Re: Paging space question

From: Bill Verzal (Bill_Verzal@BCBSIL.COM)
Date: Tue Jul 23 2002 - 16:56:21 EDT


That sounds like more of a "performance" related issue, versus a "system
critical" issue...Yes ?

-----------------------------------------------------------------------------------------------------------

Bill Verzal
Technical Consultant
Forbes Technical Consulting
(312) 653-3684
bill_verzal@bcbsil.com
MailStop: 27.201C

                    Adams Kevin J
                    <kevin.adams@P To: aix-l@Princeton.EDU
                    HS.COM> cc:
                    Sent by: IBM Subject: Re: Paging space question
                    AIX Discussion
                    List
                    <aix-l@Princet
                    on.EDU>

                    07/23/2002
                    03:47 PM
                    Please respond
                    to IBM AIX
                    Discussion
                    List

According to the current "paging space tips" at
http://techsupport.services.ibm.com/server/aix.techTips the only size issue
was:

"Make each paging space logical volume roughly equal in size. If paging
spaces are of different sizes, and the smaller ones become full, paging
activity will no longer be spread across all of the physical volumes."

Kevin Adams

-----Original Message-----
From: Bill Verzal [mailto:Bill_Verzal@BCBSIL.COM]
Sent: Tuesday, July 23, 2002 1:10 PM
To: aix-l@Princeton.EDU
Subject: [aix-l] Paging space question

I am assisting a DBA with troubleshooting a system (SP node, AIX 4.3.3 ML
10). I wish to make a statement to management, but I want to confirm it
first...

Can anyone confirm the following statement for me (and provide resources) ?

"If you have a system with more than one paging space, and they happen to
be different sizes, the system will not use any of the larger paging
space(es) beyond the size of the smaller"

For example

System A has 3 paging spaces configured as follows:

     1024MB
     512MB
     2048MB

AIX will not use more than 512MB of ANY of the paging spaces.

Is this true ? I recall that it is (or was at one time).

Thanks!

----------------------------------------------------------------------------

-------------------------------

Bill Verzal
Technical Consultant
Forbes Technical Consulting
(312) 653-3684
bill_verzal@bcbsil.com
MailStop: 27.201C

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