1.仅Cache inode和metadata
2.可以动态扩展
3.最高值受bufhwm参数控制,可以在/etc/system文件中定义更改
4.可以使用sysdef命令查看当前参数设置.
# sysdef
...................
* * Tunable Parameters * 41549824 maximum memory allowed in buffer cache (bufhwm) 30000 maximum number of processes (v.v_proc) 99 maximum global priority in sys class (MAXCLSYSPRI) 29995 maximum processes per user id (v.v_maxup) 30 auto update time limit in seconds (NAUTOUP) 25 page stealing low water mark (GPGSLO) 5 fsflush run rate (FSFLUSHR) 25 minimum resident memory for avoiding deadlock (MINARMEM) 25 minimum swapable memory for avoiding deadlock (MINASMEM) *
....................
|
5.缺省的buffer cache允许增长,直到占用2%的物理内存。
我们上面显示的就是缺省设置.可以使用prtconf来查看物理内存:
# prtconf|grep Mem
Memory size: 2048 Megabytes
|
2048Mx2% = 42,949,672.96 ~ 41,549,824 (bufhwm)
6.因为只有inode和metadata数据需要存储在buffer cache中,所以buffer cache必须要太大。
事实上,每个inode只需要300 bytes,一个2G的文件并发访问时只需要1M的buffer cache. (以UFS文件系统为例) 。
7.可以通过在/etc/system中设置参数,以减少buffer cache的内存分配。
比如设置为30M:
8.可以通过sar -b监控buffer cache的命中率
# sar -b
SunOS billing.eygle.com 5.8 Generic_108528-23 sun4u 12/15/04
00:00:00 bread/s lread/s %rcache bwrit/s lwrit/s %wcache pread/s pwrit/s
00:00:32 0 128 100 1 77 98 0 0
00:01:02 0 4 100 1 3 62 0 0
00:05:01 0 64 100 1 39 98 0 0
00:05:31 0 3 100 1 2 74 0 0
00:06:01 0 125 100 1 76 99 0 0
00:10:00 0 48 100 1 29 98 0 0
00:10:30 0 124 100 1 76 99 0 0
00:11:00 0 3 100 1 2 74 0 0
00:15:00 0 63 100 1 39 98 0 0
00:15:30 0 116 100 1 75 99 0 0
00:16:00 0 13 100 1 2 58 0 0
00:20:00 0 66 100 1 39 97 0 0
00:20:30 0 4 100 1 2 67 0 0
00:21:00 0 126 100 1 76 99 0 0
00:25:00 0 51 100 1 30 98 0 0
00:25:30 0 125 100 1 75 99 0 0
00:26:00 0 5 100 1 2 72 0 0
00:30:00 0 64 100 1 39 98 0 0
00:30:30 0 4 100 1 2 63 0 0
00:31:00 0 126 100 1 75 99 0 0
00:35:00 0 64 100 1 39 98 0 0
00:35:30 0 4 100 1 2 63 0 0
00:36:00 0 13 100 1 2 70 0 0
00:40:00 0 64 100 1 39 98 0 0
00:40:30 0 125 100 1 75 99 0 0
00:41:00 0 5 100 1 2 69 0 0
00:45:00 0 65 100 1 39 98 0 0
00:45:30 0 125 100 1 75 99 0 0
00:46:00 0 5 100 1 3 69 0 0
00:50:00 0 65 100 1 39 98 0 0
00:50:30 0 5 100 1 2 69 0 0
00:51:00 0 127 100 1 76 99 0 0
00:55:00 0 65 100 1 39 98 0 0
00:55:30 0 5 100 1 2 68 0 0
00:56:00 0 127 100 1 76 99 0 0
01:00:00 0 51 100 1 30 97 0 0
01:00:30 0 128 100 1 77 98 0 0
01:01:00 0 6 100 1 3 78 0 0
01:05:00 0 67 100 1 40 98 0 0
