This section describes the Oracle, PostgreSQL and SAP HANA related properties that you can set.

Derby

These following properties are applicable for the Derby database.

Property Description

derby.restore.path

Default value: "MZ_HOME/dbrestore"

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: `900` The number of seconds to wait for a free connection if the pool has reached max-connections used.
oracle.pool.inactivitytimeout	Default value: `300` 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: `-1` 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: `1` Minimum number of connections in the pool.
oracle.pool.propertycheckinterval	Default value: `300` Time (in seconds) to check for unused connections.
oracle.pool.refreshonsqlerror	Default value: `false` 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!

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. 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 with 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

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: 10

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 SYSTEM

Property	Description
max_connections	Default value: `100` 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: `32` Amount of memory (in MB) for caching data that should be dedicated to the PostgreSQL database.
effective_cache_size	Default value: `128` 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: `1` Memory (in MB) for performing in-memory complex sorts in the database.
random_page_cost	Default value: `4.0` 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.

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: 10

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.