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Redouane Boumghar wrote: |
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> Hello all, |
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> |
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> Grant wrote: |
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>> Also, I've noticed in top that when my server's 2GB of memory is |
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>> filled, it uses a small amount of swap (~24k) before it frees some up. |
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>> The "Swap: 24k" then remains. Is that normal? |
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> |
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> Yes I have also notice that after a heavy ram use I get this tiny |
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> space used on my swap. And it remains even after my ram has been half |
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> freed. |
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> My box has 1GB of ram and the small amount I sometime get on swap is |
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> 164KB and it can stay like that for 2 weeks, until i reboot. |
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> But I assume rebooting is not a great solution for a server :=) |
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> |
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> Writing to disk is too expensive as Pablo Antonio suggested, so once swap |
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> has been used it won't be cleaned until next use, but how to be sure |
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> it is cleaned at next use ? |
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|
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>From /etc/conf.d/rc: |
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|
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> # RC_SWAP_ERASE controls erasing of swap partitions at shutdown. |
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> # Useful for all those paranoid peeps to nuke their memory. |
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> |
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> RC_SWAP_ERASE="yes" |
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|
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|
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> |
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> Anyway if you want to have stats on the usage of your memory you can |
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> use 'free' |
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> but for a long-period log I would recommend 'vmstat' as it puts |
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> everything on one line so you could gnuplot it later. |
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> |
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> vmstat | grep -v [a-z] >> memory.log |
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> |
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> |
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> As Daniel Iliev suggested, there is the configurable sysctl for swap |
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> control solutions. The variables vm.swappiness and the |
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> vm.swap_token_timeout which |
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> control the "trashing behavior". I didn't really find much info on |
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> vm.swap_token_timeout. |
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> |
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> The man is not very extensive. |
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> Has Anyone more info on configuration of the file /etc/sysctl.conf ? |
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> especially for : |
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> vm.swappiness |
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> vm.swap_token_timeout |
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|
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You can put this in your /etc/sysctl.conf file: |
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|
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> vm.swappiness = 30 |
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|
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That is what I have in mine. It does work though. I have changed and |
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you can see the difference. |
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|
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> |
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> If we get a solution or just some more info, |
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> it would be nice to have a wiki page about it, wouldn't it ? ;) |
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> |
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> Have a Good Day, |
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> Red. |
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> |
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> ----------------------------------------+ |
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> MAGELLIUM @ http://www.magellium.fr/ |
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> ----------------------------------------+ |
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> |
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-- |
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