RE: figuring out space
Date: Wed, 23 Sep 2015 11:04:39 -0400
Message-ID: <020e01d0f611$2d2af010$8780d030$_at_rsiz.com>
At the very least you are mixing free and used. (Your used% is about 92% if external redundancy).
Please re-read Stefan Knecht’s post about using usable.
mwf
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Zelli, Brian
Sent: Wednesday, September 23, 2015 7:53 AM
To: Kenny Payton; Stefan Knecht
Cc: tkiernan_at_pti-nps.com; oracle-l (oracle-l_at_freelists.org)
Subject: RE: figuring out space
Ok, I ran the script but the %Used doesn’t’ seem right.
I have 851968 Total mb, 781564 Used mb and the %used is saying 2% whereas I do it by a calculator and get 8%.....
Brian
From: Kenny Payton [mailto:k3nnyp_at_gmail.com]
Sent: Wednesday, September 23, 2015 7:20 AM
To: Stefan Knecht
Cc: tkiernan_at_pti-nps.com; Zelli, Brian; oracle-l (oracle-l_at_freelists.org)
Subject: Re: figuring out space
Sorry about that, I suppose I should have mentioned that we are 100% external redundancy.
Kenny
On Sep 23, 2015, at 4:21 AM, Stefan Knecht <knecht.stefan_at_gmail.com> wrote:
You shouldn't be using free_mb - you should always be using usable_file_mb. Otherwise, as soon as you're dealing with a diskgroup that's anything but EXTERNAL redundancy, you'll be looking at the wrong numbers.
Stefan
On Wed, Sep 23, 2015 at 7:40 AM, Kenny Payton <k3nnyp_at_gmail.com> wrote:
Here is the query I have wrapped with an asmdf shell script so I can just type asmdf and get a report that looks similar to df with total, used, free and %Used columns. You can wrap something like this with an alert based on percentages if you wish.
set pages 80 lines 90 head on feedback off tab off
col "Disk Group" format a25
col "Total(MB)" format 999999999999
col "Used(MB)" format 999999999999
col "Free(MB)" format 999999999999
col "%Used" format 999999999999
select dg.name <http://dg.name/> ||'/' "Disk Group", dg.total_mb "Total(MB)", (dg.total_mb - dg.free_mb) "Used(MB)", dg.free_mb "Free(MB)", round(((dg.total_mb - dg.free_mb)/dg.total_mb)*100) "%Used"
from v$asm_diskgroup dg
where dg.total_mb > 0
order by 2 desc
On Sep 22, 2015, at 11:34 AM, TJ Kiernan <tkiernan_at_pti-nps.com> wrote:
Usable and free can vary if you have ACFS volumes defined. Maybe there are other scenarios that will cause them to be different, but that’s at least an example. If I wanted to know how much space I have available in terms of a percentage, I’d go with usable/total.
HTH, T. J.
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Zelli, Brian Sent: Tuesday, September 22, 2015 10:22 AM To: oracle-l (oracle-l_at_freelists.org) Subject: figuring out space
So I’m using ASM and trying to create a report that alerts me to space issues. Using gv$asm_diskgroup
I have total space, usable space and free space. It looks like usable and free have the same value.
I’m trying to figure out a calculation that will alert me when there is only about 30% left. For the life of
me, I can’t see to get the calc right. Help!!!!!
Brian
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