리눅스 top

시스템의 전체적인 운영상황을 모니터링할 수 있는 명령어

• 시스템의 CPU, 메모리, 디스크 이용 상황 뿐만 아니라 전체 프로세스의 운영상황을 실시간으로 모니터링할 수 있다.

실행 결과 예시

# top
top - 19:42:29 up 117 days,  9:36,  1 user,  load average: 0.03, 0.08, 0.08
Tasks: 129 total,   2 running, 127 sleeping,   0 stopped,   0 zombie
Cpu(s):  3.0%us,  0.3%sy,  0.0%ni, 96.5%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st
Mem:   1019860k total,   926480k used,    93380k free,    24008k buffers
Swap:  2097148k total,   426756k used,  1670392k free,   206336k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND  
14276 apache    20   0  455m  25m 4808 R  4.7  2.6   0:01.80 httpd     
19065 mysql     20   0 1692m 390m 5880 S  1.0 39.2   1220:25 mysqld    
    1 root      20   0 19356  372  200 S  0.0  0.0   0:07.10 init      
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthreadd  
    3 root      RT   0     0    0    0 S  0.0  0.0   0:04.93 migration/0          
    4 root      20   0     0    0    0 S  0.0  0.0   0:07.41 ksoftirqd/0          
    5 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 stopper/0 
    6 root      RT   0     0    0    0 S  0.0  0.0   0:13.24 watchdog/0
    7 root      RT   0     0    0    0 S  0.0  0.0   0:04.58 migration/1          
    8 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 stopper/1 
    9 root      20   0     0    0    0 S  0.0  0.0   0:07.55 ksoftirqd/1          
   10 root      RT   0     0    0    0 S  0.0  0.0   0:11.79 watchdog/1
   11 root      20   0     0    0    0 S  0.0  0.0  88:38.36 events/0  
   12 root      20   0     0    0    0 S  0.0  0.0  67:35.22 events/1  
   13 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events/0  
   14 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events/1  
   15 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_long/0        
   16 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_long/1        
   17 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_power_ef      
   18 root      20   0     0    0    0 S  0.0  0.0   0:00.00 events_power_ef      
   19 root      20   0     0    0    0 S  0.0  0.0   0:00.00 cgroup    
   20 root      20   0     0    0    0 S  0.0  0.0   0:00.00 khelper   
   21 root      20   0     0    0    0 S  0.0  0.0   0:00.00 netns     
   22 root      20   0     0    0    0 S  0.0  0.0   0:00.00 async/mgr 
   23 root      20   0     0    0    0 S  0.0  0.0   0:00.00 pm        
   24 root      20   0     0    0    0 S  0.0  0.0   0:30.08 sync_supers          
   25 root      20   0     0    0    0 S  0.0  0.0   0:33.74 bdi-default          
   26 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kintegrityd/0        
   27 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kintegrityd/1   
   ... (이하 생략) ...