What is global allocation limit in SAP HAN - SAP HANA?

SAP Term: global allocation limit

• Component: HAN

• Component Name: SAP HANA

• Description: SAP A The maximum amount of memory that the SAP A database can preallocate from the operating system. If the amount of memory used by the database nears the allocation limit, it may run out of memory unless it can free memory.

Smart SAP Assistant

• Key Concepts: 
  Global Allocation Limit (GAL) is a feature of SAP HANA that allows administrators to limit the amount of memory that can be used by a single user or application. This helps to ensure that no single user or application can consume too much memory, which can lead to performance issues. 
  
  How to use it: 
  To use GAL, administrators must first set the global allocation limit in the SAP HANA system. This is done by setting the parameter “global_allocation_limit” in the configuration file. Once this is done, administrators can then assign individual limits to each user or application. This is done by setting the parameter “user_allocation_limit” in the configuration file. 
  
  Tips & Tricks: 
  When setting the global allocation limit, it is important to consider the total amount of memory available in the system. If the global allocation limit is set too high, it could lead to performance issues due to insufficient memory. It is also important to consider the individual limits for each user or application. If these are set too low, it could lead to performance issues due to insufficient resources for that user or application. 
  
  Related Information: 
  For more information on GAL and how to configure it, please refer to the SAP HANA Administration Guide. Additionally, there are several online resources available that provide more detailed information on GAL and how to configure it.