Short text
Maximum size of the shared memory available for each process, in 256MB blocks
Parameter Description
SAP manages a large number of files in shared memory, such as EM, the PXA buffer, table buffers, and so on. You can specify the size, in 256MB blocks, of the shared memories made available by the OS to each work process using the parameter as4/MAXSHR64. The maximum value of this parameter is 4096 = 1TB. The default value of the OS is 256 = 64GB.
Application Area
All components that use shared memory, such as EM.
Parameter Unit
256MB
Default Value
OS: 256 = 64GB
SAP: $(em/initial_size_MB) / 256 + 100
Who is permitted to make changes?
Customer
Operating System Restrictions
Only applies to IBM i
Database System Restrictions
None
Are other parameters affected or dependent?
All parameters that related to the size of the shared memory to be used, such as em/initial_size_MB.
Values allowed
1 to 4096
