Stale Tags in ignition 8

Our database contains approx. 35k tags. We are getting multiple session timeouts, some tags are not coming through and at times show as “stale”.

Does anyone know a fix or know how to decrease poll rate, increase timeouts or stale threshold?

Check in your tag group for stale timeouts and poll rates. What are your poll rates in there?
Tag groups are assigned to individual tags so you could be using multiple different groups

What is your gateway server cpu utilisation at?

What version igntion?

Are you using Perspective or vision?

When you say session timeouts, is there an error and what does it say specifically?

What are the load factors of your devices? (check the gateway status page under status - > devices)

What is your gateway server cpu utilisation at?
How do I check this?

What version ignition?
8.0.15

Are you using Perspective or vision?
Vision

When you say session timeouts, is there an error and what does it say specifically?
DiskDataStore

java.io.FileNotFoundException: C:\Windows\Temp\jetty-0_0_0_0-8060-main-_-any-17619979785291176608.dir\WicketFilter-filestore\1302\7801\node01jlxlmicio8u1ef23n4irghj752\data (The system cannot find the path specified)
at java.base/java.io.RandomAccessFile.open0(Native Method)
at java.base/java.io.RandomAccessFile.open(Unknown Source)
at java.base/java.io.RandomAccessFile.(Unknown Source)
at java.base/java.io.RandomAccessFile.(Unknown Source)
at org.apache.wicket.pageStore.DiskDataStore$SessionEntry.getFileChannel(DiskDataStore.java:425)
at org.apache.wicket.pageStore.DiskDataStore$SessionEntry.savePage(DiskDataStore.java:343)
at org.apache.wicket.pageStore.DiskDataStore.storeData(DiskDataStore.java:181)
at org.apache.wicket.pageStore.AsynchronousDataStore$PageSavingRunnable.run(AsynchronousDataStore.java:355)
at java.base/java.lang.Thread.run(Unknown Source)

What are the load factors of your devices? (check the gateway status page under status - > devices)
No devices connected. Using OPC-UA