| Revisão | a50ec831988ad8e62bcfa6dbe861534b3bc5638f (tree) |
|---|---|
| Hora | 2015-04-20 04:47:09 |
| Autor | Lorenzo Isella <lorenzo.isella@gmai...> |
| Commiter | Lorenzo Isella |
A script to clear and reactivate the swap only when there is free memory available.
| @@ -0,0 +1,32 @@ | ||
| 1 | +#!/bin/bash | |
| 2 | + | |
| 3 | +# Make sure that all text is parsed in the same language | |
| 4 | +# export LC_MESSAGES=en_US.UTF-8 | |
| 5 | +# export LC_COLLATE=en_US.UTF-8 | |
| 6 | +# export LANG=en_US.utf8 | |
| 7 | +# export LANGUAGE=en_US:en | |
| 8 | +# export LC_CTYPE=en_US.UTF-8 | |
| 9 | + | |
| 10 | +# Calculate how much memory and swap is free | |
| 11 | +free_data="$(free)" | |
| 12 | +mem_data="$(echo "$free_data" | grep 'Mem:')" | |
| 13 | +free_mem="$(echo "$mem_data" | awk '{print $4}')" | |
| 14 | +buffers="$(echo "$mem_data" | awk '{print $6}')" | |
| 15 | +cache="$(echo "$mem_data" | awk '{print $7}')" | |
| 16 | +total_free=$((free_mem + buffers + cache)) | |
| 17 | +used_swap="$(echo "$free_data" | grep 'Swap:' | awk '{print $3}')" | |
| 18 | + | |
| 19 | +echo -e "Free memory:\t$total_free kB ($((total_free / 1024)) MB)\nUsed swap:\t$used_swap kB ($((used_swap / 1024)) MB)" | |
| 20 | + | |
| 21 | +# Do the work | |
| 22 | +if [[ $used_swap -eq 0 ]]; then | |
| 23 | + echo "Congratulations! No swap is in use." | |
| 24 | +elif [[ $used_swap -lt $total_free ]]; then | |
| 25 | + echo "Freeing swap..." | |
| 26 | + swapoff -a | |
| 27 | + swapon -a | |
| 28 | +else | |
| 29 | + echo "Not enough free memory. Exiting." | |
| 30 | + exit 1 | |
| 31 | +fi | |
| 32 | + |
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Bash-scripts/swap_management.sh