Question : Solaris system Planning

Hi experts,

Need a quick solution for this.
I am a newbee to solaris
We are running sun server 4810 having around 18GB RAM and 12 sparc processor.its a production database server.
currently our management is planing to reduce 5 GB of memory from this system.
I have to give reports on that as how it will affect the existing system.
What all things are to be considered and planned so that I can put all these in my report.

here is the info if you require
the command which i ran -

prtmem -l

FRU Name        ID   Num      Size     Status       Size    Factor      Segment
Total memory:           17705 Megabytes-----------  ------  ----------  ---------
Kernel Memory:           1109 Megabytespass          256MB     4-way       0
Application:             8886 Megabytespass          512MB     4-way       1
Executable & libs:         89 Megabytespass          256MB     4-way       0
File Cache:              2089 Megabytespass          512MB     4-way       1
Free, file cache:        5342 Megabytespass          256MB     8-way       1
Free, free:               190 Megabytespass          256MB     8-way       1
/N0/SB0/P2/B0    2    0       512MB    pass          256MB     8-way       1


prtswap -l

Swap Reservations:
--------------------------------------------------------------------------
Total Virtual Swap Configured:                          16339MB =
RAM Swap Configured:                                        14293MB
Physical Swap Configured:                              +     2045MB

Total Virtual Swap Reserved Against:                     9488MB =
RAM Swap Reserved Against:                                   7442MB
Physical Swap Reserved Against:                        +     2045MB

Total Virtual Swap Unresv. & Avail. for Reservation:     6851MB =
Physical Swap Unresv. & Avail. for Reservations:                0MB
RAM Swap Unresv. & Avail. for Reservations:            +     6851MB


Swap Allocations: (Reserved and Phys pages allocated)
--------------------------------------------------------------------------
Total Virtual Swap Configured:                          16339MB
Total Virtual Swap Allocated Against:                    8889MB

Physical Swap Utilization: (pages swapped out)
--------------------------------------------------------------------------
Physical Swap Free (should not be zero!):                2045MB =
Physical Swap Configured:                                    2045MB
Physical Swap Used (pages swapped out):                -        0MB



Thanks,

junior73

Answer : Solaris system Planning

You need to do some performance statistics to find out the memory usage on
the system.

Make sure after your reduce the RAM the system will not use too much "swap".

Have a look at the following docs:

http://www.eandm.co.il/presentations/solaris/botteleneck.pdf
http://developers.sun.com/solaris/articles/prstat.html


Solaris Performance FAQ:

http://www.sun.com/sun-on-net/itworld/UIR010329cockcroftletters.html
http://sunsite.uakom.sk/sunworldonline/common/cockcroft.letters.html
http://www.itworld.com/Comp/3380/UIR010329cockcroftletters/