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тАО04-17-2002 05:08 AM
тАО04-17-2002 05:08 AM
I have this scenario, an L2000 server with 2 36Gb disks. It is connect to a VA7100.
I must create a 40Gb Swap. The question is:
Is correct create 20Gb on primary disk and 20Gb on VA? VA have raid5 it's a problem for swap?
It's supported???
tnx to all
Solved! Go to Solution.
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тАО04-17-2002 05:19 AM
тАО04-17-2002 05:19 AM
SolutionYou are not going to be able to do this, but not for the reason you asked. The maximum swap space allowed is 34GB:
http://docs.hp.com/hpux/onlinedocs/os/KCparam.MaxSwapChunks.html
Regards!
...JRF...
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тАО04-17-2002 05:40 AM
тАО04-17-2002 05:40 AM
Re: swap area
It is possible to do that. I think JRF has pointed a littlebit old document. 34GB was the limit earlier. Now the system imposed maximum swap space limit is 1 terabytes ! (= 1.09 trillion bytes.
# sam -> kernel configuration -> configurable parameters -> select 'maxswapchunks' and press f1 for help.
There is no problem with defining the swap space in the disks and in the disk array. RIAD-5 will give redundancy too. You can define these primary and secondary swap space with SAM. It will adjust the kernel parameters too.
HTH,
Shiju
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тАО04-17-2002 06:15 AM
тАО04-17-2002 06:15 AM
Re: swap area
Thanks Shiju, I agree! I quoted for 11.0 as referenced, but had not looked fully at 11i documentation. So, depending on Domenico's environment, he may indeed exceed 34GB. In fact, a very good insight into swap space, including the parameters 'maxswapchunks' and 'swchunk', can be found in the 11i kernel documentation:
http://docs.hp.com/hpux/onlinedocs/TKP-90202/TKP-90202.html
Regards!
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тАО04-17-2002 06:22 AM
тАО04-17-2002 06:22 AM
Re: swap area
Bill Hassell, sysadmin
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тАО04-17-2002 06:32 AM
тАО04-17-2002 06:32 AM
Re: swap area
I have the same idea, but sap have asked me this and I don't know why.
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тАО04-17-2002 06:35 AM
тАО04-17-2002 06:35 AM
Re: swap area
I am glad that I could point out this =)). Infact I was trying to post the reply first, but could see your reference of 34GB. Then it took a while for me to check and clarify this limitation ( 1 terabytes ), as we all know you rarely make mistakes ! The limitation is for 11.0 as well as 11.i.
Domenic, Bill has a very good point here. I would suggest you to check the swap utilization first, then increase if needed.
HTH,
Shiju
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тАО04-17-2002 10:48 AM
тАО04-17-2002 10:48 AM
Re: swap area
I have heard about these crazy swap space sizes recommended by SAP as well.
I am not sure of teh reason for this, but I will be able to find out more when I am in my office tomorrow.
I believe it has to do with the number of instances you are running.
Did you have specific problems why they asked you to increase the swap space ?
If you like to know more, let us know !
Regards,
Clemens
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тАО04-17-2002 02:11 PM
тАО04-17-2002 02:11 PM
Re: swap area
The irony of it was, those boxes had enough RAM that they never swapped. It was just pre-allocating swap.