RAM utilization 95% for a while..system slow down..

Question

Hi gurus
we are using win2003 ECC 6.0 SQL database.
having RAM 12GB. some times servers RAM  utilization will be near to 95%. in TA st06 there is only lessthan 200 kb
of physical memory free.
and CPU idle is ok    70 to 95%.
but my dialog responce times are as follows:
*02.07.2009  15:20:13  TO 02.07.2009 *
*Task type  name     steps     Avg resp time     Avg Proc time     cpu time      db time     *     
DIALOG     1,118     2,605.30     1,750.80     112.8     335.8     0     43.1
Time 15:00 to 15:10                                   
DIALOG          835.8     460.5                    
Time 15:10 to 15:20                                   
DIALOG     3,270     1,439.50     953.4     100.1     171.7     0     22.1
Time 3:20 to 3:30                                   
DIALOG     251     1,738.10     1,154.20     86.3     182.6     0     15.3
Time 15:30 -15:40                                   
DIALOG     294     1,660.20     1,238.20     117.6     166.9     0     19.6
Time 15:40 to 15:50                                   
DIALOG     191     6,611.80     4,229.30     179.7     981.2     0     144.3
Time 15:50- 16:00                                   
DIALOG     378     1,862.70     1,274.80     89.7     231.4     0     27.2
Time 16:00 to 16:10                                   
DIALOG     511     1,985.40     1,387.10     115.7     177.5     0     17.4
Time 16:10 to 16:20                                   
DIALOG     652     233.6     156.5     60.2     32     0     1.7
Time 16:20 to 16:30                                   
DIALOG     179     395.8     156.9     67.7     54     0     10.5
Above i observed that avg processing is tooo high as compared to avg responce time.
during that above time period i observed that the RAM utilization is more...how can i know which process causing thiese  much RAM  utilization....if i go to windows taksmanager there is highest mem utililzation with disp+work round 200-300MB.
please let me know where i have to concentrate to overcome this issue which happens alternatively 2 or 3 days  a while.
Thank in advance.
Regards
Balaji

Answer 1

You can find out the tcodes which are consuming higer memory through the ST03 under Memory Use Statistics here you need to choose task type dialog, based on the info  you need to use tocde STAD and input the Tcodes which had highest consuming memory  you have got from ST03 and exectue it. The output gives you the user and work process  and memory consumed etc which will help you to drill down to issue further.
While using STAD  read interval should be taken care for 24 hrs you need to keyin like ths TIME 00:00:01 LENGTH 23:59:59
To seek the info on Rules for Memory Management under Windows and otther issue like Reduczing the Size of the Windows File Cache, Determining the Number of Work Processes and Overview of Parameters for Windows from the link:
http://help.sap.com/saphelp_erp2004/helpdata/en/02/962783538111d1891b0000e8322f96/frameset.htm
Thank you,
Shyam