topic Re: Installing swapspace in Operating System - HP-UX

Installing swapspace

mehul_3 — Thu, 29 Dec 2005 01:12:02 GMT

Hi all
Following result is shown after executing swapinfo
# swapinfo -atm
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 6144 277 5867 5% 0 - 1 /dev/vg00/lvol2
reserve - 5867 -5867
memory 2336 2209 127 95%
total 8480 8353 127 99% - 0 -

and disk utilisation is as follows:
# bdf
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 1024000 98032 918784 10% /
/dev/vg00/lvol1 503736 84744 368616 19% /stand
/dev/vg00/lvol8 5120000 400824 4682376 8% /var
/dev/vg00/lvol7 3072000 1082296 1974176 35% /usr
/dev/vg03/lvol5 102400000 92355080 9966504 90% /u05
/dev/vg03/lvol4 20480000 3448 20156616 0% /u04
/dev/vg03/lvol3 51200000 24370952 26619456 48% /u03
/dev/vg03/lvol2 51200000 26093560 24910360 51% /u02
/dev/vg03/lvol1 51200000 27526848 23488208 54% /u01
/dev/vg00/lvol4 1024000 75376 941776 7% /tmp
/dev/vg01/lvol1 10240000 3754560 6282850 37% /oracle
/dev/vg00/lvol6 3072000 1220240 1837304 40% /opt
/dev/vg00/lvol5 2048000 132432 1900648 7% /home
/dev/vg01/lvol2 16384000 3504332 12478526 22% /arch

Could anybody tell a steps how to increase a swapspace from mentioned 6GB to 9GB.

Regards,
Mehul

Re: Installing swapspace

Arunvijai_4 — Thu, 29 Dec 2005 01:17:29 GMT

Hi Mehul,

There are many threads available for increaing swap, You can go through them,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=905832
(Read geoff's reply)

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=887946

http://www2.itrc.hp.com/service/james/search.do?todo=search&admit=-1335382922+1135836823837+28353475&searchtext=Increasing+swap+&from=forums&origin=0&submit.x=0&wpa=forums1.itrc.hp.com%3A80&submit.y=0&searchcategory=ALL&hpl=1&searchcriteria=allwords&rn=25&source=7000&presort=rank&chkServStor=on&esc=us.support.itrc.hp.com

-Arun

Re: Installing swapspace

Adisuria Wangsadinata_1 — Thu, 29 Dec 2005 01:27:26 GMT

Hi Mehul,

You can just add another 3GB swap space into your file system (can be on any VG, not always on VG00).

Check the url below (docID : KBAN00000218) about 'Configuring Device Swap' :

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000075322187

Hope this information can help you.

Cheers,
AW

Re: Installing swapspace

Muthukumar_5 — Thu, 29 Dec 2005 01:43:11 GMT

/dev/vg00/lvol2 is being as swap space in system.

You can increase that primary swap with the follwoing link as,

http://www2.itrc.hp.com/service/james/search.do?todo=search&searchtext=extending+swap+space&from=forums&origin=0&submit.x=0&wpa=forums1.itrc.hp.com%3A80&submit.y=0&searchcategory=ALL&hpl=1&searchcriteria=allwords&rn=25&source=7000&chkServStor=on&presort=rank&esc=support.itrc.hp.com&admit=-1335382922+1135838427784+28353475

If you want you can create secondary swap and use that space too.

-Muthu

Re: Installing swapspace

Steven E. Protter — Thu, 29 Dec 2005 02:03:25 GMT

Shalom Mehul,

Note that increasing swap beyond 9-12 GB on this system will be counter productive, pulling down performance.

If the system is still under stress after this change, which requires a reboot, the next step is to purchase more memory.

SEP

Re: Installing swapspace

Eric Antunes — Thu, 29 Dec 2005 04:45:07 GMT

Hi Mehul,

I agree with Steven. From your swapinfo output, you may need more physical memory than swap.

Best Regards,

Eric Antunes

Re: Installing swapspace

Tvs — Thu, 29 Dec 2005 04:57:13 GMT

hi.

from the swapinfo output ,,
memory 2336 2209 127 95%
the usage of the physical memory is 95%.
so to improve the performance . increase the physcial memory

regards

Tvs

Re: Installing swapspace

mehul_3 — Fri, 30 Dec 2005 01:25:48 GMT

Thanks for help to all.
To resolve out of memory issue, oracle recommends to inrease a swap space but as many guys suggests it would be counter effect and looking for another permanent solution.

Regards,
Mehul