I suspect that any real performance gains will happen with the EC12 processor equipped with flash memory as a paging device.
Vacation Notice: None Tom Puddicombe Mainframe Performance & Capacity Planning CSC 31 Brookdale Rd, Meriden, CT 06450 ITIS | (860) 428-3252 | [email protected] | www.csc.com This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. From: Anthony Hirst <[email protected]> To: [email protected] Date: 05/02/2013 10:11 AM Subject: Re: Performance gains with LFAREA ? Sent by: IBM Mainframe Discussion List <[email protected]> I've rolled it out into 2 of our test LPARs and have been using the HIS 113 records to try and measure the improvement. Specifically looking at the percentage of TLB miss processor cycles. I haven't seen an improvement using that metric, going into production this month so stay tuned. On Thu, May 2, 2013 at 5:07 AM, Markus Haselbach < [email protected]> wrote: > Hello, > > we start using LFAREA (1M pages) with z/OS 1.13 and DB2 10 on z196. > From IBM I read: "Using large pages can improve performance for some > applications by reducing the overhead of dynamic address translation". > We wonder how to measure this performance improvement. What we're trying > now is measuring and comparing CPU usage/ SQL with and without 1M pages. > Does someone have experience with this performance improvement and can > anybody advice me on what should/could be measured? > > kind regards > Markus > > > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
