System Settings Reference
This section provides reference information for each of the AnzoGraph Basic system configuration settings. For instructions on changing settings, see Changing System Settings.
|Note||AnzoGraph provides other Advanced configuration settings that are intended only for system administrators or users with an advanced level of knowledge about AnzoGraph or databases in general. See the configuration file,
|Setting||Description||Default Value (Type)|
|enable_persistence||Specifies whether to enable AnzoGraph's save data to disk option.||true (boolean)|
|enable_sparql_protocol||Specifies whether to enable the SPARQL HTTP protocol service. The sparql_protocol_port setting controls the port to use if this option is set to true.||true (boolean)|
|enable_ssl_protocol||Specifies whether to enable the secure SPARQL HTTPS service for SSL connections. The ssl_protocol_port setting controls the port to use.||true (boolean)|
|internal_directory||The directory where AnzoGraph should save internal database's operational cache files.||Not set (char)
The default directory for internal operational data is install_path/internal.
|max_memory||Specifies the amount of memory (in MB) that is available for AnzoGraph. The default is system-based; at startup, AnzoGraph determines the amount of RAM that is available and sets max_memory. In test environments where AnzoGraph may be co-located with other programs, you can set the max_memory value to put a limit on the amount of memory AnzoGraph can use. However, Cambridge Semantics recommends that you do not set max_memory unless instructed by Support.||System-based (int)|
|output_format||Specifies the default output format for AnzoGraph responses. Valid values are xml, json, or csv.||xml (char)|
|persistence_directory||The directory where AnzoGraph should save data when it is persisted to disk.||Not set (char)
The default directory for persisted data is install_path/persistence
|sparql_protocol_port||Specifies the SPARQL service HTTP port to use if enable_sparql_protocol is set to true.||7070 (int)|
|sparql_spec_default_graph||Controls the default scope of SPARQL queries when FROM clauses are excluded from a query. When false, queries without FROM clauses target the default graph (DEFAULTSET) only. Triples in named graphs will not be included in the scope of the query. When true, queries without FROM clauses target all graphs in the database. Triples in the default graph and any named graph are included in the scope of the query. For more information, see Changing the Default FROM Clause Behavior.||false (boolean)|
|spill_directory||The directory where AnzoGraph should save temporary query files that spill to disk.
|Not set (char)
The default directory for spill files is install_path/spill
|ssl_protocol_port||Specifies SPARQL service HTTPS port to use if enable_ssl_protocol is set to true.||8256 (int)|
|startup_info||Specifies how verbose the startup message is: - 0-quiet, 1-ready, 2-ports, 3-more.||1 (int)|
|stop_timeout||The number of seconds to wait for queries to finish before stopping the database with a -stop request.||30 (int)|
|truncate_clob||Specifies whether to truncate large strings to the maximum string size (1 MB).||false (boolean)|
|use_custom_ssl_files||Specifies whether to use custom SSL files containing fully qualified domain names.||false (boolean)|
|user_queues||Sets the limit on the number of queries that can run concurrently.||40 (int)|
|enable_unbound_variables||Controls whether AnzoGraph returns an empty result or an error if a query references a missing graph or includes unbound variables. This value is set to false by default, which means AnzoGraph returns an error. For more information, see Ignoring Missing Graphs.||false (boolean)|
|auto_restart_directory||Specifies the base location of the auto_restart directory, which contains the grey_listed, black_listed, and unanalyzed_queries directories. For more information about the auto-restart feature, see Managing the Automatic Restart Feature.||Not set (char)
The default location for the auto_restart directory is install_path/internal.
|auto_restart_max_attempts||Specifies the number of times the system manager should attempt to start the database after a crash. The default value is 5, which means the system manager will attempt to restart the database a maximum of 5 times. Changing auto_restart_max_attempts to 0 disables the auto-restart feature. For more information about the auto-restart feature, see Managing the Automatic Restart Feature.||5 (int)|
|auto_restart_time||Specifies the number of seconds to spend attempting to restart the database. If all attempts fail and this time limit is reached, the system manager stops trying to restart the database. The default value is 600, which means that the system manager will attempt to restart the database for a maximum of 600 seconds (10 minutes). For more information about the auto-restart feature, see Managing the Automatic Restart Feature.||600 (int)|