01:05:30 0 14 100 1 3 72 0 0
01:06:00 0 120 100 1 77 99 0 0
01:10:00 0 50 100 1 30 98 0 0
01:10:30 0 126 100 1 76 99 0 0
01:11:00 0 5 100 1 2 70 0 0
01:15:00 0 65 100 1 39 98 0 0
01:15:30 0 4 100 1 2 67 0 0
01:16:00 0 127 100 1 76 99 0 0
01:20:00 0 67 100 1 39 98 0 0
01:20:31 0 5 100 1 2 73 0 0
01:21:00 0 14 100 1 2 72 0 0
01:25:00 0 64 100 1 39 98 0 0
01:25:30 0 126 100 1 76 99 0 0
01:26:00 0 5 100 1 2 69 0 0
01:30:00 0 65 100 1 39 98 0 0
01:30:30 0 14 100 1 2 68 0 0
01:31:00 0 118 100 1 75 99 0 0
01:35:00 0 65 100 1 39 98 0 0
01:35:30 0 6 100 1 3 69 0 0
01:36:00 0 128 100 1 76 99 0 0
01:40:01 0 51 100 1 30 98 0 0
01:40:31 0 118 100 1 76 99 0 0
01:41:01 0 6 100 1 3 79 0 0
01:45:00 0 66 100 1 39 98 0 0
01:45:30 0 126 100 1 76 99 0 0
01:46:00 0 5 100 1 2 71 0 0
01:50:00 0 66 100 1 39 98 0 0
01:50:30 0 5 100 1 2 75 0 0
01:51:00 0 129 100 1 77 99 0 0
01:55:00 0 66 100 1 39 98 0 0
01:55:30 0 5 100 1 2 73 0 0
01:56:00 0 128 100 1 76 99 0 0
02:00:01 0 51 100 1 30 98 0 0
02:00:31 0 129 100 1 77 98 0 0
02:01:01 0 8 100 1 2 74 0 0
02:05:00 0 64 100 1 39 98 0 0
02:05:30 0 124 100 1 74 99 0 0
02:06:00 0 4 100 1 1 33 0 0
02:10:00 0 63 100 1 38 98 0 0
02:10:30 0 3 100 1 1 50 0 0
02:11:00 0 125 100 1 75 99 0 0
02:15:00 0 63 100 1 38 98 0 0
02:15:30 0 3 100 1 1 44 0 0
02:16:00 0 125 100 1 74 99 0 0
02:20:00 0 48 100 1 29 98 0 0
02:20:30 0 125 100 1 75 99 0 0
02:21:00 0 3 100 0 1 50 0 0
02:25:00 0 63 100 1 38 98 0 0
02:25:30 0 125 100 1 75 99 0 0
02:26:00 0 3 100 1 1 44 0 0
02:30:00 0 63 100 1 38 98 0 0
02:30:30 0 152 100 5 47 89 0 0
02:31:00 0 124 100 1 75 99 0 0
02:35:00 0 63 100 1 38 98 0 0
02:35:30 0 3 100 1 1 49 0 0
02:36:00 0 125 100 1 75 99 0 0
02:40:00 0 48 100 1 29 98 0 0
02:40:30 0 124 100 1 75 99 0 0
02:41:00 0 4 100 1 1 56 0 0
02:45:00 0 63 100 1 38 98 0 0
02:45:30 0 124 100 1 75 99 0 0
02:46:00 0 3 100 1 1 53 0 0
02:50:00 0 63 100 1 38 98 0 0
02:50:30 0 3 100 1 1 49 0 0
02:51:00 0 124 100 1 75 99 0 0
02:55:00 0 58 100 1 36 98 0 0
02:55:30 0 40 100 1 19 96 0 0
02:56:00 0 3 100 1 1 61 0 0
03:00:00 0 63 100 1 38 98 0 0
03:00:30 0 124 100 1 74 99 0 0
03:01:00 0 2 100 0 0 17 0 0
03:05:00 0 62 100 0 37 99 0 0
03:05:30 0 50 100 1 40 97 0 0
03:06:00 0 115 100 1 74 99 0 0
03:10:00 0 62 100 0 37 99 0 0
03:10:30 0 2 100 1 1 24 0 0
03:11:00 0 124 100 1 74 99 0 0
