Database Properties (4.2)
- Jenni Wallin
This section describes the Oracle, PostgreSQL and SAP HANA related properties that you can set.Â
Derby
These following properties are applicable for the Derby database.
 Property | Description |
|---|---|
derby.restore.path | Default value: Set this property to set the Derby restore directory. |
Oracle
These following properties are applicable for the Oracle database.
These settings are used by the Platform for the connection towards the Platform database and for ECs for connections towards 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 ECs for connections towards external databases.
More information about Oracle Advanced Security can be found in the Oracle Database Advanced Security Administrator's Guide.
Note!
Usage Engine only supports Oracle Advanced Security 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. Exampleoracle.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 with this parameter. Accepted values include, REJECTED, ACCEPTED, REQUESTED and REQUIRED. |
oracle.net.crypto_checksum_types_client | The data integrity algorithm to be used is determined with this parameter. |
PostgreSQL
These following properties are applicable for the PostgreSQL database.
These settings are used by the Platform for the connection towards the Platform database and for ECs for connections towards external databases.
 Property | Description |
|---|---|
postgresql.connectionpool.defaultQueryTimeout | Default value: 300 Sets the maximum allowed duration in ms of any statement. |
postgresql.connectionpool.maxlimit | Default value: Maximum number of connections in the pool for the PostgreSQL database. Should be set to no less than the sum of values of postgresql.connectionpool.maxlimit configured for Platform and database profiles connecting to this database. These settings are used by the Platform for the connection towards the Platform database. Can also be used for ECs connections towards external databases and it is set on Database profile level. |
The following settings are used by the PostgreSQL Database for the connection to  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 SYSTEMÂ Â 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
The following properties are applicable for the SAP HANA database.Â
These settings are used by the Platform for the connection towards the database, and by ECs for connections towards 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. |
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