62 lines
1.4 KiB
Fish
62 lines
1.4 KiB
Fish
#!/usr/bin/env fish
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# 用法: ./mem_monitor.fish <PID> [interval_seconds=5]
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# 比如： ./mem_monitor.fish 110303 5
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# 会在当前目录写一个 mem_usage_110303.log，每隔5秒记录一次RSS和VSZ（单位MB）。
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function usage
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echo "用法: mem_monitor.fish <PID> [interval_seconds=5]"
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exit 1
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end
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if test (count $argv) -lt 1
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usage
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end
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set pid $argv[1]
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set interval 5
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if test (count $argv) -gt 1
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set interval $argv[2]
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end
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# 输出到 mem_usage_<pid>.log
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set logfile mem_usage_$pid.log
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echo "写入日志: $logfile"
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echo "timestamp,rss_MB,vms_MB" > $logfile
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# 轮询检查
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while true
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# 获取 RSS/VSZ (KB) 值
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# 兼容 macOS 的 ps 命令，不使用 Linux 特有的选项
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set proc_line (ps -p $pid -o rss,vsz | tail -n +2 2>/dev/null)
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# 若取不到(进程已退出)，则停止
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if test -z "$proc_line"
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echo "进程 $pid 已退出或不存在."
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exit 0
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end
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# 将单行字符串通过空格拆分为数组，如 ("79673856" "95904664")
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set arr (string split ' ' (string trim $proc_line))
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if test (count $arr) -lt 2
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echo "解析 ps 输出时出现意外: $proc_line"
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exit 1
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end
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# 分别赋值
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set rss_kb $arr[1]
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set vsz_kb $arr[2]
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# 时间戳
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set t (date "+%Y-%m-%d %H:%M:%S")
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# 转换成 MB
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set rss_MB (math "$rss_kb / 1024.0")
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set vsz_MB (math "$vsz_kb / 1024.0")
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# 写日志
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echo "$t,$rss_MB,$vsz_MB" >> $logfile
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sleep $interval
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end
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