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How much Virtual Memory do I need? 
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Joined: 2011-09-09 15:54:28
Posts: 14
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In the spirit of the New Year I decidied to install the Mesh CV on my craptop, even with trepidation that it wouldn't be up to the task. 2 things I noticed right off. First, I get a Low Virtual Memory message. So, after googling a bit to see what that means and how to fix it, I started bumping it up, in small icrements. I still haven't found the magic number yet, and it is a bit tedious , having to change, restart, try the viewer, log off, change the memory, restart the computer, etc , etc. So is there a minimum value I need, or a percentage of total memory or something? I only have 1 GB of memory in the thing. Second, I don't know if this is releated, but when I bring a dropdown menu up, it doesn' stay more than a couple of seconds before sliding away.


2012-01-07 14:49:42
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Joined: 2009-03-17 18:42:51
Posts: 6028
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v1.26.3.0 and v1.26.2.12 should not show off this behaviour any more on computers with low RAM amount since they got the "Allow Swapping" setting on by default and don't reset the camera view every second or so when the memory gets very low.

As for the swap file size, it's not directly linked to the usable virtual memory by a process: the usable virtual memory will also depend on the amount of RAM you got (since you can't use more non-swapped virtual memory than the amount of free RAM on your system) and on the OS (32 or 64bits, and in the former case whether it is configured to allow for more than 1Gb of virtual memory per process or not(*)). It is usually recommended to choose a size which is at least 1.5 times the size of your RAM (so, for 1Gb RAM, you could use a 1.5Gb or larger swap file).

One thing is certain: mesh viewers use 20% more memory than non-mesh viewers, and 1Gb of RAM is not really comfortable an amount for them...



(*) Under 32bits Windows (and provided you got more than 1Gb RAM), to benefit from the max 3Gb virtual memory usable by programs linked with the /LARGEADDRESSAWARE option (such as the Cool VL Viewer), you need to setup your boot loader options accordingly. I found a good description of the process here.


2012-01-07 16:05:20
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Joined: 2011-09-09 15:54:28
Posts: 14
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Thank you. I'll stay Meshless then for the time being.

ETA: THanks for moving this. I realized after I posted it probably should go here.


2012-01-07 16:47:51
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