(v22) Query Engine Properties

Query Engine Properties

Most of the query engine components can be edited in the query-engine.properties file. You can manage the query engine using the following properties. For information on editing configuration files, see Edit a Composer Configuration File.

Property	Default Value	Description
Service Logging
access.log.file.size	10	Access log file size (in MB)
qe.error.log.file.size	5	Error log file size (in MB)
log.file.size	20	General log file size (in MB)
websocket.log.file.size	10	Websocket log file size (in MB)
syslog.host	127.0.0.1	Sets the host IP address for Syslog server message logging.
syslog.log.level	OFF	Sets the syslog log level for messages logged to the Syslog server. The following options are available for this property: TRACE, DEBUG, INFO, WARN, ERROR. and OFF.
trace.requests	false	Enables detailed tracing of HTTP request
tracing.sampler.probability	1	The distributed tracing request rate percentage. Valid values are between 0 to 1.0, where 0 disables tracing and 1.0 indicates tracing 100% of requests.
General Microservice Configuration for Jetty Web Server
server.jetty.max-threads	200	Number of threads to serve the HTTP & WebSocket clients
qe.server.ws.idle.timeout	86400000	Idle time (in milliseconds) that allows the WebSocket to be still valid
qe.server.ws.input.buffer.size	16384	Buffer size (in bytes) for the WebSocket message
qe.server.ws.max.message.size	1048576	Max size (in bytes) of a message that could be sent over the query engine WebSocket
server.port	5580	REST/WebSocket microservice port
server.ssl.enabled	false	Defines whether the REST/WS API should use SSL
server.ssl.key-store		Path to the file with the keystore
Graceful Shutdown
application.graceful.shutdown.enabled	true	Indicates whether or not graceful shutdown processing should occur. Valid values are true (perform graceful shutdown processing) or false (do not perform graceful shutdown processing).
application.graceful.shutdown.event-propagation-timeout-sec	5	Specifies how long (in seconds) a query engine instance will wait to allow clients to receive the information that it is out of service.
application.graceful.shutdown.force-kill-timeout-sec	30	The maximum number of seconds that a query engine instance will wait for the number of its active tasks to reach zero. When this time has elapsed, all remaining active WebSockets serving in-flight queries are closed and then the query engine instance will stop.
Topology Configuration
calculations.detect.array.fields	true	Enables and disables the query engine validation of multivalue fields in a derived field. By disabling (set the value to false) this functionality, any custom metrics that you may have created in earlier versions of Composer that are aggregations of multivalue fields will produce valid values.
qe.max.allowed.time.groups	10000	The maximum amount of time in which groups can be generated by the Include Blanks function. For information on even time intervals, see Even Time Intervals.
qe.max.rows.during.execution	5000000	The maximum number of rows that can be processed during a single query. The value specified must be at least slightly greater than the value for the qe.zengine.edc.rows.limit property. If you increase the value of qe.zengine.edc.rows.limit, consider increasing the value of this property. When a query exceeds the limit set by this property, a Resource limit is reached during query execution message appears.
qe.zengine.edc.rows.limit	1000000	The maximum number of records that can be fused from a single data source.
sharpening.enabled	true	Enables or disables Data Sharpening. Set this property to true to enable Data Sharpening; set it to false to disable it.
sharpening.samples.max.count	100	The maximum number of Data Sharpening requests that can be generated by the sharpening process.
sharpening.samples.skip.first	1	Defines how many first samples are skipped before visualizing the result of sharpening
zoomdata.validation.histogram.max.size	1000	Histogram max bucket count