我想记录启动后一段时间启动的服务的cpu和内存使用情况(
webappmgr.service
)。为此,我创建了另一个简单的日志记录服务,它依赖于它,并将在
webappmgr
开始调用
perftrace.service
。这将连续写入的输出
top
和
awk
到文件
/tmp/webapp.top
:
[Unit]
Description=Perftrace
After=webappmgr.service
[Service]
User=root
Type=oneshot
RemainAfterExit=yes
ExecStart=/bin/bash -c 'top -b -H -p $(pgrep webappmgr) | awk \'{ print strftime("%%H:%%M:%%S", systime())" " $0 }\' > /tmp/webapp.top &'
[Install]
WantedBy=webappmgr.service
当系统启动并且
webappmgr
正在运行,我启动
perftrace
通过
systemctl start perftrace
。在文件中
/tmp/webapp.top
我看到了我想看到的:
04:26:27 2596 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.27 webappmgr
04:26:27 2622 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.06 JSEngine
04:26:27 2628 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.01 webappmgr
04:26:27 2629 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.00 webappmgr
04:26:27 2630 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.00 webappmgr
04:26:27 2631 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.00 webappmgr
04:26:27 2632 testuser 20 0 1887640 24092 17068 S 0.0 0.5 0:00.00 FileDownloa+
但是,在启用之后
perftrace.service
并重新启动系统,以便在启动后立即启动
webappmgr
,我在文件中看到一个完全不同的输出:
04:31:03 %Cpu(s): 33.1 us, 17.7 sy, 0.1 ni, 41.2 id, 1.2 wa, 4.3 hi, 2.5 si, 0.0 st
04:31:03 KiB Mem : 4667484 total, 1369968 free, 2187548 used, 1109968 buff/cache
04:31:03 KiB Swap: 0 total, 0 free, 0 used. 2373988 avail Mem
04:31:03
04:31:06 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
04:31:06
04:31:06 top - 04:31:06 up 1 min, 1 user, load average: 40.87, 12.93, 4.54
04:31:06 Threads: 0 total, 0 running, 0 sleeping, 0 stopped, 0 zombie
04:31:06 %Cpu(s): 11.2 us, 15.5 sy, 0.0 ni, 66.8 id, 0.8 wa, 3.5 hi, 2.1 si, 0.0 st
04:31:06 KiB Mem : 4667484 total, 1362788 free, 2194416 used, 1110280 buff/cache
04:31:06 KiB Swap: 0 total, 0 free, 0 used. 2367116 avail Mem
04:31:06
04:31:09 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
04:31:09
04:31:09 top - 04:31:09 up 1 min, 1 user, load average: 40.87, 12.93, 4.54
04:31:09 Threads: 0 total, 0 running, 0 sleeping, 0 stopped, 0 zombie
04:31:09 %Cpu(s): 11.9 us, 16.2 sy, 0.0 ni, 66.0 id, 0.0 wa, 3.6 hi, 2.2 si, 0.0 st
04:31:09 KiB Mem : 4667484 total, 1358060 free, 2199204 used, 1110220 buff/cache
04:31:09 KiB Swap: 0 total, 0 free, 0 used. 2362388 avail Mem
04:31:09
当我手动启动perftrace服务时,我应该怎么做才能获得类似的输出?