03:15:01 0 47 100 1 28 98 0 0
03:15:31 0 123 100 1 74 99 0 0
03:16:01 0 4 100 0 1 24 0 0
03:20:00 0 62 100 0 37 99 0 0
03:20:30 0 2 100 0 0 20 0 0
03:21:00 0 124 100 1 74 99 0 0
03:25:00 0 62 100 0 37 99 0 0
03:25:30 0 2 100 0 1 19 0 0
03:26:00 0 11 100 0 1 39 0 0
03:30:00 0 61 100 0 37 99 0 0
03:30:30 0 123 100 1 74 99 0 0
03:31:00 0 2 100 0 0 17 0 0
03:35:00 0 62 100 0 37 99 0 0
03:35:30 0 2 100 1 1 20 0 0
03:36:00 0 123 100 1 74 99 0 0
03:40:00 0 62 100 0 37 99 0 0
03:40:30 0 2 100 1 1 20 0 0
03:41:00 0 124 100 1 74 99 0 0
03:45:00 0 46 100 0 28 99 0 0
03:45:30 0 123 100 1 74 99 0 0
03:46:00 0 3 100 0 0 17 0 0
03:50:00 0 62 100 0 37 99 0 0
03:50:30 0 123 100 1 74 99 0 0
03:51:00 0 2 100 0 1 25 0 0
03:55:00 0 62 100 0 37 99 0 0
03:55:30 0 2 100 0 1 25 0 0
03:56:00 0 124 100 1 74 99 0 0
04:00:00 0 47 100 0 28 98 0 0
04:00:30 0 124 100 1 75 99 0 0
04:01:00 0 2 100 0 0 25 0 0
04:05:00 0 62 100 0 37 99 0 0
04:05:30 0 123 100 1 74 99 0 0
04:06:00 0 2 100 0 1 25 0 0
04:10:01 0 63 100 0 37 99 0 0
04:10:31 0 2 100 0 1 17 0 0
04:11:01 0 123 100 1 74 99 0 0
04:15:00 0 62 100 0 37 99 0 0
04:15:30 0 2 100 0 1 19 0 0
04:16:00 0 124 100 1 74 99 0 0
04:20:00 0 46 100 0 28 98 0 0
04:20:30 0 123 100 1 74 99 0 0
04:21:00 0 2 100 0 0 17 0 0
04:25:00 0 62 100 0 37 99 0 0
04:25:30 0 123 100 1 74 99 0 0
04:26:00 0 2 100 0 0 17 0 0
04:30:01 0 62 100 0 37 99 0 0
04:30:31 0 2 100 0 0 20 0 0
04:31:01 0 124 100 1 74 99 0 0
04:35:00 0 62 100 0 37 99 0 0
04:35:30 0 2 100 1 1 24 0 0
04:36:00 0 124 100 0 74 99 0 0
04:40:00 0 46 100 0 28 99 0 0
04:40:30 0 123 100 1 74 99 0 0
04:41:00 0 3 100 0 1 19 0 0
04:45:00 0 62 100 0 37 99 0 0
04:45:30 0 124 100 1 74 99 0 0
04:46:00 0 2 100 0 1 19 0 0
04:50:00 0 62 100 0 37 99 0 0
04:50:30 0 2 100 0 1 18 0 0
04:51:00 0 124 100 1 74 99 0 0
04:55:00 0 62 100 0 37 99 0 0
04:55:30 0 2 100 1 1 17 0 0
04:56:00 0 124 100 1 74 99 0 0
05:00:00 0 47 100 0 28 99 0 0
05:00:30 0 125 100 1 75 99 0 0
05:01:00 0 2 100 0 0 31 0 0
05:05:00 0 62 100 0 37 99 0 0
05:05:30 0 124 100 1 74 99 0 0
05:06:00 0 2 100 0 0 17 0 0
05:10:00 0 62 100 0 37 99 0 0
05:10:30 0 2 100 1 1 20 0 0
05:11:00 0 124 100 1 74 99 0 0
05:15:00 0 62 100 0 37 99 0 0
05:15:30 0 2 100 0 0 20 0 0
05:16:00 0 124 100 1 74 99 0 0
05:20:00 0 47 100 0 28 99 0 0
05:20:30 0 123 100 1 74 99 0 0
