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Operating Systems Solaris Swap Space
# 1  
Old 03-02-2010
Swap Space
Could someone please explain how you know how much swap space you have on your system. See below:

Code:
# swap -s
total: 8225048k bytes allocated + 4863488k reserved = 13088536k used, 4008032k available

# swap -l
swapfile             dev  swaplo blocks   free
/dev/dsk/c3t0d0s1   32,25     16 4100912 4100912
/data/swap/swap2048m  -       16 4194288 4194288
 
#format
1       swap    wu       0 -   402        1.96GB    (403/0/0)     4100928
 
#df -h

swap                   3.8G   1.0M   3.8G     1%    /etc/svc/volatile
swap                   3.8G   144K   3.8G     1%    /tmp
swap                   3.8G    48K   3.8G     1%    /var/run


admin@sealyaus1 # swap -s
total: 8215744k bytes allocated + 4867656k reserved = 13083400k used, 4013088k available

total: 8215744k bytes allocated - the total amount of swap space, in units of 1024-byte blocks, that is currently allocated as disk-backed swap space.

4867656k reserved - the total amount of swap space, in units of 1024-byte blocks, that is not currently allocated but is claimed by memory for future use.

13083400k used - the total amount of swap space, in units of 1024-byte blocks, that is allocated plus reserved.

4013088k available - the total amount of swap space, in units of 1024-byte blocks that is currently available for future use (ie for reservation and allocation)

The total = 8215744k from swap -s command
using format = 1.96GB
df -h = 3.8GB

Does the total from the 2 swap spaces in the swap -l command equal the df -h value ie
1.96GB + 2048mb, if so where does the rest come from to get total 8215744k

Thanks
# 2  
Old 03-02-2010
swap displays differently
# 3  
Old 03-02-2010
Quote:
Originally Posted by jamba1
The total = 8215744k from swap -s command.
No this is the allocated value. The total is 13083400k, i.e. ~13 GB.
Quote:
Does the total from the 2 swap spaces in the swap -l command equal the df -h value ie: 1.96GB + 2048mb, if so where does the rest come from to get total 8215744k
You have ~4 GB of on disk swap space. The remaining virtual memory size is picked from you RAM. I guess you have 16 GB of RAM. 4 GB of swap space is possibly undersized.
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