Regarding program buffer

hi sapgurus,
in st02 ,i checked that the hit ratio of the program buffer is 73%
in st06 my current swap size is 34,830,140 30,414,708 25,600,000
the parameter abap/buffersize has certain values
parmeter value 700000
unsubstited standard value-150000
substituted value -150000
comment
#old_value :550000
i want to increase the hit ratio up 99%
what is change i have to do,and which value i have to change and how much.
please it is bit urgent
the windows 64bit machine and the sap release 700
please do help to get result
regards
rahul

Based on what logic do you raise it to these values?
You have no idea as to the modules used within the system.
You have no idea as to the number of users on the system.
You have no idea as to the number of app servers.
You have no idea as to how load balancing is happening (SMLG).
You have no idea as to the amount of memory in the server.
Before changing anything we need to understand why we have a hit rate of only 73% in the first place, Then and only then do we take the most appropriate action, which may, or may not be changing the value stated.
This is from a app server thats part of a SAP system for 11,000 users on Z-OS
abap/heap_area_dia 10000000
abap/heaplimit 10000000
abap/heap_area_nondia 10000000
abap/buffersize 900000
rsdb/cua/buffersize 30000
sap/bufdir_entries 9000
zcsa/presentation_buffer_area 120000000
zcsa/table_buffer_area 280000000
zcsa/db_max_buftab 60000
My point is dont just change it, correct the problem! it doesnt need to be the bigest number you can think of or get away with. it needs to be balanced.
My hit ratio is 99.96 and i wager with 1000s more users.
 Buffer Hitratio Allocated Free space Dir. size Free directory Swaps
 [%] [kB] [kB] [%] Entries Entries [%]
Program 99.96 927,192 24,194 2.69 225,000 206,972 91.99 11,796
The hit ratio is of what has been provided by the buffer rather than by direct DB access. However the buffer could well have been paged out to disk millions of times and still indicate a 99.9% rate.
Ask yourself are you doing new things, are you doing them for the first time since a reboot?

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Check this link out:
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http://help.sap.com/saphelp_sm40/helpdata/en/c4/3a6f00505211d189550000e829fbbd/content.htm
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