From: Hunter, Mark (Mark.Hunter@ANHEUSER-BUSCH.COM)
Date: Wed Jan 14 2004 - 12:16:19 EST
Running AIX 4.3.3 and 5.2. Both have late allocation.
IBM's default of 20/80 just doesn't seem to work on any of our boxes with 4GB+
RAM.
Mark Hunter
-----Original Message-----
From: Bob.Kelley@BRINKSINC.COM [mailto:Bob.Kelley@BRINKSINC.COM]
Sent: Wednesday, January 14, 2004 10:52 AM
To: aix-l@Princeton.EDU
Subject: Re: Paging space on a fastT
Version of AIX?
Reason for this is with aix 5 you now have whats commonly referred to
defferred paging. This essentially is the allocation of paging space when
it's needed, rather than in previous versions of aix 4.3.2 and below I
believe where exe's would allocate paging space as large as their running
image even if it turned out they never used it. This is one of the reasons
Simon points out that its no longer necessary to adhere to vendors software
requirements for paging space in certain cases bc its really solution
dependent.
Bobby Kelley Jr.
972-877-5341
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We run SAP on Oracle.
We set minperm to 5% and maxperm to 20%. Helps alot.
Our SAP team wants 3x memory for paging also. We ignore this and give them
1x.
With minperm/maxperm set, they use very little paging space.
Mark Hunter
-----Original Message-----
From: Bob.Kelley@BRINKSINC.COM [mailto:Bob.Kelley@BRINKSINC.COM]
Sent: Wednesday, January 14, 2004 10:21 AM
To: aix-l@Princeton.EDU
Subject: Re: Paging space on a fastT
what version of aix are you running? check your vmtune settings and post
pls
Bobby Kelley Jr.
972-877-5341
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| | "Wilson, Jeff" |
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We are running the paging monster app "SAP on DB2". I have never seen an
app eat paging space like this one. If we bounce SAP we get it all back
but until we do that SAP keeps all the paging space and dose not release
it. As always the recommend 2 X physical memory but with the new SAP
installs they want 3 X physical memory which is ridicules but I have no
choice in the matter so I have to add it even if they don't need it.
Jeff Wilson
303-737-5399
-----Original Message-----
From: JOSEPH KREMBLAS [mailto:jkremblas@REDHEARTGIFTS.COM]
Sent: Wednesday, January 14, 2004 8:34 AM
To: aix-l@Princeton.EDU
Subject: Re: Paging space on a fastT
Jeff,
Before throwing more paging space at the system, have you ran
vmstat and iostat to see what the system is doing? Can you provide a
vmstat listing and iostat listing? Are you running Oracle? Any other
databases? Also, provide the output of vmtune and schedtune. The
group may be able to tell what's going on performance wise and make
some recommedations.
--joseph
-----Original Message-----
From: IBM AIX Discussion List [mailto:aix-l@Princeton.EDU] On Behalf
Of Wilson, Jeff
Sent: Wednesday, January 14, 2004 8:27 AM
To: aix-l@Princeton.EDU
Subject: Paging space on a fastT
I was wondering if anyone has had any experience putting paging space
on attached disks like a fastT 900. I am out of space on my internal
OS disks and need more paging space and was wondering if there are
any problems I should be aware of before I do this. Thanks for you
help.
Jeff Wilson
System Administrator
Great-West Life & Annuity Ins. Co.
Desk: (303) 737-5399
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