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Apply Exception and Compression to Existing Data

Question asked by hhodges on Jul 18, 2019
Latest reply on Sep 15, 2020 by iaguirre


 We have had some slow PI performance. In troubleshooting, I learned that most of our PI Points do not have exception testing on them. This could be causing the poor performance we are seeing. We may be able to improve our performance by adding exception testing to our existing PI points. My questions pertains to the data we already have in the PI Data Archive, is there any way to apply exception and/or compression testing to that data after it has already been archived? 


KB Article # 3226OSI89 Recommends the following Snapshot Event to Archive Event Ratios

Ideal: 10:1 to 100:1 (Snapshot: Archive) 

Minimum: 10:1 to 3:1 


Our current snapshot and archive info is below, we are not meeting the minimum. I'm not even sure how it is possible to have more archived events than snapshots.

Snapshot and Archive Statistics



Thank you, 

~ Heidi Apa