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swapinfo

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himacs
Super Advisor

swapinfo

Hi Admins,

I found below output from swapinfor -atm.

reserve - 9289 -9289

What does it means?


regards,
himacs
10 REPLIES
Patrick Wallek
Honored Contributor

Re: swapinfo

# man swapinfo

reserve is the amount of space that has been reserved by processes. This is what COULD be needed if you start running short of physical memory.
Pete Randall
Outstanding Contributor

Re: swapinfo

Allow me to read the man page to you:

"reserve
Paging space on reserve. This is the amount of paging space that could be needed by processes that are currently running, but that has not yet been allocated from one of the above paging areas."


Pete

Pete
himacs
Super Advisor

Re: swapinfo

Hi,

Thanks for ur replay..

Actually my Q is , output shows available is -9289.What does it means? any serious memory issue?

regards
himacs
James R. Ferguson
Acclaimed Contributor

Re: swapinfo

Hi:

> Actually my Q is , output shows available is -9289. What does it means?

The number is reported as a negative value. Think of this as subtracting the reserved memory used from a starting value of zero (reserved).

> any serious memory issue?

That's not possible to intelligently comment until you post the whole output of 'swapinfo -tam'.

Regards!

...JRF...
Dennis Handly
Acclaimed Contributor

Re: swapinfo

>JRF: The number is reported as a negative value. Think of this as subtracting the reserved memory

Right. This value should be logically subtracted from the FREE value under dev.
vaishakh k
Advisor

Re: swapinfo

Dear Himacs,

The reserve space in swapinfo shows the memory pages . the - symbol is due to as substracting the reserved memory. This is not a serious memory issue.Check with 'swapinfo -tam' out put . First Read manual page for swapinfo.

Hope this help you in single extend.
Ganesan R
Honored Contributor

Re: swapinfo

Hi Himacs,

Read this to understand swapinfo.

ftp://hprc.external.hp.com/memory.htm#swapinfo_defined
Best wishes,

Ganesh.
Suraj K Sankari
Honored Contributor

Re: swapinfo

HI,
Can you post the full output of
#swapinfo -tam

Suraj
Taifur
Respected Contributor
Solution

Re: swapinfo

Hi Himacs

>>reserve - 9289 -9289

9289 which is the amount of paging space that could be needed by processes that are currently running, but that has not yet been allocated from one of the above paging areas.


swapinfo prints information about device and file system paging space. (Note: the term `swap' refers to an obsolete implementation of virtual memory; HP-UX actually implements virtual memory by way of paging rather than swapping. This command and others retain names derived from `swap' for historical reasons.)

reserve
Paging space on reserve. This is the amount of paging space that could be needed by processes that are currently running, but that has not yet been allocated from one of the above paging areas.

Check below link for details.

http://docs.hp.com/en/B2355-90692/swapinfo.1M.html

If it helps , pls assign point.

Rgds//
Taifur
Jestin John Chacko
Regular Advisor

Re: swapinfo

Dear,

By running
swapinfo -ta

you will get the total amount of swap space being used. If the total
percentage used is high, roughly 90% or greater, then you probably need
to add more swap space if its not so i think your system is working with adequate swap space.

But for "reserve" i think the information above given by the experts had cleared your doubts :)