This was not a cosolidation, Only new table datasets have gone to the new MOD-27 disks(no logs, no catalogs).
The disks in question have an IORATE of about 5 IO/sec with a response time of 20-25 ms. The CU is a new one - so there is not much else happening on it. I am going to look in to the SMS setting that Ron Hawkins mentioned. thanks Mike On Tue, Dec 29, 2009 at 3:27 PM, Clark, Kevin <kevin.cl...@bcbsde.com>wrote: > Mike, > > We have too have recently installed a USP with a string of Mod-27, I'm > curious. > > What type of DB2 Files have you allocated? Table(s), Log(s) or > Catalog(s)? > > With IOSQ at zero, is there other "Fairly Active" Disk on the same CU. > > I am thinking that DB2 TS Scans may be impacting you. > > > > Kevin > > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On > Behalf Of Mike Shorkend > Sent: Monday, December 28, 2009 1:58 PM > To: IBM-MAIN@bama.ua.edu > Subject: HDS/USP Model 27 DASD and DB2 > > Hello All, > We have started experimenting with MOD-27 disks on a USP600 box. > We have found that with DB2, response times have deteriorated > significantly. > We are seeing response times of more than 10ms on a fairly active disk. > Disconnect time accounts for about 90% of the time. Cache disk ratio has > gone down for these disks to less than 10%. > HYPERPAV is active - IOSQ time is zero. zHPF is not enabled. > > z/OS 1.9. DB2 V8. > > We have opened an issue with Hitachi. > Has anyone else experienced this in a similar configuration? > > Thanks > > Mike > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > > > This e-mail message and any attachments transmitted with it are > confidential and are intended solely for the use of its authorized > recipient(s). If you are not an intended or authorized recipient, you are > hereby notified that any disclosure, copying, distribution or taking any > action in reliance on the information contained in this e-mail is > prohibited. If you have received this message in error or are not authorized > to receive it, please immediately notify the sender and delete the original > message and all copies of it from your computer. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO > Search the archives at http://bama.ua.edu/archives/ibm-main.html > -- Mike Shorkend m...@shorkend.com www.shorkend.com Tel: +972524208743 Fax: +97239772196 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