05:21:00 0 3 100 0 0 21 0 0
05:25:00 0 62 100 0 37 99 0 0
05:25:30 0 124 100 1 74 99 0 0
05:26:00 0 2 100 0 0 17 0 0
05:30:00 0 62 100 0 37 99 0 0
05:30:30 0 2 100 1 1 26 0 0
05:31:00 0 124 100 1 74 99 0 0
05:35:00 0 62 100 0 37 99 0 0
05:35:30 0 2 100 0 1 21 0 0
05:36:00 0 124 100 1 74 99 0 0
05:40:00 0 62 100 0 37 99 0 0
05:40:30 0 2 100 0 0 21 0 0
05:41:00 0 124 100 0 74 100 0 0
05:45:00 0 47 100 0 28 99 0 0
05:45:30 0 124 100 1 74 99 0 0
05:46:01 0 2 100 0 0 31 0 0
05:50:00 0 62 100 0 37 99 0 0
05:50:30 0 2 100 0 0 20 0 0
05:51:00 0 124 100 1 74 99 0 0
05:55:00 0 62 100 0 37 99 0 0
05:55:30 0 2 100 0 1 19 0 0
05:56:00 0 125 100 1 74 99 0 0
06:00:00 0 47 100 0 28 99 0 0
06:00:30 0 124 100 1 74 99 0 0
06:01:00 0 2 100 0 0 14 0 0
06:05:01 0 62 100 0 37 99 0 0
06:05:31 0 123 100 1 74 99 0 0
06:06:01 0 3 100 0 0 15 0 0
06:10:00 0 62 100 0 37 99 0 0
06:10:30 0 3 100 1 1 27 0 0
06:11:00 0 124 100 1 74 99 0 0
06:15:00 0 62 100 0 37 99 0 0
06:15:30 0 2 100 1 1 23 0 0
06:16:00 0 124 100 1 74 99 0 0
06:20:00 0 47 100 0 28 99 0 0
06:20:30 0 124 100 1 74 99 0 0
06:21:00 0 2 100 0 0 31 0 0
06:25:01 0 62 100 0 37 99 0 0
06:25:31 0 124 100 1 74 99 0 0
06:26:01 0 3 100 0 0 31 0 0
06:30:00 0 62 100 0 37 99 0 0
06:30:30 0 3 100 1 1 21 0 0
06:31:00 0 124 100 1 74 99 0 0
06:35:00 0 62 100 0 37 99 0 0
06:35:30 0 2 100 0 0 20 0 0
06:36:00 0 125 100 1 74 99 0 0
06:40:00 0 62 100 0 37 99 0 0
06:40:30 0 2 100 0 1 19 0 0
06:41:00 0 125 100 1 74 99 0 0
06:45:00 0 47 100 0 28 99 0 0
06:45:30 0 124 100 1 74 99 0 0
06:46:00 0 2 100 0 0 17 0 0
06:50:00 0 62 100 0 37 99 0 0
06:50:30 0 124 100 1 74 99 0 0
06:51:00 0 2 100 0 0 17 0 0
06:55:00 0 62 100 0 37 99 0 0
06:55:30 0 2 100 1 1 23 0 0
06:56:00 0 124 100 1 74 99 0 0
07:00:00 0 47 100 0 28 99 0 0
07:00:30 0 125 100 1 74 99 0 0
07:01:00 0 2 100 0 0 17 0 0
07:05:00 0 62 100 0 37 99 0 0
07:05:30 0 123 100 1 74 99 0 0
07:06:00 0 3 100 0 1 31 0 0
07:10:00 0 62 100 0 37 99 0 0
07:10:30 0 2 100 0 0 21 0 0
07:11:00 0 125 100 1 74 99 0 0
07:15:00 0 62 100 0 37 99 0 0
07:15:30 0 2 100 0 0 20 0 0
07:16:00 0 125 100 1 74 99 0 0
07:20:00 0 62 100 0 37 99 0 0
07:20:30 0 2 100 0 1 17 0 0
07:21:00 0 124 100 1 74 99 0 0
07:25:00 0 47 100 0 28 99 0 0
07:25:30 0 124 100 1 74 99 0 0
07:26:00 0 2 100 0 0 18 0 0
07:30:00 0 62 100 0 37 99 0 0
