SWAP Info

[Marvin L. Diaz]

Hi Guys,

I have encountered a HPUX system in which the swap is in a mounted file system.

Is there any bad implication of this?

Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 8388608 7479476 909132 89% 0 - 1 /dev/vg00/lvol2
localfs 20971520 0 20971520 0% 20971520 0 1 /swap/paging
reserve - 19618900 -19618900
memory 8386560 1874708 6511852 22%


when i do the "bdf" the /swap/paging is moun ted.

[TY 007]

Hello Marvin,

Best if able to use Device Swap such as /dev/vg00/lvol2.

If no choice, filesystem swap should be fine.

If there is enough disk space for additional Device Swap, do consider it :)

Thanks

[Marvin L. Diaz]

TY,

What i am asking that, is it okay that the swap is visible on the "bdf" command.

i know lvol2 swap. the server is running SAP

[whiteknight]

Mavin,

No issue. Make sure you have any entry in /etc/fstab, so that when you reboot next time it will be automatically mounted

WK

[Marvin L. Diaz]

what about the I/O impact?
i tried to get into that directory /swap.

i found out that there are files located into it.

is that ok?

many thanks

[TY 007]

Hello Marvin,

>> what about the I/O impact?

If possible, /swap/paging should not be located in Boot Disk or /dev/vg00

The impact depends whether Application requires heavy swapping :)

Thanks

[whiteknight]

Marvin,

filesystem swap will have high i/o impact than device swap.

We usually recommend customer use device swap

WK

[Marvin L. Diaz]

Hi WK,

Do have a document with regards to what you have mention?

Cheers

[whiteknight]

Hi Marvin,

Make sure you have valid HP support contract linked to itrc.

http://www2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=emr_na-c00904894-7

WK

[Marvin L. Diaz]

Hi WK,

I would appriciate if you can send me a copy for that. I cannot access the site you send. It need a maintenance aggrement login.

Cheers