查看操作系统块大小oracle建库一般设置数据库块大小8192K，一般是OS块大小的整数倍，要避免数据库块大小小于系统块大小的情况。1.在WINDOWS系统上，可以用命令fsutil来查看，测试如下：C:\Documents and Settings\administrator>fsutil fsinfo ntfsinfo c:
NTFS卷序列号: 0x72ccb5f2ccb5b129版本:
3.1区数量:
0x0000000008ff8235簇总数:
0x00000000011ff046可用簇:
0x0000000000547b73保留总数:
0x0000000000000050每个扇区字节数:
512每个簇字节数:
4096每个FileRecord段的字节数: 1024每个FileRecord段的簇数: 0
Mft有效数据长度:
0x0000000009cac000
Mft起始Lcn
:
0x00000000000c4df6
Mft2起始Lcn
:
0x00000000008ff823
Mft区域起始:
0x0000000001067920
Mft区域结尾:
0x000000000108ce60上面簇字节数既为块大小。2.在linux系统上，可以用命令tune2fs，测试如下[root@localhost test10g]# df
Filesystem
1K-blocks Used Available Use% Mounted on
/dev/sda2
8776068 7576504 753764 91% /
/dev/sda1
497829 16303 455824 4%
/boot
none
517300 0
517300 0% /dev/shm
/dev/sda5
1035660 96452 886600 10% /tmp
[root@localhost test10g]# tune2fs -l /dev/sda1|grep Block
Block
count:
514048
Block
size:
1024
Blocks per group: 8192
[root@localhost test10g]# tune2fs -l /dev/sda2|grep Block
Block
count:
2229018
Block
size:
4096
Blocks per group: 32768上面Block size即为块大小。
--查看共享内存页大小
root@rh6a_[/root]# getconf PAGESIZE
4096
--查看块大小
root@rh6a_[/root]# tune2fs -l /dev/sda1 |grep 'Block size'
Block size: 1024
3.在Solaris系统上，可以用命令fstyp，测试如下:
bash-2.05# fstyp -v /dev/rdsk/c0t2d0s0 |more
ufs
magic 11954 format dynamic time
Mon Nov 4 17:46:05 2002
sblkno 16 cblkno 24
iblkno 28
dblkno 408
sbsize 2048 cgsize 4096
cgoffset 160 cgmask 0xfffffff0
ncg 697 size
17827200 blocks 17553949
bsize 4096 shift 12
mask 0xfffff000
fsize 1024 shift 10
mask 0xfffffc00
frag 4 shift 2
fsbtodb 1
minfree 1% maxbpg 1024
optim time
maxcontig 256 rotdelay 0ms rps
120
csaddr 408 cssize 11264
shift 8 mask 0xffffff00
ntrak 10 nsect 320
spc 3200 ncyl
11142
cpg 16 bpg
6400 fpg 25600
ipg 3040
nindir 1024 inopb 32
nspf 2
nbfree 4388485 ndir 2
nifree 2118876 nffree 4
cgrotor 0 fmod 0
ronly 0 logbno 0上面sbsize即为块大小。
4.AIX
root@jnrac1_[/]# df
Filesystem 512-blocks Free
%Used Iused %Iused Mounted on
/dev/hd4 2097152 1676656
21% 10339 6% /
/dev/hd2 6291456 934376
86% 51593 33% /usr
……
5.HPUNIX
root@$HPRX2800::[/]#df -g
/home (/dev/vg00/lvol5 ) :
8192 file system
block size 8192
fragment size
16384 total blocks
15296 total free blocks
15208 allocated free blocks
3872 total i-nodes
3801 total free i-nodes
3801 allocated free i-nodes
1073741829 file system id vxfs file system type
0x10 flags
255 file system name length
/home file system specific string
)
