We did a change from another vendor to PA. We realise that backups (vmware) were transferring very slow. So we created a app_override in order to avoid L7 in this VMware traffic. After that the spped for backpus got better.
So i have several qestions:
-Why is this happening? whats wrong L7 inspection does in order to slowness?
-what kind of traffic app_override can improve?
First I recommend to upgrade to 9.0.13 which is the preferred releasd of PAN-OS 9.0. (PAN-OS 9.0.9 is almost one year old).
The issue might be some bug in app-id processing that some buffers are full and because of that packets are dropped which results in poor performance. Something like that you may see when you check the global counters (with proper filters for your backup connection applied). As you no diabled layer 7 processing the buffers aren't used and the performance isn't degraded. Obviously this is only an assumption as I don't know this issue in detail, but again, I recommend to upgrade and check again then if it may be already solved the issue.
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