请教下 如何查看一台机器 一秒钟的并发量和请求量呢

请教下 如何查看一台机器 一秒钟的并发量和请求量呢
还有如何判断已经到了瓶颈了呢？

please run 'netstat -na' command,and then count the amount of ESTABLISHED status of web service,this result is your concurrent request per second.

run 'vmstat' to check for bottleneck ,the value of R column is more than 1 ,which indicates that your system is little busy.if this value is more than the amount of  cpus in your system.your system have reached  the bottleneck.it is probably too busy to work properly