Percentage of swap space used is fix it's normal

[malki]

Hello
I have a stange situation in my aix system:
It's now 3 week that Ihave tha percentage of the swap space used value ixed on 1% it's normal ?
Befor I had this value varied between 1% and 57%
Can you please explain me this situation
Thinks

 

[bjverzal]

What happened 3-weeks ago ? Any maintenance ? Additional memory ? Is the application running on this server up ?

I'd start here.

Bill.

 

[malki]

So for you it's no normal..
I don't know because ther's another team how work in this system..
what that I'm sur ther's no addotional memry and the application still work in this server

 

[bjverzal]

Then I would not be concerned. However, if something should happen, be sure you make a mental note that the machine might have benn behaving differently.

Bill.

 

[malki]

For exemple what's parametres can I check to verify the swap in the AIX

 

[bjverzal]

There is no need to verify it.

lsps -a tells you how big each one is
lsps -s tells you the sum of all swap spaces

Bill.

 

[malki]

I have a 3Go of real memory and 2 Go of swap space
So I still asking whay tha value was fixed at 1%..?
I don't know we can for exemple to push the system to ognore the swaps action and using juste a real memory

 

[bjverzal]

There is no way to do that.

I suggest you take your mind off this and focus on other projects. I suspect that you are spending alot of time being concerned about a problem that does not exist.

Regards, Bill.

 

[PSD]

malki,

If you are worried run :

vmstat 5 5

Look at the memeory columns on the far left this shows you total memory and how much is free....is there is a lot free at busy periods then obviously you will not be doing much paging. 1% paging is a dream to most people so enjoy it...

Cheers
PSD
IBM Certified Specialist - AIX V4.3 Systems Support
IBM Certified Specialist - AIX V4 HACMP

 

[LHLTech]

If you really wanted the system to start paging, you could force the system to 'pretend' that it has less available real memory using the rmss command.

Usually you would use this command to test a particular program's performance at different real memory levels, but I suppose you could use it to force your system to start paging earlier, just to prove that it does. But why you would want to I don't know.

Bear in mind that before your system will start to use paging space, you've got to use up your available real memory first...

Just make sure that when you type lsps -a it shows 'yes' in the active column.

Regards,
LHLTech

IBM Certified Specialist - AIX System Support
Halfway through CATE exams!