ORA-16237: SGA specified for Logical Standby is too small
Cause: MAX_SGA must be at least 10 Megabytes for proper functioning of Logical Standby.
Action: Specify the value of MAX_SGA to be greater than or equal to 10Mb. Alternatively, increase the shared_pool_size/sga_target so that 1/4 of it will amount to 10 Megabytes.