Tuning: Data Cache

Definition

This group includes all the system parameters and indicators concerning the data cache settings in the instances of your SAP CC system.

Description

This group includes all the system parameters concerning the cache configuration settings in the instances of the SAP CC system:

• reserved memory for the different data caches
• organization of some caches
• data compression
• invalidation
• cache warm-up settings

The group provides the indicators to view or monitor the data caches in the SAP CC system instances:

• status of the data caches
• remaining free memory
• cache refresh

Consider the following data caches:

• Provisioning data (technical name: SUBSCRIPTION CACHE)
• Guide data (technical name: GUIDING CACHE)
• Charging session data (technical name: SESSION CACHE) and subcaches
• Charging session history

Viewing and Monitoring Indicators

You can retrieve the runtime values of the following indicators in your SAP CC system:

Indicators	Summary
GUIDING_CACHE_CONSISTENCY	Do not use this indicator, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation
GUIDING_CACHE_FREE_MEMORY	The remaining free memory into the guiding cache
GUIDING_CACHE_STATUS	The status of the guiding cache
REFRESH_LAST_TRIGGER	The last date when the offer cache refresh has been triggered
REFRESH_SCHEDULER_LAST_TRIGGER	The last date when the offer cache refresh has been triggered by the scheduler
SESSION_CONSISTENCY	Do not use this indicator, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation
SESSION_FREE_MEMORY	The remaining free memory of the charging session cache
SESSION_HISTORY_CONSISTENCY	Do not use this indicator, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation
SESSION_HISTORY_FREE_MEMORY	The remaining free memory of the session history cache
SESSION_HISTORY_MEMORY_SIZE	The memory reserved for charging session histories into each rater instance
SESSION_HISTORY_STATUS	The status of the session history cache
SESSION_STATUS	The status of the session cache
SUBSCRIPTION_CACHE_CONSISTENCY	Do not use this indicator, except under SAP Support Team supervision or under specific recommendation provided within the SAP CC documentation
SUBSCRIPTION_CACHE_FREE_MEMORY	The remaining free memory into the provisioning cache
SUBSCRIPTION_CACHE_STATUS	The status of the provisioning data cache

Setting Up System Parameters

You can set up the following system parameters that are available for different instance types in the running SAP CC Core Server system.

Parameters	Summary
CACHE_COMPRESSION	Enables or disables the data compression in the caches
CACHE_INVALIDATION_TIMEOUT	The timeout in milliseconds for waiting acknowledgements for a cache invalidation request from all the system instances except the updater
CACHE_WARMUP_THREAD_COUNT	The number of threads reserved for the cache warm-up
GUIDING_CACHE_INSTANCES	The maximum number of subcaches for the guiding cache
GUIDING_CACHE_SIZE	The total memory size reserved for caching guiding information into each guider instance
REFRESH_SCHEDULER_ENABLED	Enables/disables the scheduler in charge of offer cache switching
REFRESH_SCHEDULER_RECURRENCE	The recurrence period of the scheduler in charge of refreshing the offer cache
SESSION_AVG_ID_SIZE	The average memory size allocated for one rating session ID
SESSION_AVG_NB_PER_HISTORY	The average number of sessions per subscriber
SESSION_AVG_OBJECT_SIZE	The average memory size allocated for one charging session
SESSION_MEMORY_INSTANCES	The maximum number of subcaches for the session cache
SESSION_MEMORY_SIZE	The memory reserved for charging sessions into each rater instance
SESSION_SERIALIZATION_FORMAT	The format of the session data serialization
SUBSCRIPTION_CACHE_INSTANCES	The maximum number of subcaches for the provisioning cache
SUBSCRIPTION_CACHE_SIZE	The total memory size reserved for caching provisioning data
SUBSCRIPTION_OBJECT_AVERAGE_SIZE	The average memory size allocated for one object in the provisioning cache