Author: Bill Woodger
Subject: Reply to: High CPU consumption Job using IAM files as input
Posted: Thu Dec 01, 2016 10:43 pm (GMT 5.5)
The listcat output you provided is not much use. What volumes things reside on is irrelevant to any diagnosis. If information about inserts, updates, deletes, including detail on the index, is useful (but not included).
What is the "pattern" for updates to the 90m file, the actual one you are showing? Are you sure you need 10% CA freespace and 10% CI fresspace across the entire file? From the creation date, it is "recent" - do you delete/define each run? If your random access is widely distributed, there's a lot of overhead with your large blocks. What buffers have you used for index and data (and what is recommended for this type of access in your IAM documentation)?
Subject: Reply to: High CPU consumption Job using IAM files as input
Posted: Thu Dec 01, 2016 10:43 pm (GMT 5.5)
The listcat output you provided is not much use. What volumes things reside on is irrelevant to any diagnosis. If information about inserts, updates, deletes, including detail on the index, is useful (but not included).
What is the "pattern" for updates to the 90m file, the actual one you are showing? Are you sure you need 10% CA freespace and 10% CI fresspace across the entire file? From the creation date, it is "recent" - do you delete/define each run? If your random access is widely distributed, there's a lot of overhead with your large blocks. What buffers have you used for index and data (and what is recommended for this type of access in your IAM documentation)?