Check Persistent queue utilization

Splunk Enterprise

We have TCP port open for a particular source. I have added persistent queue for this particular port as users were reporting random data loss.

Is there a way to check persistent queue utilization in realtime and its historic values. Even after adding queue, users are still reporting some data loss and have not been able to confirm if this update had any positive impact due to retention period.

I would like to see if:

1) persistant queue is beeing utilized

2) IS the queue filling up as well.

I need to check this via queries preferably.

Appreciate any help that could be provided!!

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