07:30:30 0 2 100 0 1 21 0 0
07:31:00 0 124 100 1 74 99 0 0
07:35:00 0 62 100 0 37 99 0 0
07:35:30 0 2 100 1 1 20 0 0
07:36:00 0 124 100 1 74 99 0 0
07:40:00 0 48 100 0 28 99 0 0
07:40:30 0 115 100 1 74 99 0 0
07:41:00 0 2 100 0 0 18 0 0
07:45:00 0 62 100 0 37 99 0 0
07:45:30 0 124 100 1 74 99 0 0
07:46:00 0 2 100 0 0 21 0 0
07:50:00 0 62 100 0 37 99 0 0
07:50:30 0 98 100 1 64 99 0 0
07:51:00 0 28 100 1 11 94 0 0
07:55:00 0 62 100 0 37 99 0 0
07:55:30 0 2 100 0 1 17 0 0
07:56:00 0 124 100 0 74 99 0 0
08:00:01 0 62 100 0 37 99 0 0
08:00:31 0 3 100 1 1 20 0 0
08:01:01 0 125 100 1 74 99 0 0
08:05:00 0 47 100 0 28 99 0 0
08:05:30 0 124 100 1 74 99 0 0
08:06:00 0 2 100 0 0 15 0 0
08:10:00 0 62 100 0 37 99 0 0
08:10:30 0 124 100 1 74 99 0 0
08:11:00 0 2 100 0 0 15 0 0
08:15:00 0 62 100 0 37 99 0 0
08:15:30 0 2 100 0 1 21 0 0
08:16:00 0 124 100 1 74 99 0 0
08:20:01 0 62 100 0 37 99 0 0
08:20:31 0 2 100 0 1 18 0 0
08:21:01 0 125 100 1 74 99 0 0
08:25:00 0 47 100 0 28 99 0 0
08:25:30 0 124 100 1 74 99 0 0
08:26:00 0 2 100 0 0 23 0 0
08:30:00 0 62 100 0 37 99 0 0
08:30:30 0 126 100 1 76 99 0 0
08:31:00 0 2 100 0 1 12 0 0
08:35:00 0 62 100 0 37 99 0 0
08:35:30 0 2 100 1 1 24 0 0
08:36:00 0 125 100 1 74 99 0 0
08:40:00 0 47 100 0 28 98 0 0
08:40:30 0 124 100 1 74 99 0 0
08:41:00 0 2 100 0 0 31 0 0
08:45:00 0 62 100 0 37 99 0 0
08:45:30 0 124 100 1 74 99 0 0
08:46:00 0 2 100 0 0 31 0 0
08:50:00 0 62 100 0 37 99 0 0
08:50:30 0 2 100 0 1 21 0 0
08:51:00 0 124 100 1 74 99 0 0
08:55:00 0 47 100 0 28 99 0 0
08:55:30 0 124 100 1 74 99 0 0
08:56:00 0 2 100 0 0 18 0 0
09:00:00 0 62 100 0 37 99 0 0
09:00:30 0 124 100 1 74 99 0 0
09:01:00 0 3 100 0 1 53 0 0
09:05:00 0 62 100 1 37 99 0 0
09:05:30 0 2 100 0 1 19 0 0
09:06:00 0 124 100 1 74 99 0 0
09:10:00 0 62 100 0 37 99 0 0
09:10:30 0 2 100 0 1 25 0 0
09:11:00 0 124 100 1 74 99 0 0
09:15:01 0 47 100 0 28 99 0 0
09:15:31 0 123 100 1 74 99 0 0
09:16:01 0 3 100 0 0 20 0 0
09:20:00 0 62 100 0 37 99 0 0
09:20:30 0 123 100 1 74 99 0 0
09:21:00 0 3 100 0 1 19 0 0
09:25:00 0 62 100 1 37 98 0 0
09:25:30 0 95 100 1 2 43 0 0
09:26:00 0 264 100 1 76 98 0 0
09:30:00 0 208 100 2 30 94 0 0
09:30:30 0 297 100 3 77 96 0 0
09:31:00 0 179 100 2 3 54 0 0
09:35:00 0 222 100 2 39 96 0 0
09:35:30 0 331 100 2 75 98 0 0
09:36:00 0 209 100 2 4 51 0 0
