Linux系统清空swap脚本

第一次遇到top查看swap时发现已使用的的swap有18446744073659357796kB这么多，使用以下脚本清理

for pid in `ls -l /proc|grep ^d |awk '{print $9}'|grep -v [^0-9]`
do
    if [ $pid -eq 1 ]; then continue; fi
    grep -q Swap /proc/$pid/smaps 2>/dev/null
    if [ $? -eq 0 ]; then
        swap=$(grep Swap /proc/$pid/smaps \
            | gawk '{sum += $2;} END{print sum}')
        porc_name=$(ps aux | grep -w "$pid" | grep -v grep \
            | awk '{for(i = 11;i <= NF;i++){printf("%s ", $i)}}')
        if [ $swap -gt 0 ];then
            echo -e "${pid}\t${swap}\t${proc_name}"
        fi
    fi
done | sort -k2 -n | awk -F'\t' '{
    pid[NR] = $1;
    size[NR] = $2;
    name[NR] = $3;
}
END{
    for(id = 1; id <= length(pid); id++)
    {
        if(size[id] < 1024)
            1;
        else if(size[id] < 1048576)
            printf("%-10s\t%15.2fMB\t%s\n", pid[id], size[id]/1024, name[id]);
        else
            printf("%-10s\t%15.2fGB\t%s\n", pid[id], size[id]/1048576, name[id]);
    }

}'