Swap: Difference between revisions
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Start top and press O then p to sort by swap. | Start top and press O then p to sort by swap. | ||
top -c | top -c | ||
Look | Look to see if any swap is being used. si and so is swap in and swap out. | ||
vmstat 1 | vmstat 1 | ||
To return swap to ram. | To return swap to ram. | ||
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sort processes on swap usage. | sort processes on swap usage. | ||
for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k2 -n | tail | for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k2 -n | tail | ||
for PROCESS in /proc/*/; do swapused=$(awk 'BEGIN { total = 0 } /^Swap:[[:blank:]]*[1-9]/ { total = total + $2 } END { print total }' ${PROCESS}/smaps 2>/dev/null || echo 0); if [ $swapused -gt 0 ]; then /bin/echo -e "${swapused}k\t$(cat ${PROCESS}/cmdline)"; fi; done | sort -nr | |||
Revision as of 09:53, 11 September 2019
How to handle swappiness
Start top and press O then p to sort by swap.
top -c
Look to see if any swap is being used. si and so is swap in and swap out.
vmstat 1
To return swap to ram.
swapoff -a; swapon -a
See swappiness value.
cat /proc/sys/vm/swappiness
To set swippiness value.
sudo sysctl vm.swappiness=0
sort processes on swap usage.
for file in /proc/*/status ; do awk '/VmSwap|Name/{printf $2 " " $3}END{ print ""}' $file; done | sort -k2 -n | tail
for PROCESS in /proc/*/; do swapused=$(awk 'BEGIN { total = 0 } /^Swap:blank:*[1-9]/ { total = total + $2 } END { print total }' ${PROCESS}/smaps 2>/dev/null || echo 0); if [ $swapused -gt 0 ]; then /bin/echo -e "${swapused}k\t$(cat ${PROCESS}/cmdline)"; fi; done | sort -nr