1. CPU 사용률 (오늘)
sar
[root@zetawiki ~]# sar
Linux 2.6.32.59-0.7-xen (jmnote) 10/24/12 _x86_64_
00:00:01 CPU %user %nice %system %iowait %steal %idle
00:10:01 all 20.63 0.00 11.65 2.17 0.08 65.46
00:20:01 all 9.32 0.00 4.34 1.99 0.05 84.30
00:30:01 all 11.32 0.00 6.61 1.17 0.13 80.77
... (생략)
Average: all 10.28 0.00 6.03 2.03 0.12 81.53
→ 00시부터 현재까지 10분마다 CPU 사용률 측정한 기록을 보여준다.[1]
2. CPU 사용률 (날짜별)
sar -f /var/log/sa/sa날짜
root@zetawiki ~]# sar -f /var/log/sa/sa15
Linux 2.6.32.24-0.2-xen (jmnote) 01/15/13 _x86_64_
00:00:01 CPU %user %nice %system %iowait %steal %idle
00:10:01 all 0.20 0.00 0.13 0.14 0.02 99.51
00:20:01 all 0.18 0.00 0.10 0.09 0.02 99.61
00:30:01 all 0.20 0.00 0.11 0.08 0.02 99.59
... (생략)
23:50:01 all 0.03 0.00 0.03 0.02 0.00 99.92
Average: all 0.03 0.00 0.04 0.64 0.00 99.29 [→ 15일의 시간대별 CPU사용률
3. 메모리 사용률 (오늘)
sar -r
[root@zetawiki ~]# sar -r
Linux 2.6.32-431.17.1.el6.x86_64 (jmnote) 12/16/2014 _x86_64_ (8 CPU)
12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit
12:10:01 AM 98368 1823252 94.88 139736 1106924 865680 14.31
12:20:01 AM 88392 1833228 95.40 139980 1109164 872664 14.42
... (생략)
07:30:01 AM 94708 1826912 95.07 162720 1083324 836068 13.82
07:40:01 AM 88120 1833500 95.41 162916 1085992 840896 13.90
Average: 84828 1818782 94.65 154463 1100276 830238 13.72
4. 메모리 사용률 (날짜별)
sar -r -f /var/log/sa/sa날짜
[root@zetawiki ~]# sar -r -f /var/log/sa/sa14
Linux 2.6.32-431.17.1.el6.x86_64 (jmnote) 12/14/2014 _x86_64_ (8 CPU)
12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit
12:10:01 AM 75956 1845664 96.05 111232 1186356 821400 13.58
12:20:01 AM 88780 1832840 95.38 111636 1173244 820888 13.57
... (생략)
11:40:01 PM 244440 1677180 87.28 140936 995520 818468 13.53
11:50:01 PM 240612 1681008 87.48 141240 998560 815016 13.47
Average: 136637 1784983 92.89 130622 1085960 838863 13.86 5. 로드 에버리지
[root@zetawiki ~]# sar -q
Linux 2.6.32-431.17.1.el6.x86_64 (jmnote) 02/10/2015 _x86_64_ (8 CPU)
12:00:01 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15
12:10:01 AM 0 208 0.38 0.27 0.15
12:20:01 AM 0 208 0.10 0.19 0.17
... (생략)
11:30:01 AM 0 208 0.14 0.26 0.26
11:40:01 AM 0 206 0.67 0.36 0.29
Average: 0 204 0.24 0.22 0.19