服务器负载和资源查看和诊断相关命令使用

free -m
                total       used       free     shared    buffers     cached
Mem:         64407      61313       3094          0        550      55163
-/+ buffers/cache:       5599      58807
Swap:            0          0          0

显示可用内存58807M,总内存64407M  

主要看 load average和是否有些不明进程在运行，用pidstat查看对应进程的资源使用情况

查看5861进程
pidstat -r -p 5861 3
08:41:08 AM       PID  minflt/s  majflt/s     VSZ    RSS   %MEM  Command
08:41:11 AM      5861      1.00      0.00  664944 216948   0.33  pusher
08:41:14 AM      5861      1.00      0.00  664944 216948   0.33  pusher
08:41:17 AM      5861      1.00      0.00  664944 216948   0.33  pusher
08:41:20 AM      5861      1.00      0.00  664944 216948   0.33  pusher
08:41:23 AM      5861      1.00      0.00  664944 216948   0.33  pusher
08:41:26 AM      5861      1.00      0.00  664944 216948   0.33  pusher 
pidstat -u -p 5861 3
08:43:46 AM       PID    %usr %system  %guest    %CPU   CPU  Command
08:43:49 AM      5861    2.00    2.67    0.00    4.67     8  pusher
08:43:52 AM      5861    1.67    3.00    0.00    4.67     8  pusher
pidstat -d -p 5861 3
08:44:48 AM       PID   kB_rd/s   kB_wr/s kB_ccwr/s  Command
08:44:51 AM      5861      0.00      0.00      0.00  pusher
08:44:54 AM      5861      0.00      6.67      0.00  pusher
08:44:57 AM      5861      0.00      0.00      0.00  pusher
08:45:00 AM      5861      0.00      0.00      0.00  pusher
08:45:03 AM      5861      0.00      0.00      0.00  pusher

如查看nginxps aux | grep nginx
23131    18314  0.0  0.0 24084 2288 ?        S    Jul06   7:40 nginx: worker process
23131    18315  0.0  0.0 24084 2128 ?        S    Jul06   7:52 nginx: worker process
23131    18316  0.0  0.0 24084 2284 ?        S    Jul06   0:47 nginx: worker process
23131    18317  0.0  0.0 24084 2288 ?        S    Jul06   7:22 nginx: worker process
23131    18318  0.0  0.0 24084 2292 ?        S    Jul06   7:26 nginx: worker process
23131    18319  0.0  0.0 24084 2292 ?        S    Jul06   6:39 nginx: worker process

netstat -ant | grep 8099

tcp        0      0 0.0.0.0:8099                0.0.0.0:*                   LISTEN
tcp        0      0 10.99.23.15:8777            172.22.146.63:58099         ESTABLISHED  

ping baidu.com

PING baidu.com (180.149.132.47): 56 data bytes
64 bytes from 180.149.132.47: icmp_seq=0 ttl=52 time=5.500 ms
64 bytes from 180.149.132.47: icmp_seq=1 ttl=52 time=5.478 ms

telnet 10.99.23.15 8099

Trying 10.99.23.15...
Connected to cp01-rdqa-dev194.cp01.baidu.com.
Escape character is '^]'.
^]

df -h

du -sh *
516K	controllers
4.0K	favicon.ico
4.0K	index.php
2.1M	library
4.0K	link.sh

lsof | grep deleted

kill -9 pid

一般结合awk和xargs使用
ps aux | grep nginx | awk '{pirnt $2;}' | xargs kill -9