Re: iostat - multiblock read count

From: hopehope_123 <hopehope_123_at_yahoo.com>
Date: 27 May 2005 04:38:10 -0700
Message-ID: <1117193890.351670.250050@o13g2000cwo.googlegroups.com>

Hi friends,

Fabrizio , thank you very much for your corrections. Here is more accurate results:

2. same server: redhat linux advanced server ia64 , ext3 file system ,

[oracle_at_tanidw1 tmp]$ time dd if=/dev/zero of=/oracle/stagetmp/tmp/test bs=4096k count=5
5+0 records in
5+0 records out

real    0m0.063s
user    0m0.000s
sys     0m0.063s

Device:  rrqm/s  wrqm/s   r/s    w/s        rsec/s  wsec/s    avgrq-sz
avgqu-sz   await    svctm  %util
sdl1       0.00    4678.00  0.00  456.00    0.00    41072.00    90.07
 91.11      199.79   0.89    41.60

41072.00 / 2=20536 kb. 20536/456 = 45kb. per read

4. sun solaris

device       r/s    w/s      kr/s   kw/s      wait actv  svc_t  %w  %b
sd81         0.0  105.0    0.0    20483.3  4.8   3.2   76.7  11     30

195KB. per write

I have logged a tar for the bug issue.

Kind Regards,
tolga Received on Fri May 27 2005 - 06:38:10 CDT