I/O statistics tags

SysDataAcqNBadValues*

Number of data values with bad quality received. This tag has a storage rate of 5 seconds. The maximum is 1,000,000.

SysDataAcqNOutsideRealtime*

The number of values per second that were discarded because they arrived outside of the real-time data window. This tag has a storage rate of 5 seconds. The maximum is 1,000,000.

This tag has been deprecated and will only be available in systems migrated from AVEVA Historian 2014 and earlier.

SysDataAcqOverallItemsPerSec

The number of items received from all data sources, including HCAP. This tag has a storage rate of 10 seconds. The maximum is 100,000.

SysDataAcqRxItemPerSecN*

Tag value update received per second. This tag has a storage rate of 10 seconds.

SysDataAcqRxTotalItemsN*

Total number of tag updates received since last startup for this IDAS. This tag has a storage rate of 10 seconds.

SysPerfDataAcqNBadValues*

Number of data values with bad quality received. This tag has a storage rate of 5 seconds. The maximum is 1,000,000.

SysStatusAverageEventCommitSize

Number of events written to the A2ALMDB database per minute.

SysStatusAverageEventCommitTime

Average time, in seconds, it takes to write events to the A2ALMDB database.

SysStatusEventCommitPending

Number of events that have not yet been written to the A2ALMDB database.

SysStatusRxEventsPerSec

Number of events received per second, calculated every 10 seconds.

SysStatusRxItemsPerSec

Tag value update received per second for the system driver. This tag has a storage rate of 10 seconds.

SysStatusRxTotalDuplicateEvents

Total number of duplicate events received through different channels since startup (and discarded as duplicates).

SysStatusRxTotalEvents

Total number of events received since startup.

SysStatusRxTotalItems

Total number of tag updates received since last startup for the system driver. This tag has a storage rate of 10 seconds.

SysStatusTopicsRxData

Total number of topics receiving data. Each active IDAS "topic" and each active HCAL connection are counted. Note that process and event history, even from the same source, count as separate connections.