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Author Topic: Out of Memory and Java HEAP  (Read 2256 times)
misaghb
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Posts: 7


« on: October 12, 2008, 09:16:40 AM »

Hi all,

I have Memory problem with Rapid-Miner.

Suppose I have a loop in my operator tree that should iterate 200 times. But in the 95th iteration Rapid-Miner fails to continue.
The out of memory error is related to Java heap.
I used MemoryCleanup operatpor every 40 iterations but again at the same iteration(95th) it halts!!
(I use some fileread and filewrite in every iteration)

I use Windows-Vista32 (Business Edition) and have 3GB RAM on my laptop.
I use Rapid-Miner 4.2.

I think there's no physical limitation and I should set something about virtual memory both in my Wndows and Rapid-Miner settings. Can anybody help me?

Regards,
-- Misagh.
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Tobias Malbrecht
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« Reply #1 on: October 12, 2008, 10:13:55 PM »

Hi Misagh,

in principal, there should be no limitations if you give Java enough memory and the application does not reach the given boundary. In practice, giving the JVM more memory than you phisically have is not a real option. But did you already give the Java virtual machine really all the memory you can? What does the memory monitor of RapidMiner (in the lower right corner say about the maximum memory used? And can you post your process setup? Maybe there is some operator which has excessive memory requirements ...?!

Regards,
Tobias
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Tobias Malbrecht
Director of Product Marketing
RapidMiner
amy
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Posts: 16


« Reply #2 on: October 15, 2008, 06:14:43 PM »

Hi all,
I got the same out of memory error. It seems like that there is a memory limitation with JVM which means with different java version.
Compay   JVM Vesion   Maximum memory(M)client   Maximum memory(M) server
SUN   1.5.x   1492   1520
SUN   1.5.5(Linux)   2634   2660
SUN   1.4.2   1564   1564
SUN   1.4.2(Linux)   1900   1260
IBM   1.4.2(Linux)   2047   N/A
BEA   JRockit 1.5 (U3)   1909   1902
Hopefully this will give you some idea about this problem.
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