Upon upgraded to 9.1, i noticed our NS sensor has 4 types of memory usage as below:
Decrypted Flow Pool
However, i noticed that even there is no any incoming traffic , the system memory of NS sensor is higher than others memory usage type, as an example in print screen below, our NS-7300 keep showing constant system memory of 45% (the yellow dotted line) even it did not start inspecting network traffic yet.
Then ,for NS-9200, the system memory showing constant 70% memory usage when there is not any traffic too.
Is there anybody experienced this same behavior too?
While i can understand the flow pool and decrypted flow pool, but i wonder if anyone knows what Packet Buffer and System Memory meant in memory type?
Our sensor has been running for more than 1 month, we had start observing this system memory constant high issue previously when the sensor is in version 126.96.36.199. This week monday we had upgraded it to current latest, 188.8.131.52, but it is still showing the same constant memory even we had rebooted it during the upgrade.
I just wonder if it is normal for it to stays at around 50%? and why? This feature doesnt shows in M series sensor btw...