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Should 12G swap be good enough on a hpux11iv3 and 64G memory?

 
hpuxmagic
Advisor

Should 12G swap be good enough on a hpux11iv3 and 64G memory?

I know 12G space is a little bit of too small in theory for 64G memory on a RX4640&HPUX 11iv3 server.

However, the application running on the server would not use that much of memory at all, I'd say the memory utilization could be only about 15%, and the possiblity to swap out is very small.

 

I really don't have much physicall space, since I need to get this server running as soon as possible. I only have 2x146G disks.

 

So, under these circumstances, is 12G should be good enough?

 

Thanks for your input!

3 REPLIES
Dennis Handly
Acclaimed Contributor

Re: Should 12G swap be good enough on a 11.31 and 64G memory?

>under these circumstances, is 12G should be good enough?

 

Well, if you have 64 G of RAM, you may not need any swap at all.  :-)

Basically what does "swapinfo -tam" show when the application is running?

And do you plan to add more of a load later?

hpuxmagic
Advisor

Re: Should 12G swap be good enough on a 11.31 and 64G memory?

This is a new built server, and the application has not been installed on, so swapinfo could not tell much yet. Based on swapinfo -tam on the ohter server, with 8G memory, running on the same app, the memory util is about 70%, and swapinfo -tam is following:

 

swapinfo -tam
             Mb      Mb      Mb   PCT  START/      Mb
TYPE      AVAIL    USED    FREE  USED   LIMIT RESERVE  PRI  NAME
dev       12288      11   12277    0%       0       -    1  /dev/vg00/lvol2
reserve       -    3721   -3721
memory     7767    2926    4841   38%
total     20055    6658   13397   33%       -       0    -

 

 

 

Dennis Handly
Acclaimed Contributor

Re: Should 12G swap be good enough on a 11.31 and 64G memory?

>running on the same app, the memory util is about 70%, and swapinfo -tam is following:

 

It appears to be only using 6.6 G.  So 64 G should be plenty, unless you want to run even more applications.