2.6.8 Database Properties
- Jenni Wallin
- Former user (Deleted)
- Former user (Deleted)
- Former user (Deleted)
This section describes the Oracle, PostgreSQL, and SAP HANA-related properties that you can set for the system.
Derby Properties
The following properties are applicable to the Derby database.
| Property | Description |
|---|---|
derby.restore.path | Default value: Set this property to set the Derby restore directory. |
Oracle Properties
The following properties are applicable to the Oracle database.
These settings are used by the Platform for the connection to the Platform database and for EC/ECSAs for connections to external databases.
| Property | Description |
|---|---|
oracle.pool.connectionwaittimeout | Default value: The number of seconds to wait for a free connection if the pool has reached max-connections used. |
oracle.pool.inactivitytimeout | Default value: Time (in seconds) to cache an unused connection before closing it. Note! The property oracle.pool.minlimit overrides this property and should be set to 0 to ensure that all unused connections are closed. |
oracle.pool.maxlimit | Default value: Maximum number of connections in the pool. Should be set to no less than "3". A usual setting would be about 10 to 100. The default value "-1" means that the number of connections is unlimited. |
oracle.pool.minlimit | Default value: Minimum number of connections in the pool. |
oracle.pool.propertycheckinterval | Default value: Time (in seconds) to check for unused connections. |
oracle.pool.refreshonsqlerror | Default value: The Oracle connection pools should refresh all connections in case of an SQL error. If set to "false", no refresh is made. |
Oracle Advanced Security Support
The following properties are supported for Oracle 12.2, which includes support for Oracle Advanced Security. Set the properties below if you want to enable encryption for Platform for the connection towards the Platform database and for EC/ECSAs for connections towards external databases.
More information about Oracle Advanced Security can be found in the Oracle Database Advanced Security Administrator's Guide.
Note!
Oracle Advanced Security support for the system is only for Oracle 12.2.
Property | Description |
|---|---|
oracle.net.encryption_client | The level of security of the client that will connect to the Oracle database is determined with this parameter. Accepted values include, REJECTED, ACCEPTED, REQUESTED, and REQUIRED. Example oracle.net.encryption_client="REQUIRED" |
| oracle.net.encryption_types_client | The encryption algorithm to be used is determined with this parameter. |
| oracle.net.crypto_checksum_client | The level of security when it comes to data integrity for the connection with the Oracle database is determined by this parameter. Accepted values include, REJECTED, ACCEPTED, REQUESTED, and REQUIRED. Example oracle.net.crypto_checksum_client="REQUIRED" |
| oracle.net.crypto_checksum_types_client | The data integrity algorithm to be used is determined with this parameter. |
PostgreSQL Properties
The following properties are applicable to the PostgreSQL database.
These settings are used by the Platform for the connection to the Platform database and for EC/ECSAs for connections to external databases.
| Property | Description |
|---|---|
postgresql.connectionpool.defaultQueryTimeout | Default value: 300 Sets the maximum allowed duration (in milliseconds) of any statement. |
postgresql.connectionpool.maxlimit | Default value: Maximum number of connections in the pool. Should be set to no less than "3". A usual setting would be about 10 to 100. |
The following settings are used by the PostgreSQL Database for the connection to the system and are stored in the postgresql.conf file in the server that is hosting the PostgreSQL database.
These settings are updated from the Psql Terminal using the ALTER SYSTEM SQL command. Changes to the settings will require a restart of the PostgreSQL service.
$ psql postgres=# ALTER SYSTEM SET max_connections = 110; ALTER SYSTEM
| Property | Description |
|---|---|
| max_connections | Default value: Maximum number of connections in the pool for the PostgreSQL database. Should be set to no less than the value in postgresql.connectionpool.maxlimit. |
| shared_buffers | Default value: Amount of memory (in MB) for caching data that should be dedicated to the PostgreSQL database. |
| effective_cache_size | Default value: Amount of memory (in MB) for disk caching. The recommended effective size should be set to 1/2 of the total memory of the server. |
| work_mem | Default value: Memory (in MB) for performing in-memory complex sorts in the database. |
| random_page_cost | Default value: Multiplier value for determining the length of time it takes for the disk to seek a random disk page. |
SAP HANA Properties
The following properties are applicable to the SAP HANA database.
These settings are used by the Platform for the connection to the 
database, and by EC/ECSAs for connections to external databases.
| Property | Description |
|---|---|
saphana.connectionpool.maxlimit | Default value: This property specifies the maximum number of connections in the pool. It is recommended that the value is set to 3 or greater. A usual setting would be between 10 and 100. |