How swap used in HPUX ?


 
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Operating Systems HP-UX How swap used in HPUX ?
# 8  
Old 11-18-2011
Dear vbe / Moderator

kudos for the reply ,

Now

shall I ask my OS Team to

Check swapmem_on whether set to 1 ,

if yes, what should be the correct value

whether shall i ask them to make it 0.

later shall we observe the swap usage for few days,

instead of , the way you configured on 3 /dev/vg00/lvol2 .......


Thanks in advance Smilie
Regards
# 9  
Old 11-18-2011
Ask your admins if they cannot add at least an extra 8 GB RAM (Urgent...) but 12 GB would be preferable and 16 would be cool...
The best you can get out of your system is to stop it using swap!!
Swap means you have not enough memory to execute all you have loaded and so the system looses time by placing process not running at the time in swap device and when recalled again has to free memory by downloading yet more processes to be able to upload the one called etc...
# 10  
Old 11-21-2011
Hi vbe/Moderator and All

But I read that , the parameter swapmem_on is an obsolete parameter on

HP Unix 11.31 ,

So whether it should be Considered as 1 or 0 ?

in the Following link

system performance

Regards

---------- Post updated at 05:03 PM ---------- Previous update was at 02:29 PM ----------

Hi Vbe,

is your system 11.31 or lesser ?


what is the value of swapmem_on in your system ?

&

in your configuration

Physical RAM = 5329 MB
Swap Configured on 3 dev is around 2048 MB,

But PCT Used For dev are all 0% , why ?


At the Time, when you have taken the above output ,

whether system is not at all using the swap configured ?

==================================================================



Coming to my system, yes swapmem_on is by default in 11.31 so we cannot make it disabled (0)

so according you , system will start using the 70% of physical memory as swap


1) How to stop the system from using the 70% of physical Ram , in HP Unix 11.31

2) Is it possible to make the system utilize the Swap Configured on dev , Fully


or


3) My system , yes it is slow down ,

if only increasing the physical Ram is the solution For my system

Than , what is the use of swap configuration ?


I dont know , How to go about this ?

Thanks and Regards
# 11  
Old 11-21-2011
Swap is to allow a system to run more processes its memory can allow, by removing sleeping processes from memory (RAM) and move them to to virtual memory (disk) this process is called swapping. A well tuned machine should never or rarely swap or just a little.. You have 11 GB of permanent disk access on system disk...
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