Memory and swap usage ?

czezz · 09-02-2008, 12:33 PM

Is there any other way to display memory usage and swap than prstat -a (Solaris 10 SPARC)?
What I need to display is somethink like under Linux procinfo provide:

Code:

Memory:      Total        Used        Free      Shared     Buffers
Mem:        255460      243688       11772           0      111784
Swap:      1967920        2528     1965392

anything simillar ?

popowich · 09-02-2008, 01:53 PM

Hello,

You can use the vmstat command in Solaris to display memory and other usage statistics.

You can follow it with a number to have it continue running the command, for example vmstat 1 to update every second.

-Raymond

jlliagre · 09-02-2008, 03:22 PM

For RAM and swap statistics, here are some Solaris commands you might find useful:

Code:

echo '::memstat' | pfexec mdb -k
swap -l
kstat -n system_pages

czezz · 09-03-2008, 02:31 AM

Hey guys,
thanks for ur answares. My trys below:

vmstat does not provide sensible details (or im not sure how to read it)
The only thing im interested in vmstat is SWAP memory. No phisical memory usage in it

My swap is 24 Gb.
Here is what vmstat shows me:

Code:

 kthr      memory            page            disk          faults      cpu
 r b w   swap  free  re  mf pi po fr de sr m0 m1 m3 m4   in   sy   cs us sy id
 0 5 0 45746416 33384272 88 153 151 4 4 0 0 0  8 24  0 1439 17328 3918 23 2 75
 0 0 0 52386120 36746400 2 5 0  0  0  0  0  0  0  1  0  641 1010 1407 32  1 67
 0 0 0 52386224 36746448 0 0 0  2  2  0  0  0  0  1  0  664 1050 1405 35  1 65
 0 0 0 52386224 36746456 17 26 0 18 18 0 0  0  0  4  0  754 9092 1533 36  2 62
 0 0 0 52386224 36746472 33 78 0 0 0  0  0  6  0  1  0  765 14380 1443 34 1 65

52386120 - is not 24 Gigs

Another command that shows swap details:

Code:

# swap -l
swapfile             dev  swaplo blocks   free
/dev/dsk/c1t0d0s5   118,21     16 49170416 49170416

It provides datas in blocks... Im not sure how to count blocks to Megabytes but it indicate that all swap memory is free.

Another command

Code:

# echo '::memstat' | pfexec mdb -k
Page Summary                Pages                MB  %Tot
------------     ----------------  ----------------  ----
Kernel                     314332              2455    4%
Anon                      3164912             24725   38%
Exec and libs               23067               180    0%
Page cache                 135642              1059    2%
Free (cachelist)           138169              1079    2%
Free (freelist)           4607671             35997   55%

Total                     8383793             65498
Physical                  8229279             64291

Does MB column shows phisical RAM status ?
Page column is totally unreadable for me

jlliagre · 09-03-2008, 03:01 AM

Quote:

Originally Posted by czezz

vmstat does not provide sensible details (or im not sure how to read it)

The latter statement is correct.

Quote:

The only thing im interested in vmstat is SWAP memory. No phisical memory usage in it

The free columns shows how much of your RAM is free (here 35 GB, not bad).
The swap column shows how much virtual memory is free, 52 GB. That includes free swap space + free ram.
Run "swap -s" to get details about it.

Quote:

Another command that shows swap details:

Code:

# swap -l
swapfile             dev  swaplo blocks   free
/dev/dsk/c1t0d0s5   118,21     16 49170416 49170416

It provides datas in blocks... Im not sure how to count blocks to Megabytes but it indicate that all swap memory is free.

Blocks are 512 bytes lenght:
49170416*512 = 25175252992 bytes = 23 GB.

Quote:

Code:

echo '::memstat' | pfexec mdb -k

hang up terminal - need to cancel it with CTRL+C.

Be patient and wait for the command to complete. Run it as root and remove the pfexec command.

What about kstat output ?

czezz · 09-03-2008, 04:01 AM

Hey Jlliagre,
many thanks for ur description

Now, life goes easier ;]

Here is an output of kstat:

Code:

kstat -n system_pages
module: unix                            instance: 0
name:   system_pages                    class:    pages
        availrmem                       7377904
        crtime                          49.7678981
        desfree                         64291
        desscan                         25
        econtig                         59244544
        fastscan                        186468
        freemem                         4541192
        kernelbase                      16777216
        lotsfree                        128582
        minfree                         32145
        nalloc                          25598342
        nalloc_calls                    12161
        nfree                           24877420
        nfree_calls                     7348
        nscan                           0
        pagesfree                       4541192
        pageslocked                     851375
        pagestotal                      8229279
        physmem                         8383793
        pp_kernel                       472670
        slowscan                        100
        snaptime                        766666.1963154

Output of echo '::memstat' | pfexec mdb -k alrdy corrected in the 1st post

jlliagre · 09-03-2008, 04:51 AM

Quote:

Originally Posted by czezz

Code:

# echo '::memstat' | pfexec mdb -k
Page Summary                Pages                MB  %Tot
------------     ----------------  ----------------  ----
Kernel                     314332              2455    4%
Anon                      3164912             24725   38%
Exec and libs               23067               180    0%
Page cache                 135642              1059    2%
Free (cachelist)           138169              1079    2%
Free (freelist)           4607671             35997   55%

Total                     8383793             65498
Physical                  8229279             64291

Does MB column shows phisical RAM status ?

Yes.

Quote:

Page column is totally unreadable for me

The page size is 8kB on your system.