How much portion of RAM is allocated to Swap space? Post: 302372941

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Operating Systems Solaris How much portion of RAM is allocated to Swap space? Post 302372941 by ramnagaraj on Thursday 19th of November 2009 05:31:03 AM

11-19-2009

Registered User

How much portion of RAM is allocated to Swap space?

How swap is getting 12GB as its size as per the below output:

Code:

Filesystem size used avail capacity Mounted on
/dev/md/dsk/d0 7.9G 2.1G 5.7G 27% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 12G 1.2M 12G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object
sharefs 0K 0K 0K 0% /etc/dfs/sharetab
/platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap1.so.1
7.9G 2.1G 5.7G 27% /platform/sun4u-us3/lib/libc_psr.so.1
/platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
7.9G 2.1G 5.7G 27% /platform/sun4u-us3/lib/sparcv9/libc_psr.so.1
fd 0K 0K 0K 0% /dev/fd
/dev/md/dsk/d3 7.9G 386M 7.4G 5% /var
swap 512M 216K 512M 1% /tmp
swap 12G 40K 12G 1% /var/run
/dev/md/dsk/d6 30G 766M 29G 3% /u02
/dev/md/dsk/d2 9.9G 92M 9.7G 1% /u01
/dev/md/dsk/d7 12G 3.8G 7.9G 33% /u03
/dev/md/dsk/d8 30G 1.1G 28G 4% /u04
/dev/md/dsk/d40 290G 2.0G 285G 1% /appdata
/dev/md/dsk/d4 12G 1.4G 10G 13% /opt/ems
/dev/dsk/c1t0d0s7 7.9G 1.5G 6.3G 20% /export/home
/dev/lofi/1 1.8G 1.8G 0K 100% /cdrom
ems15:~# swap -l
swapfile dev swaplo blocks free
/dev/dsk/c1t0d0s1 32,1 16 16790384 16790384
ems15:~# swap -s
total: 1861848k bytes allocated 421304k reserved = 2283152k used, 12779832k available
ems15:~# prtconf -v | grep -i mem
Memory size: 8192 Megabytes

Queries:
• How swap size is populating it as “12GB”.
• If we see the swap –s output, total swap space is (2283152k used 12779832k available = 14.37 GB). Theoretically we know that swap space is sum of hard disk allocated for swap space during partition and few portion of real memory i.e. RAM. If that is the scenario, in the above system we are having 8GB real memory. My question is how much percentage of real memory is allocated for swap space. Is there any command to find that? Why swap is not showing this 14.37
GB as its size in df –h output rather its showing 12GB.

Rgrds,
Ram.

ramnagaraj

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LEARN ABOUT V7

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

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