RE: dbms_resource_manager.calibrate_io, strange numbers
Date: Thu, 6 Oct 2011 00:56:25 +0200
Message-ID: <4814386347E41145AAE79139EAA3989817A8BC0B48_at_ws03-exch07.iconos.be>
It seems to depend on the number of disks and / or the latency.
When running with 1 disk and a latency of 20, the max_mbps is filled in (but the actual_latency is still 0):
START_TIME END_TIME MAX_IOPS MAX_MBPS MAX_PMBPS LATENCY NPD
------------------------------ ------------------------------ ---------- ---------- ---------- ---------- -----
05-OCT-11 04.43.02.766110 PM 05-OCT-11 04.57.38.945132 PM 13061 224 190 0 1
Elapsed: 00:00:00.00
When I run the calibration on a different 11.2.0.2 system, which is using ASM instead of dNFS
SQL> select * from dba_rsrc_io_calibrate;
START_TIME END_TIME MAX_IOPS MAX_MBPS MAX_PMBPS LATENCY NPD
------------------------------ ------------------------------ ---------- ---------- ---------- ---------- -----
05/10/11 18:21:51,323672 05/10/11 18:47:22,379584 10405 491 187 18 1
Both max_mbs and latency are given now.
The numbers of the test with latency 20 and 1 disk, are matching what I see when doing full table scan speed tests, so I will leave it for now.
Thanks to everyone who responded.
Kind regards,
Freek D'Hooge
Uptime
Oracle Database Administrator
email: freek.dhooge_at_uptime.be
tel +32(0)3 451 23 82
http://www.uptime.be
disclaimer: www.uptime.be/disclaimer
---
From: goran bogdanovic [mailto:goran00_at_gmail.com]
Sent: woensdag 5 oktober 2011 21:01
To: D'Hooge Freek
Cc: oracle-l_at_freelists.org
Subject: Re: dbms_resource_manager.calibrate_io, strange numbers
really strange results ... did you try to run orion and compare the results?
afaik, calibrate_io should be based on orion logic/implementation
regards,
goran
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Received on Wed Oct 05 2011 - 17:56:25 CDT