memory problem

AKHILESH S L · February 5, 2014, 02:54

hi everyone,
i am running cfx in our workstation having 64gb ram and 500 GB hard disc. rest of hdd memory is using foe rid backup. i am running a cfx with 5crore elements. but in each solution it is showing that "run time memory allocation error. not enough memory is available in your system". i am searching the solution for too many days. i have already read almost all the thread about memory in cfx forum. but i am not getting a solution. what may be problem friends? please help me. this 5crore is not a problem for a 65gb workstation having 12cores and using windows 7 64 bit. any help from anybody is appreciable. this is the last hope for my problem

ghorrocks · February 5, 2014, 06:24

The message means exactly what is says - you have run out of memory on your machine. Some possibilities are:
1) You have other applications running which means CFX cannot get the 64GB.
2) You have a 32 bit OS installed - check that you really do have a 64 bit OS.
3) You have the 32 bit version of CFX installed - then uninstall it and install the 64 bit version.

AKHILESH S L · February 5, 2014, 12:47

THANK YOU ghorrocks
I HAVE CHECKED THESE SOLUTIONS MANY TIMES.
no other applications are running in my workstation and my workstation is installed with a 64bit windows 7 and Ansys is also 64 bit version. what should i do to rectify this problem?

TrII4d · February 5, 2014, 12:53

hi AKHILESH S L,

try the following:
when u are in CFX-solver manager and the "Define Run" window appears select "Show Advanced Controls" in "Run Definition" ... after that u can go to "Partitioner" and there you can enter a value in the field "Memory Alloc Factor" ... the standard value is 1.0 ... increase this number with 1.2 or 1.4 ... after that u have to select "Detailed Memory Overrides" ... there u have to enter the same value in the field "Real Memory" ... but do NOT forget the suffix "x" i.e. 1.2x or 1.4x ... after that u can start the run ... maybe its better if u try 8 cores in a first run ...

good luck

AKHILESH S L · February 5, 2014, 13:02

THANK YOU TrII4d
thank you very much for spending your valuable time for this detailed reply. this is the first time i am getting a reply with a positive feeling. i will try this solution and let you know whether it works or not. thank you once again from the bottom of my heart.

TrII4d · February 5, 2014, 13:04

you are welcome

... i hope this works ... if not ... do not hesitate to ask ...

by the way ... trivandrum is a nice place ... i visited it last year

... great temple

ghorrocks · February 5, 2014, 17:46

At what stage of the solution do you get the memory error? (Pre-processor, partitioning, solving, post-processing?)

How big is the simulation you are running?

How are you running it? Single processor? Multiprocessor? (then how many processes?)

AKHILESH S L · February 6, 2014, 01:50

thank you TrII4d
it worked...

thanks a lot my dear friend. it is now running smoothly. thank you from the bottom of my heart. by the way you are always welcome to Trivandrum....god's own place...

AKHILESH S L · February 6, 2014, 01:52

dear ghorrocks
the error appeared in the solving stage only. now it got solved. running in local parallel 4 cores. total 2crore elements are there. thank you very much for your reply.

February 5, 2014, 02:54	memory problem	#1
AKHILESH S L New Member AKHILESH S L Join Date: Sep 2013 Location: Trivandrum Posts: 29 Rep Power: 13	hi everyone, i am running cfx in our workstation having 64gb ram and 500 GB hard disc. rest of hdd memory is using foe rid backup. i am running a cfx with 5crore elements. but in each solution it is showing that "run time memory allocation error. not enough memory is available in your system". i am searching the solution for too many days. i have already read almost all the thread about memory in cfx forum. but i am not getting a solution. what may be problem friends? please help me. this 5crore is not a problem for a 65gb workstation having 12cores and using windows 7 64 bit. any help from anybody is appreciable. this is the last hope for my problem

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February 5, 2014, 06:24		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	The message means exactly what is says - you have run out of memory on your machine. Some possibilities are: 1) You have other applications running which means CFX cannot get the 64GB. 2) You have a 32 bit OS installed - check that you really do have a 64 bit OS. 3) You have the 32 bit version of CFX installed - then uninstall it and install the 64 bit version.

February 5, 2014, 12:47		#3
AKHILESH S L New Member AKHILESH S L Join Date: Sep 2013 Location: Trivandrum Posts: 29 Rep Power: 13	THANK YOU ghorrocks I HAVE CHECKED THESE SOLUTIONS MANY TIMES. no other applications are running in my workstation and my workstation is installed with a 64bit windows 7 and Ansys is also 64 bit version. what should i do to rectify this problem?

February 5, 2014, 12:53		#4
TrII4d Member Join Date: Nov 2011 Location: Germany Posts: 40 Rep Power: 15	hi AKHILESH S L, try the following: when u are in CFX-solver manager and the "Define Run" window appears select "Show Advanced Controls" in "Run Definition" ... after that u can go to "Partitioner" and there you can enter a value in the field "Memory Alloc Factor" ... the standard value is 1.0 ... increase this number with 1.2 or 1.4 ... after that u have to select "Detailed Memory Overrides" ... there u have to enter the same value in the field "Real Memory" ... but do NOT forget the suffix "x" i.e. 1.2x or 1.4x ... after that u can start the run ... maybe its better if u try 8 cores in a first run ... good luck

February 5, 2014, 13:02		#5
AKHILESH S L New Member AKHILESH S L Join Date: Sep 2013 Location: Trivandrum Posts: 29 Rep Power: 13	THANK YOU TrII4d thank you very much for spending your valuable time for this detailed reply. this is the first time i am getting a reply with a positive feeling. i will try this solution and let you know whether it works or not. thank you once again from the bottom of my heart.

February 5, 2014, 13:04		#6
TrII4d Member Join Date: Nov 2011 Location: Germany Posts: 40 Rep Power: 15	you are welcome ... i hope this works ... if not ... do not hesitate to ask ... by the way ... trivandrum is a nice place ... i visited it last year ... great temple

February 5, 2014, 17:46		#7
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	At what stage of the solution do you get the memory error? (Pre-processor, partitioning, solving, post-processing?) How big is the simulation you are running? How are you running it? Single processor? Multiprocessor? (then how many processes?)

February 6, 2014, 01:50		#8
AKHILESH S L New Member AKHILESH S L Join Date: Sep 2013 Location: Trivandrum Posts: 29 Rep Power: 13	thank you TrII4d it worked... thanks a lot my dear friend. it is now running smoothly. thank you from the bottom of my heart. by the way you are always welcome to Trivandrum....god's own place...

February 6, 2014, 01:52		#9
AKHILESH S L New Member AKHILESH S L Join Date: Sep 2013 Location: Trivandrum Posts: 29 Rep Power: 13	dear ghorrocks the error appeared in the solving stage only. now it got solved. running in local parallel 4 cores. total 2crore elements are there. thank you very much for your reply.