troubleshooting Question

/proc space in Solaris10

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Netsol-NOS asked on
Unix OS
7 Comments3 Solutions2144 ViewsLast Modified:
we are using Solaris 10 on sparc box.
as we know proc is a pseudo file system in RAM but if issue command
bash-3.00# du -sh /proc
  20G   /proc
then if we check
bash-3.00# du -sh /    
Output of df is
bash-3.00# df -kh
Filesystem             size   used  avail capacity  Mounted on
/dev/dsk/c1t0d0s0       12G    12G   5.7M   100%    /
/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                   1.7G   1.1M   1.7G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
                        12G    12G   5.7M   100%    /platform/sun4u-us3/lib/
                        12G    12G   5.7M   100%    /platform/sun4u-us3/lib/sparcv9/
fd                       0K     0K     0K     0%    /dev/fd
swap                   1.7G    64K   1.7G     1%    /tmp
swap                   1.7G    48K   1.7G     1%    /var/run
/dev/dsk/c1t0d0s3      9.6G   4.7G   4.9G    49%    /db
/dev/dsk/c1t1d0s1       22G    17G   4.8G    78%    /data
/dev/dsk/c1t1d0s0       12G   1.8G   9.6G    16%    /oas
/dev/dsk/c1t0d0s4      9.6G   391M   9.1G     5%    /export/home

question is why there is difference in both the commands about root(/).
why du -sh command shows that it is using 20GB.
how can i see the size of / partition.
how can we tune the partition to free up disk size.


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