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тАО01-28-2003 08:14 AM
тАО01-28-2003 08:14 AM
Solved! Go to Solution.
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тАО01-28-2003 08:31 AM
тАО01-28-2003 08:31 AM
Re: HPUX 11.0: Paging Usage High
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тАО01-28-2003 08:41 AM
тАО01-28-2003 08:41 AM
Re: HPUX 11.0: Paging Usage High
You need to make distinquish beyween page-outs and page-ins. Page-ins are normal and not a problem; even moderate page-out rates indicate memory pressure.
If you don't have Glance, execute vmstat and only pay attention to the 'po' column.
Typical problems are : 1) dbc_max_percent left at default 50%; on 11.0 systems in almost every case buffer caches > 400MB are useless.
2) SGA too big 3) too amny processes 4) not enough physical memory
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тАО01-28-2003 08:42 AM
тАО01-28-2003 08:42 AM
Re: HPUX 11.0: Paging Usage High
Are you referring to the swap usage as in 'swapinfo -tam', or are you looking at Glance and/or vmstat and seeing lots of page outs?
How much RAM do you have in your K580? How big is your swap space? How much shared memory is used by your Oracle database and what is the SGA size?
JP
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тАО01-28-2003 08:49 AM
тАО01-28-2003 08:49 AM
Re: HPUX 11.0: Paging Usage High
He also co-authored a 'performance cookbook' with Doug Grumann, which you can find at http://h21007.www2.hp.com/dspp/files/unprotected/devresource/Docs/TechPapers/UXPerfCookBook.pdf
If you have Glance installed, Doug Grumann wrote a paper on the GlancePlus Pak at http://devresource.hp.com/devresource/Docs/TechPapers/PakPerform.pdf
Having Page In's is not necessarily bad, how much free memory does your system have? And if we are going to get into that, how much total, what is dbc_max_pct and dbc_min_pct set to?
Hope it helps
John
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тАО01-28-2003 11:42 AM
тАО01-28-2003 11:42 AM
Re: HPUX 11.0: Paging Usage High
Set the time period in the attached script long enough so that things like archive log switches and such do not mess up your data.
It runs in background and does use a wee bit of system resources istelf.
This script is tested and a prod script in our shop.
P
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО01-28-2003 06:55 PM
тАО01-28-2003 06:55 PM
Solution1. stop running so many processes and user logins
2. Buy a lot more RAM.
Oracle needs several gigabytes of RAM to comfortably fit into memory and provide the fastest response times. Minimum RAM should be 4Gb, recommended RAM should be 6-8Gb for Oracle 64bit or multiple Oracle 32bit instances.
Bill Hassell, sysadmin
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тАО01-29-2003 12:49 PM
тАО01-29-2003 12:49 PM
Re: HPUX 11.0: Paging Usage High
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тАО01-29-2003 12:51 PM
тАО01-29-2003 12:51 PM
Re: HPUX 11.0: Paging Usage High
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тАО01-29-2003 01:35 PM
тАО01-29-2003 01:35 PM
Re: HPUX 11.0: Paging Usage High
Making your GlancePlus Pak perform
http://h21007.www2.hp.com/dspp/files/unprotected/PakPerform.pdf
Hope it helps,
Robert-Jan.