API Reference > presentation-backend > Core > PresentationManagerProps PresentationManagerProps Interface Properties that can be used to configure PresentationManager Properties Name Type Description activeLocale undefined | string Sets the active locale to use when localizing presentation-related activeUnitSystem undefined | PresentationUnitSystem Sets the active unit system to use for formatting property values with cacheConfig undefined | HierarchyCacheConfig A configuration for Presentation hierarchy cache. Beta contentCacheSize undefined | number defaultFormats undefined | { T } A map of default unit formats to use for formatting properties that don't have a presentation format enableSchemasPreload undefined | boolean Should schemas preloading be enabled. localeDirectories undefined | string[] A list of directories containing application's locale-specific localized mode undefined | PresentationManagerMode Presentation manager working mode. presentationAssetsRoot string | { backend: string, common: string } Path overrides for presentation assets. rulesetDirectories undefined | string[] A list of directories containing application's presentation rulesets. supplementalRulesetDirectories undefined | string[] A list of directories containing application's supplemental presentation rulesets. taskAllocationsMap undefined | { T } A map of 'priority' to 'number of slots allocated for simultaneously running tasks' updatesPollInterval undefined | number The interval (in milliseconds) used to poll for presentation data changes. useMmap number | boolean Use SQLite's Memory-Mapped I/O for worker connections. workerConnectionCacheSize undefined | number Each slot (see PresentationManagerProps.taskAllocationsMap) may open a worker connection to an iModel used for a request. Defined in presentation/backend/src/presentation-backend/PresentationManager.ts Line 140 Last Updated: 29 November, 2022