Get swap space on Solaris

Hello
there are different opinions on how to get the swap space on Solaris.
some say: swap -s and the space= used + available
others say swap -l (donno how they get the swap size)
other say 'top' command
others say using format command (in print sub-command)
Could you please advise on how to get the swap size on a solaris machine?
thanks

mpfefer wrote:
Hello
there are different opinions on how to get the swap space on Solaris.That's because there is no single definition of 'swap'. So if you ask for 'swap space', it's going to be interpreted differently by different people.
some say: swap -s and the space= used + availableThis shows you the allocation of the VM space. (Most uses of 'swap' by Solaris commands equate it with total virtual memory).
others say swap -l (donno how they get the swap size)This shows you the allocation of all active swap files.
other say 'top' commandThat can show you both RAM usage and VM/swap usage.
others say using format command (in print sub-command)Format can show you disk partitioning information. Disk partitioning may or may not have any bearing on how you're using swap files. You'd need at least 'swap -l' information (and possibly other commands) to make comparisons. But then again, 'swap -l' is all you'd need in that case anyway.
Could you please advise on how to get the swap size on a solaris machine?What do you mean by 'swap size'?
Darren

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Hi all,
I am the developer, not the DBA, but actually should make some DBA-job.
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oracle@dbs:/etc# ulimit -a
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
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pipe size (512 bytes, -p) 10
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aggregate PGA target parameter         629145600 bytes
aggregate PGA auto target               39321600 bytes
global memory bound                    104857600 bytes
total PGA inuse                       4089538560 bytes
total PGA allocated                   4612293632 bytes
maximum PGA allocated                 4746773504 bytes
total freeable PGA memory              359464960 bytes
process count 183
max processes count                          198
PGA memory freed back to OS           1.8291E+12 bytes
total PGA used for auto workareas        7504896 bytes
maximum PGA used for auto workareas    108168192 bytes
total PGA used for manual workareas            0 bytes
maximum PGA used for manual workareas     542720 bytes
over allocation count                   13757980
bytes processed                       2.1787E+13 bytes
extra bytes read/written              3.3085E+11 bytes
cache hit percentage                        98.5 percent
recompute count (total)                 13774288
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2 from v$sesstat s, v$statname n
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9401696912Need your help.
Many thanks!

Check what is using the memory and if that is necessary.
1. can you safely shrink the SGA ? you would need to check the AWR reports, or recommended sizes.
2. can you safely shrink the PGA ? you would need to check the AWR reports, or recommended sizes)
3. can you reduce the number of processes ? (are there lots of idle processes ?)
4. can you tune sql to use less memory ?
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I'm running Oracle 11.2 on Solaris 10 on a couple of HP Proliant DL 360 servers.
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Server A
top: Memory: 72G phys mem, 30G free mem, 16G total swap, 16G free swap
swap -s:   total: 27249744k bytes allocated + 13873764k reserved = 41123508k used, 1000552k available
prstat:
NPROC USERNAME SWAP   RSS MEMORY      TIME CPU
   257 oracle     39G   38G    53% 222:11:52 5.6%
    31 root       57M   59M   0.1% 414:47:23 0.1%
     1 smmsp    1776K 7736K   0.0%   0:00:34 0.0%
     6 zabbix   4752K 4092K   0.0%   0:58:31 0.0%
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top: Memory: 72G phys mem, 9890M free mem, 16G total swap, 16G free swap
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   157 oracle     28G   28G    39% 15:38:41 0.4%
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     1 smmsp    1776K 5724K   0.0%   0:00:00 0.0%
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Server A
$ vmstat -S 5 5
kthr      memory            page            disk          faults      cpu
r b w   swap free si so pi po fr de sr s0 s1 s2 s5   in   sy   cs us sy id
0 0 0 1059868 30507176 0 0 0 0 0 0 2 7 -0 123 30 13742 25008 7264 5 2 93
0 0 0 1024076 30982140 0 0 0 0 0 0 0 23 0 0 122 4433 14793 6854 6 2 92
0 0 0 1030292 30987500 0 0 0 0 0 0 0 0 0 0 102 4055 15049 7014 8 1 91
0 0 0 1044484 30999572 0 0 0 0 0 0 0 0 0 0 129 5905 19196 8127 6 1 93
0 0 0 1028584 30987636 0 0 0 0 0 0 0 0 0 0 114 10611 19925 7259 6 3 90

974632 wrote:
Looks like we don't have 'free' on these Solaris boxes (only the man pages).
I'm guessing that free is for linux (since it works fine on my linux boxes).
$ whereis free
free: /usr/man/man3c/free.3cdarn!
Realize that SWAP is purely an OS facility; which is 100% external to Oracle.
The OS send little used or idle processes into SWAP when RAM is scarce resource.
The fact that SWAP is being used is not a Bad Thing, in and of itself.
as long as vmstat shows that BI+BO > SI+SO I would ignore the Chicken Little warnings.

Can I install Solaris 8 without Swap space?

Can I install Solaris 8 without swap space? or Can I install the swap space on a different hard drive?

Refer Solaris 8 installation guide manuals from this URL:
http://docs.sun.com:80/ab2/coll.214.7/@Ab2CollView?Ab2Lang=C&Ab2Enc=iso-8859-1
Thanks,
Senthilkumar
Developer Technical Support
http://www.sun.com/developers/support

Swap space - upgrading to solaris 8

Hi
I have Solaris 2.6, 3Gb RAM and
# swap -l
swapfile dev swaplo blocks free
/dev/dsk/c0t0d0s4 32,4 16 527024 378752.
# vmstat
procs memory page disk faults cpu
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0 0 0 22392 13240 10 379 282 191 219 0 5 0 0 0 8 1381 5898 4631 6 5 89
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Thanks
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If you are using the "Installation" cd with Solaris 8 then it requires a minimum of 512 to store the "installer" in swap so it can do the installation. If you forego the use of the Installer CD and start the Installation with Disk 1 of 2 then you don't have to worry about swap issues. The Advanced Installation Guide seems to indicate that you should use the WebStart Installer but it is not needed.
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i have written a program that uses very little memory but seems to use huge amounts of swap space in increments of 1.4GB. The initial install of the Solaris 9 only allocated 500MB of swap for 4GB of Memory. The swap space has now been increased to 16GB but the program seems to use more swap space.
The program uses an api to attach to up to 100 agents and (the peice i wrote) registers a callback to handle events from the agents, a small amount of memory is allacated to hold details of each agent but no more.
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are you sure you are release memory, what language are you using?
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