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Old 01-03-2013, 04:50 AM   #1
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How to reduce swap memory usage in Linux server

Frequently i am getting "swap memory usage is now 67%, which is above the error threshold (60%)" this error . How to reduce the swap memory usage .
Old 01-03-2013, 05:13 AM   #2
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Check which processes consume memory, for example by top, maybe they have a leak. If your server constantly require more memory to normal work, buy more RAM modules as swaping drastically decrases performance.
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Old 01-03-2013, 05:19 AM   #3
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Find out what is using the swap and do something to it. Or just get more RAM. Swap is after all a fallback for when you run out of RAM. Traditionally anyway. You could always add more swap if need be. Use dd to create a file, format it with a swap filesystem, and add it to the swap. By no means an efficient way to do it, but one option when other options are not immediately practical.

# dd if=/dev/zero of=fake.swap bs=8M count=10
# mkswap -v 1 fake.swap
# swapon -p -1 fake.swap
# swapon -s

About the only thing that was using swap on my desktop was icedtea-web. But I only have 1GB of RAM on this relic of a machine. So now I start my browser as follows.

$ JAVA_OPTS="-Xmx128m -Xms128m" padsp iceweasel
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Old 01-03-2013, 11:40 AM   #4
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You could add more memory -- it's very cheap right now.
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Old 01-03-2013, 05:17 PM   #5
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Originally Posted by ranjithm View Post
Frequently i am getting "swap memory usage is now 67%, which is above the error threshold (60%)" this error . How to reduce the swap memory usage .

LOL I bet your system is crawling!


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