Driver Statistics
- Last UpdatedJul 07, 2025
- 1 minute read
You can use the following driver statistics to help you debug the OPC driver operation.
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Statistic |
Description |
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Cached Reads |
Number of reads that have been serviced directly from the internal cache of current values. |
|
Cache Misses |
Number of reads that were not in the internal cache of current values which resulted in a direct request from the server. |
|
Active Items |
Number of items with valid server subscriptions which have been activated to receive data change notification. This may be a subset of the total number of items currently subscribed to. |
|
Total Items |
Total number of items with valid server subscriptions. These items might or might not be currently activated to receive data change notifications. |
|
Bad Items |
Number of items that were not successfully subscribed to. These items might not exist on the server. |
|
Start ms |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |
|
Last ms |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |
|
Difference |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |
|
ReadItemsReQueued |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |
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DCBsInHandlingQ |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |
|
DataNotYetValid |
Internal driver statistic used for driver debugging by AVEVA Global Customer Support. |