如果CPU Utilization在5%-10%之间则基本上对系统没有影响,可以不关注。但如果在80%-90%,或者更高的话,就可能出现处理器性能瓶颈了。 User Time - 用户时间 描述CPU耗费在用户进程上的百分比,包括Nice time。如果User Time值很高,则表明系统正在执行实际的工作。 System Time - 系统时间 描述CPU耗费在内核操作上...
TT cpu = new TT(); System.out.println("---cpu used:" + cpu.getCpuUsage() + "%"); System.out.println("---mem used:" + cpu.getMemUsage() + "%"); System.out.println("---HD used:" + cpu.getDeskUsage() + "%"); System.out.println("---jvm监控---"); Runtime lRunti...
CPU usage is currentlyexpressed as the percentage of time spent running during the entire lifetime ofa process. This is not ideal, and it does not conform to the standards that psotherwise conforms to. CPU usage is unlikely to add up to exactly 100%. %cpu cpu utilization of the process i...
CPU usage is currentlyexpressed as the percentage of time spent running during the entire lifetime ofa process. This is not ideal, and it does not conform to the standards that psotherwise conforms to. CPU usage is unlikely to add up to exactly 100%. %cpu cpu utilization of the process i...
The statistics reported by sar concern I/O transfer rates, paging activity, process-related activities, interrupts, network activity, memory and swap space utilization, CPU utilization, kernel activities and TTY statistics, among others. The sadf command may be used to display data collected by sar...
Linux-iostat-command iostat 命令用于监视 CPU 利用率和所有磁盘和文件系统的I/O 统计息,nfsiostat 命令用于监视网络文件系统(NFS)的 I/O 统计信息。 Iostat 命令通过观察时间,传输速率来监视 I/O 设备。此命令特别有用,可以用来生成报告,我们可以用来优化系统的输入和输出负载。 Iostat 命令通常会生成两个报告: ...
[ Get the guide toinstalling applications on Linux. ] Show RAM information For basic RAM utilization information, use the commandfree: $ free -m total used free shared buff/cache available Mem: 3899 269 2616 13 1013 3396 Swap: 3898 0 3898 ...
可以用下面的命令将 cpu 占用率高的线程找出来: ps H -eo user,pid,ppid,tid,time,%cpu,cmd --sort=%cpu 这个命令首先指定参数'H',显示线程相关的信息,格式输出中包含:user,pid,ppid,tid,time,%cpu,cmd,然后再用%cpu字段进行排序。这样就可以找到占用处理器的线程了。
可以用下面的命令将 cpu 占用率高的线程找出来: ps H -eo user,pid,ppid,tid,time,%cpu,cmd --sort=%cpu 这个命令首先指定参数'H',显示线程相关的信息,格式输出中包含:user,pid,ppid,tid,time,%cpu,cmd,然后再用%cpu字段进行排序。这样就可以找到占用处理器的线程了。
Another useful command to get CPU related stats is mpstat. Here is an example output:# mpstat -P ALL 5 2 Linux 2.6.9-67.ELsmp (oraclerac1) 12/20/2008 10:42:38 PM CPU %user %nice %system %iowait %irq %soft %idle intr/s 10:42:43 PM all 6.89 0.00 44.76 0.10 0.10 0.10 48.05...