The global allocation limit limits the amount of memory that can be used by the system as a whole. The value is the maximum allocation limit in MB. Note:In a system that supports multitenant database containers, the global allocation limit configured at the system layer of the global.ini file is always effective regardless of any value configured at the database layer.
Parameter Name - global_allocation_limit
Default Value - A missing entry or a value of 0 results in the system using the default settings. The global allocation limit is calculated by default as follows: 90% of the first 64 GB of available physical memory on the host plus 97% of each further GB. Or, in the case of small physical memory, physical memory minus 1 GB.
About Parameter - The global_allocation_limit parameter is used to limit the amount of memory that can be used by the database. The value is the maximum allocation limit in MB. A missing entry or a value of 0 results in the system using the default settings. The global allocation limit is calculated by default as follows: 90% of the first 64 GB of available physical memory on the host plus 97% of each further GB. Or, in the case of small physical memory, physical memory minus 1 GB.
Change the Global Memory Allocation Limit -
The SAP HANA database preallocates a pool of memory from the operating system over time, up to a predefined global allocation limit. You can change the default global allocation limit in the global.ini configuration file.
Prerequisites - You have the system privilege INIFILE ADMIN.
Procedure :
1> In the Administration editor, choose the Configuration tab.
2> The configuration files that contain the configuration information for the system are displayed.
3> Expand the global.ini configuration file and then the memorymanager section.
4> In the context menu for the global_allocation_limit parameter, choose Change.
5> The Change Configuration Value dialog box appears.
6> Enter a value for the entire system and/or individual hosts.
7> If you enter only a value for the system, it is used for all hosts. For example, if you have 5 hosts and you set the limit to 5 GB, the database can use up to 5 GB on each host (25 GB in total). If you enter a value for a specific host, then for that host, the specific value is used and the system value is only used for all other hosts. This is relevant only for multiple-host (distributed) systems.
Parameter Name - global_allocation_limit
Default Value - A missing entry or a value of 0 results in the system using the default settings. The global allocation limit is calculated by default as follows: 90% of the first 64 GB of available physical memory on the host plus 97% of each further GB. Or, in the case of small physical memory, physical memory minus 1 GB.
About Parameter - The global_allocation_limit parameter is used to limit the amount of memory that can be used by the database. The value is the maximum allocation limit in MB. A missing entry or a value of 0 results in the system using the default settings. The global allocation limit is calculated by default as follows: 90% of the first 64 GB of available physical memory on the host plus 97% of each further GB. Or, in the case of small physical memory, physical memory minus 1 GB.
Change the Global Memory Allocation Limit -
The SAP HANA database preallocates a pool of memory from the operating system over time, up to a predefined global allocation limit. You can change the default global allocation limit in the global.ini configuration file.
Prerequisites - You have the system privilege INIFILE ADMIN.
Procedure :
1> In the Administration editor, choose the Configuration tab.
2> The configuration files that contain the configuration information for the system are displayed.
3> Expand the global.ini configuration file and then the memorymanager section.
4> In the context menu for the global_allocation_limit parameter, choose Change.
5> The Change Configuration Value dialog box appears.
6> Enter a value for the entire system and/or individual hosts.
7> If you enter only a value for the system, it is used for all hosts. For example, if you have 5 hosts and you set the limit to 5 GB, the database can use up to 5 GB on each host (25 GB in total). If you enter a value for a specific host, then for that host, the specific value is used and the system value is only used for all other hosts. This is relevant only for multiple-host (distributed) systems.
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