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Regarding Upgrading RAM in AIX 6.1

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Operating Systems AIX Regarding Upgrading RAM in AIX 6.1
# 8  
Old 03-19-2014
May be your team did not performed a stress test thoroughly, you will put the system to its max limits during that test (before you go live).

I guess, the no of users after go-live crossed the actual stress test, you guys under sized the system.

If you say NO and your answer is you did the stress test pushing to max, then my immediate guess is there might be change in code in application, ask them. Why there was no problem before and then sudden spike.

To the best of my experience either one of those should be it.
This User Gave Thanks to ibmtech For This Post:
sumanmca2006
# 9  
Old 03-20-2014
Code:
$ svmon -P | grep -p Pid
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
15925256 java            466928     8595   173586   528345      Y     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
13697236 BIService       332451    13225   474539   566291      N     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
19595408 java            300374     8626   557791   647293      Y     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
18088138 java             42401     8459    67900    99438      Y     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
21233778 java             34438     8478   141277   170749      Y     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
 8061030 das              31752    13226    35314    85014      N     Y     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
11665488 topas            21195    13204     5346    46727      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
14024892 ksh              20920    13204     4992    46101      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
 7077994 ksh              20776    13204     5125    46100      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
14549230 sh               20772    13204     5107    46083      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
15073398 ksh              20772    13204     5126    46101      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
14352432 ksh              20772    13204     5128    46103      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
20840500 sh               20772    13204     5172    46148      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
13631528 grep             20769    13204     4992    46008      N     N     N
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
14221472 svmon            19808     8416     5489    32695      Y     N     N
$ topas
Exiting
$ vmstat
System Configuration: lcpu=4 mem=8192MB
kthr    memory              page              faults        cpu
----- ----------- ------------------------ ------------ -----------
 r  b   avm   fre  re  pi  po  fr   sr  cy  in   sy  cs us sy id wa
 2  2 3164764  3003   0  29  28  93  282   0 353 6306 873 14  2 82  1
$ vmstat
System Configuration: lcpu=4 mem=8192MB
kthr    memory              page              faults        cpu
----- ----------- ------------------------ ------------ -----------
 r  b   avm   fre  re  pi  po  fr   sr  cy  in   sy  cs us sy id wa
 2  2 3128583  9792   0  29  28  93  283   0 353 6306 874 14  2 82  1
$ topas

Last edited by zaxxon; 03-21-2014 at 07:11 AM.. Reason: code tags
# 10  
Old 03-21-2014
Ok, your system is definetly actively paging in and out to Paging Space. Also some processes like your java and BIService (Business Intelligence?) are paged out already.
That together with a DB2 on this box, is a bit much maybe for 8 GB.

I assume your box has the default settings - the output of vmo -F -L lru_file_repage -L minperm% -L maxperm% -L maxclient% -L maxpin% is missing.

So with this input it seems, you are simply far from having enough memory. If you are increasing to 40 GB, there will be most probably no paging anymore anyway.
Last edited by zaxxon; 03-21-2014 at 10:00 AM.. Reason: typo
# 11  
Old 03-24-2014
Code:
$ vmo -F -L lru_file_repage -L minperm% -L maxperm% -L maxclient% -L maxpin%
ksh: vmo: cannot execute

Moderator's Comments:
Mod Comment Please use code tags.
Last edited by zaxxon; 03-24-2014 at 10:18 AM.. Reason: code tags
# 12  
Old 03-24-2014
Make sure you are root when calling this command.

Start using code tags - you don't want to get banned by accumulating infractions for missing code tags.
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