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тАО06-26-2007 01:10 PM
тАО06-26-2007 01:10 PM
swapspace
It is a CSA question.
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тАО06-26-2007 01:56 PM
тАО06-26-2007 01:56 PM
Re: swapspace
The default maximum amount of swap space you can configure, for both device swap and file system swap combined, is approximately 512MB. The tunable system parameter maxswapchunks controls this maximum.
The parameter maxswapchunks (default value of 256) limits the number of swap space chunks. The default size of each chunk of swap space is 2MB.
For example, when the value of the parameter maxswapchunks is 256, the maximum configurable device swap space (maxswapchunks x swchunk x DEV_BSIZE) is:
Thanks & Regards
Reshma
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тАО06-27-2007 02:02 AM
тАО06-27-2007 02:02 AM
Re: swapspace
More details at:
http://docs.hp.com/en/TKP-90202/re38.html
[11.11 maxswapchunks man page]
but in short, 11.11 with no reconfiguration has a maximum swap space of 512Mb, raising maxswapchunks but not swchunk will get you up to 32Gb, raising both to their maxima gets you a maximum of 1Tb.
For 11.23 (really 11.22 and beyond if I recall correctly), maxswapchunks is gone. The kernel instead adjusts what it sized automatically, so you can effectively consider it to be up to the maximum (since the kernel will do that for you if needed), and the default unconfigured swap maximum is 32Gb, up to 1Tb by reconfiguring swchunk.
See:
http://docs.hp.com/en/B2355-60103/swchunk.5.html
For 11.31, maxswapchunks is still gone, but there's more range. The default value of swchunk allows 4Pb of swap (4096Tb). The absolute maximum (by raising swchunk) would be 128Pb. See:
http://docs.hp.com/en/B2355-60130/swchunk.5.html
[Or on an 11.23 or higher system, just man swchunk -- 11.11 has tunable man pages on the web, later releases shipped with them in Section 5.]
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тАО06-27-2007 02:21 AM
тАО06-27-2007 02:21 AM
Re: swapspace
I apply this role:
1,25 the amount of phisical memory
because swap device also serves as a dump area (used by savecore) when no other dump area is specifically designated.
Regards,
Fat
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тАО06-27-2007 02:23 AM
тАО06-27-2007 02:23 AM
Re: swapspace
sorry I understand mimimum.
see this doc to designing the size of swap allocation:
http://docs.hp.com/en/B2355-90672/ch06.html
Regards,
Fat
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тАО06-27-2007 07:52 PM
тАО06-27-2007 07:52 PM
Re: swapspace
default is 512mb...
but we can change the size by edit maxswapchunks=(size)
by KK
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тАО06-28-2007 08:12 AM
тАО06-28-2007 08:12 AM
Re: swapspace
-Srinivas