09:40:00 0 276 100 2 71 97 0 0
09:40:30 0 2 100 0 1 18 0 0
09:41:00 0 124 100 1 74 99 0 0
09:45:00 0 62 100 0 37 99 0 0
09:45:30 0 2 100 1 1 15 0 0
09:46:00 0 11 100 0 0 31 0 0
09:50:00 0 61 100 0 37 99 0 0
09:50:30 0 123 100 1 74 99 0 0
09:51:00 0 2 100 0 0 17 0 0
09:55:00 0 62 100 0 37 99 0 0
09:55:30 0 2 100 0 1 25 0 0
09:56:00 0 11 100 0 0 31 0 0
10:00:00 0 126 100 1 42 98 0 0
10:00:31 0 178 100 2 77 98 0 0
10:01:01 0 6 100 0 1 17 0 0
10:05:00 0 1933 100 7 1382 100 0 0
10:05:30 0 11 100 1 1 23 0 0
10:06:00 0 116 100 1 74 99 0 0
10:10:00 0 62 100 0 37 99 0 0
10:10:30 0 2 100 0 1 17 0 0
10:11:00 0 124 100 1 74 99 0 0
10:15:00 0 48 100 0 28 98 0 0
10:15:30 0 2567 100 14 1342 99 13 0
10:16:00 0 6055 100 32 3045 99 0 0
10:20:01 0 1138 100 1 571 100 0 0
10:20:31 0 124 100 1 74 99 0 0
10:21:01 0 3 100 1 1 19 0 0
10:25:00 0 1978 100 1 922 100 0 0
10:25:30 0 2 100 1 1 15 0 0
10:26:00 0 144 100 1 74 99 0 0
10:30:01 1 2056 100 2 1366 100 0 0
10:30:31 0 191 100 2 77 97 0 0
10:31:01 0 75 100 1 1 19 0 0
10:35:00 0 245 100 2 39 96 0 0
10:35:30 0 149 100 1 3 48 0 0
10:36:00 0 404 100 3 78 96 0 0
10:40:00 0 1449 100 2 30 94 0 0
10:40:30 0 1199 100 3 77 96 0 0
10:41:00 0 1072 100 2 3 37 0 0
10:45:00 0 1461 100 2 39 95 0 0
10:45:30 0 1087 100 3 77 96 0 0
10:46:00 0 2530 100 2 3 30 0 0
10:50:00 0 698 100 2 39 96 0 0
10:50:30 0 1125 100 2 2 17 0 0
10:51:00 0 1410 100 3 78 96 0 0
10:55:00 0 798 100 2 30 95 0 0
10:55:30 0 323 100 3 76 96 0 0
10:56:00 0 130 100 2 3 40 0 0
11:00:00 0 223 100 2 39 95 0 0
11:00:30 0 290 100 3 76 96 0 0
11:01:00 0 126 100 1 2 21 0 0
11:05:00 0 217 100 2 39 96 0 0
11:05:30 0 133 100 2 3 35 0 0
11:06:00 0 318 100 2 76 97 0 0
11:10:00 0 200 100 2 31 94 0 0
11:10:30 0 322 100 3 78 96 0 0
11:11:00 0 155 100 2 4 63 0 0
11:15:00 0 231 100 2 40 95 0 0
11:15:30 0 336 100 4 79 95 0 0
11:16:00 0 180 100 1 3 70 0 0
11:20:00 0 245 100 2 40 95 0 0
11:20:30 0 157 100 3 4 39 0 0
11:21:00 0 309 100 2 76 97 0 0
11:25:01 0 236 100 2 40 95 0 0
11:25:31 0 83 100 2 4 42 0 0
11:26:01 0 5 100 0 1 19 0 0
11:30:00 0 62 100 0 37 99 0 0
11:30:30 0 124 100 1 74 99 0 0
11:31:00 0 2 100 0 0 17 0 0
11:35:00 0 63 100 0 37 99 0 0
11:35:30 0 4 100 1 1 23 0 0
11:36:00 0 126 100 1 74 99 0 0
11:40:00 0 130 100 1 51 99 0 0
11:40:30 0 295 100 1 74 99 0 0
11:41:00 0 1206 100 1 147 99 0 0
