LINUX突然很慢了 后来就重起了下 下面是SAR 如何查看SYSTEM为何占用那么高？
[oracle@surgegate2 oradata]$ sar
Linux 2.6.9-42.ELsmp (surgegate2) 01/30/2008
12:00:01 AM CPU %user %nice %system %iowait %idle
12:10:01 AM all 16.67 0.00 0.58 0.61 82.14
12:20:01 AM all 38.79 0.00 39.44 0.02 21.75
12:30:01 AM all 47.05 0.00 52.95 0.00 0.00
12:40:02 AM all 47.48 0.00 52.52 0.00 0.00
12:50:01 AM all 48.29 0.00 51.71 0.00 0.00
01:00:01 AM all 48.90 0.00 51.10 0.00 0.00
01:10:01 AM all 48.60 0.00 51.40 0.00 0.00
01:20:01 AM all 48.59 0.00 51.41 0.00 0.00
01:30:01 AM all 48.75 0.00 51.25 0.00 0.00
01:40:01 AM all 48.62 0.00 51.38 0.00 0.00
01:50:02 AM all 48.50 0.00 51.50 0.00 0.00
02:00:01 AM all 48.19 0.00 51.81 0.00 0.00
02:10:01 AM all 48.90 0.00 51.10 0.00 0.00
02:20:01 AM all 49.29 0.00 50.71 0.00 0.00
02:30:01 AM all 48.28 0.00 51.72 0.00 0.00
02:40:01 AM all 48.47 0.00 51.53 0.00 0.00
02:50:01 AM all 48.69 0.00 51.31 0.00 0.00
03:00:04 AM all 48.45 0.00 51.55 0.00 0.00
03:10:01 AM all 48.92 0.00 51.08 0.00 0.00
03:20:01 AM all 47.33 0.00 52.67 0.00 0.00
03:30:01 AM all 49.14 0.00 50.86 0.00 0.00
03:40:01 AM all 49.19 0.00 50.81 0.00 0.00
03:50:01 AM all 49.14 0.00 50.86 0.00 0.00
04:00:01 AM all 48.92 0.00 51.08 0.00 0.00
04:10:01 AM all 48.60 0.00 51.40 0.00 0.00
[root@surgegate1 log]# sar -q
Linux 2.6.9-42.ELsmp (surgegate1) 01/30/2008
12:00:01 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15
12:10:02 AM 2 300 1.44 1.57 1.13
12:20:01 AM 2 296 1.36 1.57 1.35
12:30:01 AM 2 295 1.73 1.70 1.52
12:40:01 AM 4 296 1.13 1.45 1.49
12:50:01 AM 5 293 1.10 1.25 1.36
01:00:01 AM 98 354 95.52 71.37 36.21
01:10:01 AM 108 357 105.33 97.30 66.50
01:20:01 AM 112 332 108.99 107.09 86.52
01:30:01 AM 115 332 111.91 110.48 97.99
01:40:01 AM 114 334 112.93 112.37 104.89
01:50:01 AM 116 332 112.99 112.89 108.70
02:00:01 AM 117 342 113.03 112.99 110.74
02:10:01 AM 139 421 132.37 125.51 117.69
02:20:01 AM 156 502 152.89 145.12 131.21
02:30:01 AM 179 578 172.96 165.14 147.79
02:40:01 AM 197 662 193.02 185.22 166.16
02:50:01 AM 218 738 213.23 205.44 185.35
03:00:01 AM 235 814 233.03 225.44 204.88
03:10:01 AM 238 812 234.98 233.45 219.06
03:20:01 AM 238 812 235.04 234.80 226.64
03:30:01 AM 236 814 235.03 234.97 230.58
03:40:01 AM 238 812 235.06 235.01 232.67
03:50:01 AM 236 814 235.00 235.01 233.78
04:00:01 AM 241 818 235.07 235.02 234.36
04:10:01 AM 260 912 255.56 248.83 241.21
04:20:01 AM 280 993 275.55 268.18 254.53
04:30:01 AM 300 1067 295.19 287.87 270.96
