5, 2008, 08:13
Default Re: memory allocation error
  #5
Rogerio Fernandes Brito
Guest
 
Posts: n/a
increase this memory allocation. When i worked with a Athlon PC XP with only 512 MB of RAM, i did it sometimes and it did work out.
  Reply With Quote

Old   August 5, 2008, 08:15
Default Re: memory allocation error
  #6
Rogerio Fernandes Brito
Guest
 
Posts: n/a
6,000,000.00 of elements?

If it is, you MUST increase your memory (RAM) up to 8 GB!
  Reply With Quote

Old   August 5, 2008, 10:11
Default Re: memory allocation error
  #7
John
Guest
 
Posts: n/a
I'm not sure if this is specifically a system specification problem but it sounds to me like you need to allot more memory for the solver and/or partitioner. Try setting a factor 1.2-2.0 for the partioner and see if that helps.

You might also try setting the expert parameter "topology estimate factor" to a factor of 1.2 or so.
  Reply With Quote

Old   August 5, 2008, 10:42
Default Re: memory allocation error
  #8
MAB
Guest
 
Posts: n/a
hi where I can find this partitioner settings. thanks
  Reply With Quote

Old   August 5, 2008, 10:53
Default Re: memory allocation error
  #9
John
Guest
 
Posts: n/a
If you're running CFX locally through the Solver Manager you'll find input boxes for memory overrides on the Partitioner and Solver tabs. If you submit the job over a network with a script you can set "-sizepar" and "-s" where -sizepar is the partitioner memory override factor and -s is the solver memory override factor.
  Reply With Quote

Old   August 5, 2008, 11:10
Default Re: memory allocation error
  #10
MAB
Guest
 
Posts: n/a
I am in CFX pre and I cant find partitioner option. i know the expert parameter
  Reply With Quote

Old   August 5, 2008, 11:12
Default Re: memory allocation error
  #11
John
Guest
 
Posts: n/a
The partitioner memory allocation option is set in the Solver Manager.
  Reply With Quote

Old   August 12, 2008, 12:09
Default Re: memory allocation error
  #12
Matthias
Guest
 
Posts: n/a
isnīt it like there is not enough free RAM for the Solver to run the simulation? The solver tries to allocate enough memory to store the values; if there isnīt enough... there is "not enough free memory available". I often could get rid of this by allocating less then the 100 percent... like 90. You need approximately 1GB for 500.000 hexaelements or about 1.5mio tetra-elements . Hope that helps.
  Reply With Quote

Old   August 12, 2008, 12:57
Default Re: memory allocation error
  #13
MAB
Guest
 
Posts: n/a
thanks. how can i change this option fom 100% to 90.???
  Reply With Quote

Old   August 13, 2008, 09:32
Default Re: memory allocation error
  #14
Matthias
Guest
 
Posts: n/a
From the Solver-GUI

Define Run-->"Show Advanced Controls"

Solver Tab--> Solver Memory,Memory Alloc Factor =0.9

lynnmaeu and shuaiwang1990 like this.
  Reply With Quote

Old   December 27, 2014, 20:26
Default
  #15
New Member
 
Thein Than Lin
Join Date: Dec 2014
Posts: 2
Rep Power: 0
lynnmaeu is on a distinguished road
Matthias said

From the Solver-GUI

Define Run-->"Show Advanced Controls"

Solver Tab--> Solver Memory,Memory Alloc Factor =0.9

It worked completely

thanks you very much, Matthias
shuaiwang1990 likes this.
lynnmaeu is offline   Reply With Quote

Old   December 30, 2014, 06:38
Default
  #16
Senior Member
 
Martin_Sz's Avatar
 
Marcin
Join Date: May 2014
Location: Poland, Swiebodzin
Posts: 229
Rep Power: 12
Martin_Sz is on a distinguished road
try to increase allocation memory factor to 10 on the three options on solver
second question is how many processors/cores /threads do you have ??
Try to divide your simulation on all processors/cores/threads
Martin_Sz is offline   Reply With Quote

Old   December 30, 2014, 21:59
Default
  #17
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143
ghorrocks is just really niceghorrocks is just really niceghorrocks is just really niceghorrocks is just really nice
The error message says "not enough free memory available". This is not a memory allocation problem so the memory allocation factor will not help it. It has simply run out of RAM so it needs more memory. If it was on a 32 bit system it may have maxxed out the 32 bit limit so needs a 64 bit OS and solver.
ghorrocks is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
ParaView for OF-1.6-ext Chrisi1984 OpenFOAM Installation 0 December 31, 2010 07:42
compile errors of boundary condition "expDirectionMixed" liying02ts OpenFOAM Bugs 2 February 1, 2010 21:11
POSDAT problem piotka STAR-CD 4 June 12, 2009 09:43
attach/detach (valve opening/closing) phsieh2005 OpenFOAM Running, Solving & CFD 2 March 21, 2009 06:18
OpenFOAM on MinGW crosscompiler hosted on Linux allenzhao OpenFOAM Installation 127 January 30, 2009 20:08


All times are GMT -4. The time now is 07:14.