11:45:01 0 2933 100 1 463 100 0 0
11:45:31 0 4162 100 1 74 99 0 0
11:46:01 0 2220 100 0 1 33 0 0
11:50:00 0 858 100 1 37 99 0 0
11:50:30 0 3019 100 1 1 22 0 0
11:51:00 0 3575 100 1 74 99 0 0
11:55:00 0 1691 100 0 28 99 0 0
11:55:30 0 115 100 1 74 99 0 0
11:56:00 0 3 100 0 0 27 0 0
12:00:00 0 62 100 0 37 99 0 0
12:00:30 0 12 100 1 1 27 0 0
12:01:00 0 115 100 1 74 99 0 0
12:05:00 0 62 100 0 37 99 0 0
12:05:30 0 2 100 0 1 17 0 0
12:06:00 0 124 100 1 74 99 0 0
12:10:00 0 47 100 0 28 99 0 0
12:10:30 0 124 100 1 74 99 0 0
12:11:00 0 2 100 0 0 18 0 0
12:15:00 0 62 100 0 37 99 0 0
12:15:30 0 2 100 1 1 25 0 0
12:16:00 0 124 100 1 74 99 0 0
12:20:00 0 47 100 0 28 99 0 0
12:20:30 0 124 100 1 74 99 0 0
12:21:00 0 2 100 0 0 21 0 0
12:25:00 0 63 100 0 37 99 0 0
12:25:30 0 2 100 0 0 20 0 0
12:26:00 0 124 100 1 74 99 0 0
12:30:00 0 63 100 0 37 99 0 0
12:30:30 0 2 100 0 0 20 0 0
12:31:00 0 49 100 0 33 99 0 0
12:35:00 0 56 100 0 33 99 0 0
12:35:30 0 123 100 1 74 99 0 0
12:36:00 0 3 100 0 1 29 0 0
12:40:00 0 64 100 0 37 99 0 0
12:40:30 0 124 100 1 74 99 0 0
12:41:00 0 2 100 0 1 12 0 0
12:45:00 0 65 100 0 37 99 0 0
12:45:30 0 2 100 0 1 17 0 0
12:46:00 0 124 100 1 74 99 0 0
12:50:00 0 47 100 0 28 99 0 0
12:50:30 0 124 100 1 74 99 0 0
12:51:00 0 2 100 0 0 18 0 0
12:55:00 0 62 100 0 37 99 0 0
12:55:30 0 124 100 1 74 99 0 0
12:56:00 0 2 100 0 0 17 0 0
13:00:00 0 47 100 0 28 99 0 0
13:00:31 0 139 100 1 75 98 0 0
13:01:01 0 3 100 0 0 21 0 0
13:05:00 0 72 100 0 37 99 0 0
13:05:30 0 2 100 1 1 20 0 0
13:06:00 0 124 100 1 74 99 0 0
13:10:00 0 47 100 0 28 99 0 0
13:10:30 0 124 100 1 74 99 0 0
13:11:00 0 3 100 0 0 20 0 0
13:15:00 0 62 100 0 37 99 0 0
13:15:30 0 123 100 1 74 99 0 0
13:16:00 0 3 100 0 1 29 0 0
13:20:01 0 62 100 0 37 99 0 0
13:20:31 0 2 100 1 1 20 0 0
13:21:01 0 124 100 1 74 99 0 0
13:25:00 0 47 100 0 28 99 0 0
13:25:30 0 124 100 0 74 99 0 0
13:26:00 0 2 100 0 0 13 0 0
13:30:00 0 62 100 0 37 99 0 0
13:30:30 0 2 100 1 1 18 0 0
13:31:00 0 124 100 0 74 99 0 0
13:35:00 0 62 100 0 37 99 0 0
13:35:30 0 2 100 0 1 19 0 0
13:36:00 0 11 100 0 0 31 0 0
13:40:00 0 64 100 0 37 99 0 0
13:40:30 0 123 100 1 74 99 0 0
13:41:00 0 3 100 0 0 14 0 0
13:45:00 0 64 100 0 37 99 0 0
13:45:30 0 2 100 0 1 26 0 0
13:46:00 0 12 100 0 1 25 0 0
13:50:00 0 61 100 1 37 99 0 0
13:50:30 0 2 100 0 1 31 0 0
