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Author Topic: Swap File Problem  (Read 9287 times)

Capn_Fish

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Swap File Problem
« Reply #15 on: October 02, 2006, 10:39:30 pm »
As far as I know, you want to keep the file as small as you can. This will cause more RAM to be used (there is a larger amount of RAM available than swap, so more is available for use and will be used) and will wear on your card less. It will also decrease the effect on speed that swap has.

Once again, corrections are welcome.
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desertrat

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Swap File Problem
« Reply #16 on: October 02, 2006, 11:38:40 pm »
Quote
Actually, I was just wondering if what the advantages of a bigger swap file (maybe 64mb) might be?
The bigger it is the more programs you can run. I have a 256MB swap partition and usually have these programs running: dillo, mozilla (or firefox), abiword, stardict (with a number of large dictionaries), mrxvt, ka/pi, pwmanager, xmms ...
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uMP2k

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Swap File Problem
« Reply #17 on: October 02, 2006, 11:45:17 pm »
Quote
Quote
Actually, I was just wondering if what the advantages of a bigger swap file (maybe 64mb) might be?
The bigger it is the more programs you can run. I have a 256MB swap partition and usually have these programs running: dillo, mozilla (or firefox), abiword, stardict (with a number of large dictionaries), mrxvt, ka/pi, pwmanager, xmms ...
[div align=\"right\"][a href=\"index.php?act=findpost&pid=142924\"][{POST_SNAPBACK}][/a][/div]

Hmm - I will give "bigger" a go then.

I am addicted to running lots of stuff at the same time on my computers and that includes whatever my mobile device of the day is.

I am currently trying to get freeciv 2.10 beta 2 running and not having much luck, maybe a bigger swap will help!
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karlto

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Swap File Problem
« Reply #18 on: October 03, 2006, 12:30:18 am »
Quote
As far as I know, you want to keep the file as small as you can. This will cause more RAM to be used (there is a larger amount of RAM available than swap, so more is available for use and will be used) and will wear on your card less. It will also decrease the effect on speed that swap has.

Once again, corrections are welcome.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=142920\"][{POST_SNAPBACK}][/a][/div]
Actually, any modern OS should utilise swap correctly regardless. Often forcing programs to use RAM can degrade performance and proper use of swap/virtual mem is much better. It shouldn't put something needed fast on slow swap, but it will significantly increase the amount of available memory.

Now someone much more knowledgeable will come along and tell me I'm wrong
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Meanie

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Swap File Problem
« Reply #19 on: October 05, 2006, 10:05:48 am »
Quote
Quote
As far as I know, you want to keep the file as small as you can. This will cause more RAM to be used (there is a larger amount of RAM available than swap, so more is available for use and will be used) and will wear on your card less. It will also decrease the effect on speed that swap has.

Once again, corrections are welcome.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=142920\"][{POST_SNAPBACK}][/a][/div]
Actually, any modern OS should utilise swap correctly regardless. Often forcing programs to use RAM can degrade performance and proper use of swap/virtual mem is much better. It shouldn't put something needed fast on slow swap, but it will significantly increase the amount of available memory.

Now someone much more knowledgeable will come along and tell me I'm wrong
[div align=\"right\"][a href=\"index.php?act=findpost&pid=142926\"][{POST_SNAPBACK}][/a][/div]

swap will always be slower than real physical memory but when we dont have enough physical memory then we need to use swap at the sacrifice of speed. cacko/sharp rom have an applet that can monitor available memory and enable/disable swap depending on need. this does not exist on pdaXrom but would be a great app for someone to port over.

also, remember the general rule of thumb. swapfile should be around 2-2.5 times the amount of physical ram. ymwv
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bluedevils

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Swap File Problem
« Reply #20 on: October 05, 2006, 11:47:47 am »
I've learned that is not always true.  If you are using a system with 4GB of ram and you are constantly swapping a 1GB of hard drive space, then there is something wrong and 8GB of swap is not the solution.

You have to be carefull of swap when you use the Z as a usb reader.
« Last Edit: October 05, 2006, 11:49:03 am by bluedevils »
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bluedevils

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Swap File Problem
« Reply #21 on: October 05, 2006, 11:50:09 am »
Sorry meanie, I didn't see the word "general"
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InSearchOf

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Swap File Problem
« Reply #22 on: October 05, 2006, 11:58:14 am »
Actually... I thought the general rule of thumb was 1.5...  but on the Z I used 256.. just because I compile native apps and to much is never to much...

Late
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uMP2k

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Swap File Problem
« Reply #23 on: October 05, 2006, 06:34:38 pm »
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You have to be carefull of swap when you use the Z as a usb reader.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=143224\"][{POST_SNAPBACK}][/a][/div]


Please explain....

I use my Z as a card reader quite a bit at work and would like to know more about this.
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Capn_Fish

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Swap File Problem
« Reply #24 on: October 05, 2006, 07:09:21 pm »
I'd like to know how to use the Z as a card reader.
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karlto

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Swap File Problem
« Reply #25 on: October 05, 2006, 08:20:24 pm »
Quote
swap will always be slower than real physical memory but when we dont have enough physical memory then we need to use swap at the sacrifice of speed. cacko/sharp rom have an applet that can monitor available memory and enable/disable swap depending on need. this does not exist on pdaXrom but would be a great app for someone to port over.

also, remember the general rule of thumb. swapfile should be around 2-2.5 times the amount of physical ram. ymwv
[div align=\"right\"][a href=\"index.php?act=findpost&pid=143195\"][{POST_SNAPBACK}][/a][/div]
Obviously swap is much (much) slower than real memory, but it is quite curious that adding more swap will cause it to be used instead and degrade performance. Is this Linux-arm in general, or is it pdaXrom specific?
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uMP2k

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Swap File Problem
« Reply #26 on: October 05, 2006, 08:21:40 pm »
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I'd like to know how to use the Z as a card reader.
[div align=\"right\"][a href=\"index.php?act=findpost&pid=143279\"][{POST_SNAPBACK}][/a][/div]

As far as I know this only works with the Cxx00 series which have USB host built in.

Of course I may be wrong....
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