Backing Store

Backing Store - 15493995 11682398 3656658 77% /.lore/u92...

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Backing Store Every page in the address space is backed by a file in disk, called backing- store Memory Section Backing Store Text Executable File Data Executable File when page is not not modified. Swap space when page is modified BSS Swap Space Stack Swap Space Heap Swap Space
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Swap Space Swap space is a designated area in disk that is used by the VM system to store transient data. In general any section in memory that is not persistent and will go away when the process exits is stored in swap space. Examples: Stack, Heap, BSS, modified data etc.
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Swap Space lore 208 $ df -k Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t0d0s0 1032130 275238 705286 29% / /proc 0 0 0 0% /proc mnttab 0 0 0 0% /etc/mnttab fd 0 0 0 0% /dev/fd /dev/dsk/c0t0d0s4 2064277 1402102 600247 71% /var swap 204800 2544 202256 2% /tmp /dev/dsk/c0t2d0s6
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Unformatted text preview: 15493995 11682398 3656658 77% /.lore/u92 /dev/dsk/c0t3d0s6 12386458 10850090 1412504 89% /.lore/u96 /dev/dsk/c0t1d0s7 15483618 11855548 3473234 78% /.lore/u97 bors-2:/p8 12387148 8149611 4113666 67% /.bors-2/p8 bors-2:/p4 20647693 11001139 9440078 54% /.bors-2/p4 xinuserver:/u3 8744805 7433481 1223876 86% /.xinuserver/u3 galt:/home 5161990 2739404 2370967 54% /.galt/home xinuserver:/u57 15481270 4581987 10775435 30% /.xinuserver/u57 lucan:/p24 3024579 2317975 676359 78% /.lucan/p24 Swap Space lore 206 $ /usr/sbin/swap -s total: 971192k bytes allocated + 1851648k reserved = 2822840k used, 2063640k available lore 207 $ /usr/sbin/swap -l swapfile dev swaplo blocks free /dev/dsk/c0t0d0s1 32,1025 16 2097392 1993280 /dev/dsk/c0t1d0s1 32,1033 16 2097392 2001792...
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This note was uploaded on 01/30/2012 for the course CS 354 taught by Professor Staff during the Fall '08 term at Purdue.

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Backing Store - 15493995 11682398 3656658 77% /.lore/u92...

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