Re: [Junk released by Allow List] Interesting Disk UNIT 1 behavior

[Jim Oberholtzer <midrangel@xxxxxxxxxx>]

 I guess what catches me a little off guard is I would expect read 
activity, it's the write requests that have me a little confused.  I 
guess the OS overrides the stop allocation on the load source.

Interesting........

Jim Oberholtzer
CEO/Chief Technical Architect
Agile Technology Architects, LLC


On 10/7/2010 3:28 PM, Jerry Adams wrote:
> Larry,
>
> I'm not an expert like you and others, but, since the Load Source is on Drive 1, doesn't that mean that most of the system "stuff" including MI is there?  If so, wouldn't this account for the higher percentage?  If not, hmmmm here, too.
>
> Jerry C. Adams
> IBM System i Programmer/Analyst
> You don't need to be "straight" to fight and die for your country.  You just need to shoot straight. -Barry Goldwater, author of "Conscience of a Conservative" in a letter to the Washington Post on 10 June 1993.
> -- B&W Wholesale office: 615-995-7024 email: jerry@xxxxxxxxxxxxxxx 
> -----Original Message----- From: midrange-l-bounces@xxxxxxxxxxxx 
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of DrFranken Sent: 
> Thursday, October 07, 2010 2:31 PM To: Midrange Systems Technical 
> Discussion Subject: [Junk released by Allow List] Interesting Disk 
> UNIT 1 behavior Some time back I heard/read/was told that for best 
> performance the first disk unit in the system ASP (The Load Source) 
> should be flagged for End Allocation and user data removed from it 
> with STRASPBAL. So I did this on Frankie just to see if I could notice 
> anything. This has been this way for many months. Today I happened to 
> have WRKDSKSTS up and saw this: ================= Elapsed time: 
> 03:28:08 Size % I/O Request Read Write Read Write % Unit Type (M) Used 
> Rqs Size (K) Rqs Rqs (K) (K) Busy 1 6718 15355 18.4 116.4 4.0 2.3 
> 114.0 4.1 4.0 10 2 6718 13161 78.9 6.3 20.9 3.5 2.8 32.1 6.8 2 3 6718 
> 13161 78.8 6.4 20.7 3.6 2.8 32.0 6.1 2 4 6718 17548 82.6 37.7 6.8 2.7 
> 34.9 37.8 4.3 5 5 6718 15355 80.4 4.2 29.6 2.5 1.6 43.8 7.5 2 6 6718 
> 15355 80.4 4.6 26.9 2.8 1.8 40.2 6.8 1 7 6718 15355 80.3 19.5 9.5 2.5 
> 17.0 45.1 4.3 3 8 6718 13161 78.9 5.5 23.5 3.0 2.5 37.3 6.6 2 9 6718 
> 15355 80.5 4.8 25.9 2.8 1.9 39.1 7.0 2 10 6718 15355 80.5 4.7 26.3 2.9 
> 1.8 38.7 7.0 2 11 6718 15355 80.5 5.0 25.4 2.5 2.4 44.0 6.1 2 12 6718 
> 15355 80.4 5.4 23.5 2.7 2.6 40.3 5.8 2 13 6718 17548 83.0 4.5 26.0 2.6 
> 1.8 37.1 9.5 2 ... down through drive 45 ================= So DESPITE 
> this, drive 1 is STILL the busiest on the system. Clearly 10% busy is 
> in no way an issue but the max for any other drive is 5 with the 
> average probably about 3. Things that make you go Hmmmmmm. - Larry 
> "DrFranken" Bolhuis