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тАО03-06-2002 11:50 PM
тАО03-06-2002 11:50 PM
Swapping VS Paging
Again with some queries,so please ...
- What is the actual diff between swapping & paging?
on hp unix 11.0, when I issued the command vmstat -s I got the following output,
3195 swap ins
3195 swap outs
71 pages swapped in
72 pages swapped out
37928404 total address trans. faults taken
16786895 page ins
91413 page outs
498372 pages paged in
141174 pages paged ou
Is 3195 above in os blocks/pages?
and one more thing, How to find out the os block size?
Thanks & Regards
Syed
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тАО03-07-2002 12:02 AM
тАО03-07-2002 12:02 AM
Re: Swapping VS Paging
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x917187dc4d7dd5118ff00090279cd0f9,00.html
To find out the blocksize ..
1) For JFS file system run ..(example)
# fstyp -v /dev/vg01/lvol2
Look for "f_bsize"
2) For HFS file system ..
# tunefs -v /dev/vg01/lvol2 | grep bsize
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тАО03-07-2002 12:05 AM
тАО03-07-2002 12:05 AM
Re: Swapping VS Paging
the difference between swapping and paging is the following:
swapping -->> outsourcing whole processes into
swapping areas, which are not used for a longer period when RAM- space is needed.
paging -->> taking single pages of actually 4KB size which are not used for a longer period and put them into the swapping areas.
All UNIX- processes reserve swap-space, which doesn't mean that swapping/paging is actually done.
Allways stay on the bright side of life!
Peter
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тАО03-07-2002 12:06 AM
тАО03-07-2002 12:06 AM
Re: Swapping VS Paging
hi syed.
please refer this link
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x771ccb60e503d6118ff40090279cd0f9,00.html
Vijeesh CTK
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тАО03-07-2002 12:16 AM
тАО03-07-2002 12:16 AM
Re: Swapping VS Paging
(Strangely) the f_frsize from fstyp -v gives the (logical) blocksize for a JFS file system. You van test this with creating an FS with the -b option. By the way the default blocksize is 1KB for file systems up to 8GB, 2 KB for FS 16 GB etc etc with a maximum of 8KB.
HtH,
Mark