Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Update in the order of Clustering Index, reduces CPU Time?

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2
View previous topic :: :: View next topic  
Author Message
rathinakarthik

New User


Joined: 25 Jul 2006
Posts: 24

PostPosted: Wed Mar 14, 2007 5:54 pm    Post subject: Update in the order of Clustering Index, reduces CPU Time?
Reply with quote

Hi,

We are having performance issues in our DB2 modules. We found that updation of columns of in a table is taking much CPU time. Currently the columns are updated in random fashion.
If the columns are updated in Clustering index order , whether the CPU time will be reduced?

Please advise

Thank you.
Back to top
View user's profile Send private message

kgumraj

Active User


Joined: 01 May 2006
Posts: 151
Location: Hyderabad

PostPosted: Wed Mar 14, 2007 6:33 pm    Post subject: Re: Update in the oreder of Clustering Index
Reply with quote

Hi,

You have the answer in your question. You are true CPU time will improve when you use clustering index.
Back to top
View user's profile Send private message
vini_srcna

Active User


Joined: 26 May 2005
Posts: 178
Location: Copenhagen, Denmark

PostPosted: Wed Mar 14, 2007 9:15 pm    Post subject:
Reply with quote

Quote:
If the columns are updated in Clustering index order , whether the CPU time will be reduced?


Obviously yes. It takes less time when you go for sequential access.
Back to top
View user's profile Send private message
ashok_uddaraju

New User


Joined: 21 Feb 2007
Posts: 72
Location: bangalore

PostPosted: Wed May 16, 2007 9:18 am    Post subject: Re: Update in the oreder of Clustering Index
Reply with quote

hi,
The main purpose of clustering index is to reduce CPU time
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2 All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Update table without cursor Ron Klop DB2 3 Wed Oct 11, 2017 1:06 pm
This topic is locked: you cannot edit posts or make replies. 00D3003B - time outs in DB2 when invo... chavinash2004 DB2 2 Mon Oct 09, 2017 4:39 pm
No new posts VSAM RLS Wait time blayek JCL & VSAM 2 Mon Oct 02, 2017 9:05 pm
No new posts Comparing 2 Files using Current time arunsoods SYNCSORT 9 Fri Sep 22, 2017 6:00 pm
No new posts Regarding time parameter shanthi gude JCL & VSAM 7 Mon Sep 04, 2017 2:31 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us