13:51:00 0 124 100 1 74 99 0 0
13:55:00 0 62 100 0 37 99 0 0
13:55:30 0 2 100 0 1 25 0 0
13:56:00 0 124 100 1 74 99 0 0
14:00:00 0 47 100 0 28 99 0 0
14:00:30 0 143 100 1 74 99 0 0
14:01:00 0 3 100 0 1 40 0 0
14:05:00 0 48 100 0 28 98 0 0
14:05:30 0 376 100 1 74 99 0 0
14:06:00 0 285 100 0 1 35 0 0
14:10:00 0 208 100 0 37 99 0 0
14:10:30 0 196 100 0 1 33 0 0
14:11:00 0 116 100 1 74 99 0 0
14:15:00 0 62 100 0 37 99 0 0
14:15:30 0 2 100 0 1 17 0 0
14:16:00 0 124 100 0 74 99 0 0
14:20:00 0 47 100 0 28 98 0 0
14:20:30 0 125 100 1 74 99 0 0
14:21:00 0 5 100 0 1 19 0 0
14:25:00 0 69 100 1 37 99 0 0
14:25:30 0 299 100 0 1 28 0 0
14:26:00 0 159 100 1 74 99 0 0
14:30:00 0 62 100 0 37 99 0 0
14:30:30 0 2 100 0 1 25 0 0
14:31:00 0 124 100 1 74 99 0 0
14:35:00 0 47 100 0 28 99 0 0
14:35:30 0 128 100 1 74 99 0 0
14:36:01 0 10 100 1 1 12 0 0
14:40:00 0 63 100 1 38 98 0 0
14:40:30 0 31 100 1 1 27 0 0
14:41:00 0 124 100 1 74 99 0 0
14:45:00 0 47 100 0 28 99 0 0
14:45:30 0 124 100 1 74 99 0 0
14:46:00 0 25 100 1 1 22 0 0
14:50:00 0 63 100 0 37 99 0 0
14:50:30 0 2 100 1 1 13 0 0
14:51:00 0 125 100 1 74 99 0 0
14:55:01 0 48 100 1 28 98 0 0
14:55:31 0 123 100 1 74 99 0 0
14:56:01 0 2 100 0 0 27 0 0
15:00:00 0 62 100 0 37 99 0 0
15:00:30 0 7 100 1 1 25 0 0
15:01:00 0 125 100 1 75 99 0 0
Average 0 160 100 1 58 99 0 0
|
sar的man page说明:
OPTIONS
The following options modify the subsets of information
reported by sar.
-a Report use of file access system routines: iget/s,
namei/s, dirblk/s
-A Report all data. Equivalent to -abcdgkmpqruvwy.
-b Report buffer activity:
bread/s, bwrit/s
transfers per second of data between system
buffers and disk or other block devices.
lread/s, lwrit/s
accesses of system buffers.
%rcache, %wcache
cache hit ratios, that is, (1-bread/lread) as a
percentage.
pread/s, pwrit/s
transfers using raw (physical) device mechanism.
-c Report system calls:
scall/s
system calls of all types.
sread/s, swrit/s, fork/s, exec/s
specific system calls.
rchar/s, wchar/s
characters transferred by read and write system
calls. No incoming or outgoing exec(2) and
fork(2) calls are reported.
本文作者:
eygle,Oracle技术关注者,来自中国最大的Oracle技术论坛itpub.
www.eygle.com是作者的个人站点.你可通过Guoqiang.Gai@gmail.com来联系作者.欢迎技术探讨交流以及链接交换.
原文出处:
http://www.eygle.com/unix/The.Buffer.Cache.Of.Solaris.htm