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   25.30    Package Registry 25.32    FHIR Performance Tracing   

25.31FHIR Performance

 

The FHIR Performance configuration category includes the following configurable options:

  • Reuse Cached Results Timeout (Millis)

  • Expire Search Results After Minutes

  • Index Missing Search Params

  • Default Total Calculation Mode

  • Suppress Scheduled Maintenance Jobs

  • Reindex Thread Count

  • Expunge Batch Size

  • Expunge Thread Count

  • Delete Enabled

25.31.1Property: Reuse Cached Results Timeout (Millis)

 
Property Name Reuse Cached Results Timeout (Millis)
Property Key
Property Type NON_NEGATIVE_INTEGER
Description If set, any searches repeated during this period for the exact same criteria will reuse the same search results instead of performing a new search. Set this value to 0 to disable the query cache entirely or set to a positive number of milliseconds to specify a specific timeout. See The Query Cache for more information.
Default Value 60000
Example Property
module.[MODULE_ID].config.dao_config.reuse_cached_results_timeout_millis = 60000

25.31.2Property: Expire Search Results After Minutes

 
Property Name Expire Search Results After Minutes
Property Key
Property Type POSITIVE_INTEGER
Description The number of minutes that search results for a given client search should be preserved before being purged from the database. See Caching Results for more information.
Default Value 60
Example Property
module.[MODULE_ID].config.dao_config.expire_search_results_after_minutes = 60

25.31.3Property: Index Missing Search Params

 
Property Name Index Missing Search Params
Property Key
Property Type ENUM
Values
  • ENABLED
  • DISABLED
Description If disabled, the FHIR endpoint will not support :missing modifiers on searches. Disabling this feature causes fewer index rows to be generated in the database when persisting resources. Note that enabling this feature this can negatively impact write performance, perticularly on systems with a large number of search parameters enabled.
Default Value DISABLED
Example Property
module.[MODULE_ID].config.indexing.index_missing_search_params = DISABLED

25.31.4Property: Default Total Calculation Mode

 
Property Name Default Total Calculation Mode
Property Key
Property Type ENUM
Values
  • NONE
  • ESTIMATED
  • ACCURATE
Description This setting may be used to force the calculation of the total number of results when large searches are performed. This setting can have an impact on performance, since calculating the total can mean an extra (potentially expensive) database query.
Default Value (no default)
Example Property
module.[MODULE_ID].config.dao_config.default_total_mode = 

25.31.5Property: Suppress Scheduled Maintenance Jobs

 
Property Name Suppress Scheduled Maintenance Jobs
Property Key
Property Type BOOLEAN
Description If this is enabled, no scheduled tasks will be invoked by this module. This setting is only useful in cases where multiple master FHIR Storage modules are pointed at the same database, in order to ensure that only one of them performs scheduled jobs.
Default Value false
Example Property
module.[MODULE_ID].config.suppress_scheduled_maintenance_jobs = false

25.31.6Property: Reindex Thread Count

 
Property Name Reindex Thread Count
Property Key
Property Type NON_NEGATIVE_INTEGER
Description This setting controls the number of threads allocated to resource reindexing (which is only ever used if SearchParameters change, or a manual reindex is triggered due to a Smile CDR upgrade or some other reason).
Default Value 2
Example Property
module.[MODULE_ID].config.dao_config.reindex_thread_count = 2

25.31.7Property: Expunge Batch Size

 
Property Name Expunge Batch Size
Property Key
Property Type NON_NEGATIVE_INTEGER
Description The expunge batch size determines the number of records deleted within a single transaction by the expunge operation.
Default Value 800
Example Property
module.[MODULE_ID].config.dao_config.expunge_batch_size = 800

25.31.8Property: Expunge Thread Count

 
Property Name Expunge Thread Count
Property Key
Property Type NON_NEGATIVE_INTEGER
Description This setting controls the number of threads allocated to the expunge operation
Default Value 2
Example Property
module.[MODULE_ID].config.dao_config.expunge_thread_count = 2

25.31.9Property: Delete Enabled

 
Property Name Delete Enabled
Property Key
Property Type BOOLEAN
Description If set to false, deletes will not be supported on this server. This should be disabled if the server does not need to support any resource deletion, as it improves performance by reducing the number of deletion checks performed during write operations.
Default Value true
Example Property
module.[MODULE_ID].config.dao_config.delete_enabled = true
   25.30    Package Registry 25.32    FHIR Performance Tracing