Hello CICS Community,

I am working to set CICS region MEMLIMIT.  I have reviewed related documentation - CICS facilities that use 64-bit storage and done some initial research and am planning to set our MEMLIMIT=10G.

If anyone has any advice or cautions I should consider, please share them.

Research I am doing leads me to think 10G should be OK in our environment.  For example, CEMT I DSA shows

Gcdsasize(1G)
Gsdsasize(0) 
Gudsasize(0) 

for regions I have checked.

Appreciate anyone willing to share their experience with MEMLIMIT settings for CICS.

Thank you,

Tracy

Hi Tracy in our environment we do not specify a memelimit value at CICS level, as it is defined in SMFLIMxx. So the value is specified by policy.

Our cics works with MEMLIMIT nolimit and i have the same as you if i check DSA with CEMT I DSA that is

Memlimit(Nolimit) 
Gcdsasize(1G)     
Gsdsasize(0)      
Gudsasize(1G)     

Hope this help 

Claudia

Hi

The MEMLIMIT default is 10G. If Liberty servers are not running in the CICS region this is normally enough MEMLIMIT storage for the CICS region.

The CEMT command shows that only 1G is being used for above the bar CICS DSA storage and that no applications has requested used key of shared storage above the bar from CICS. This leaves 9G for to satisfy non CICS DSA storage requests with should be more than enough.

Thank you all for sharing your insights regarding MEMLIMIT!!