Pseudo-Swap !!!

[Mr.Right]

Hi HP-UX Gurus,

Please help me out with Pseudo-Swap. What exactly is Pseudo-Swap and when and how to use Pseudo-Swap?

[Laurent Menase]

pseudo swap is just a counter which avoid to reserve true swap if there is enough memory available to contain the needed virtual memory.
It is reserved before reserving true swap.

[Mr.Right]

Is there any good Available for understanding of Pseudo-Swap???

[Torsten. · Accepted solution]

Do you create duplicated threads again?

Anyway, how about this:

http://docs.hp.com/en/5965-4641/ch01s09.html

[Laurent Menase]

http://docs.hp.com/en/939/KCParms/KCparam.SwapMemOn.html
http://docs.hp.com/en/B2355-90950/ch06s03.html
http://docs.hp.com/en/TKP-90202/ch08s01.html
http://docs.hp.com/en/B2355-90672/ch06s02.html
....

[Laurent Menase]

just an example
if you have 16GB of memory and need only 20GB of virtual address space.
then you only need 4GB of swap disk, if pseudo swap is enabled. Else you need 20GB of swap disk.

[Dennis Handly]

Since the man page says to always leave it on and the kernel parm was removed in 11.31 as useless, there is no real need to know about pseudo-swap except to make sure you have it on.
It is also the "memory" line in "swapinfo -tam".

[Jeeshan]

Hi

this thread will clarify the usage of pseudo swap

http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1211858510358+28353475&threadId=1041105